博客园_熊哥 www.relaxlife.net

IDataReader/DataTable扩展ToList<T> 改进版，反射速度慢的惊人！

2010-09-01T14:27:00Z

完整源代码购买：http://livexy.taobao.com/

IDataReader扩展ToList<T> 改进版

        //最快和直接循环差不多
        public static List<TResult> ToList<TResult>(this IDataReader dr, bool isClose) where TResult : class, new() {
            IDataReaderEntityBuilder<TResult> eblist = IDataReaderEntityBuilder<TResult>.CreateBuilder(dr);
            List<TResult> list = new List<TResult>();
            if (dr == null) return list;
            while (dr.Read()) list.Add(eblist.Build(dr));
            if (isClose) { dr.Close(); dr.Dispose(); dr = null; }
            return list;
        }
        public static List<TResult> ToList<TResult>(this IDataReader dr) where TResult : class, new() {
            return dr.ToList<TResult>(true);
        }

        //也慢
        public static List<TResult> ToList2<TResult>(this IDataReader dr, bool isClose) where TResult : class, new() {
            List<TResult> oblist = new List<TResult>();
            if (dr == null) return oblist;

            List<string> drColumns = new List<string>();
            int len = dr.FieldCount;
            for (int j = 0; j < len; j++) drColumns.Add(dr.GetName(j).Trim());

            List<PropertyInfo> prlist = new List<PropertyInfo>();
            Type t = typeof(TResult);
            Array.ForEach<PropertyInfo>(t.GetPropertiesCache(), p => { if (drColumns.IndexOf(p.Name) != -1) prlist.Add(p); });

            while (dr.Read()) {
                TResult ob = new TResult();
                prlist.ForEach(p => { if (dr[p.Name] != DBNull.Value) p.SetValue(ob, dr[p.Name], null); });
                oblist.Add(ob);
            }
            if (isClose) { dr.Close(); dr.Dispose(); dr = null; }
            return oblist;
        }
        public static List<TResult> ToList2<TResult>(this IDataReader dr) where TResult : class, new() {
            return dr.ToList2<TResult>(true);
        }

        //最慢
        public static List<TResult> ToList3<TResult>(this IDataReader dr, bool isClose) where TResult : class, new() {
            List<TResult> list = new List<TResult>();
            if (dr == null) return list;
            int len = dr.FieldCount;

            while (dr.Read()) {
                TResult info = new TResult();
                for (int j = 0; j < len; j++) {
                    if (dr[j] == null || string.IsNullOrEmpty(dr[j].ToString())) continue;
                    info.GetType().GetPropertyCache(dr.GetName(j).Trim()).SetValue(info, dr[j], null);
                }
                list.Add(info);
            }
            if (isClose) { dr.Close(); dr.Dispose(); dr = null; }
            return list;
        }
        public static List<TResult> ToList3<TResult>(this IDataReader dr) where TResult : class, new() {
            return dr.ToList3<TResult>(true);
        }

谢谢"幸运草"提供更快速的DataReader转实体LIST的代码.我将发在这里:

    public class IDataReaderEntityBuilder<Entity> {
        private static readonly MethodInfo getValueMethod =
        typeof(IDataRecord).GetMethod("get_Item", new Type[] { typeof(int) });
        private static readonly MethodInfo isDBNullMethod =
            typeof(IDataRecord).GetMethod("IsDBNull", new Type[] { typeof(int) });
        private delegate Entity Load(IDataRecord dataRecord);

        private Load handler;
        private IDataReaderEntityBuilder() { }
        public Entity Build(IDataRecord dataRecord) {
            return handler(dataRecord);
        }
        public static IDataReaderEntityBuilder<Entity> CreateBuilder(IDataRecord dataRecord) {
            IDataReaderEntityBuilder<Entity> dynamicBuilder = new IDataReaderEntityBuilder<Entity>();
            DynamicMethod method = new DynamicMethod("DynamicCreateEntity", typeof(Entity),
                    new Type[] { typeof(IDataRecord) }, typeof(Entity), true);
            ILGenerator generator = method.GetILGenerator();
            LocalBuilder result = generator.DeclareLocal(typeof(Entity));
            generator.Emit(OpCodes.Newobj, typeof(Entity).GetConstructor(Type.EmptyTypes));
            generator.Emit(OpCodes.Stloc, result);
            for (int i = 0; i < dataRecord.FieldCount; i++) {
                PropertyInfo propertyInfo = typeof(Entity).GetProperty(dataRecord.GetName(i));
                Label endIfLabel = generator.DefineLabel();
                if (propertyInfo != null && propertyInfo.GetSetMethod() != null) {
                    generator.Emit(OpCodes.Ldarg_0);
                    generator.Emit(OpCodes.Ldc_I4, i);
                    generator.Emit(OpCodes.Callvirt, isDBNullMethod);
                    generator.Emit(OpCodes.Brtrue, endIfLabel);
                    generator.Emit(OpCodes.Ldloc, result);
                    generator.Emit(OpCodes.Ldarg_0);
                    generator.Emit(OpCodes.Ldc_I4, i);
                    generator.Emit(OpCodes.Callvirt, getValueMethod);
                    generator.Emit(OpCodes.Unbox_Any, dataRecord.GetFieldType(i));
                    generator.Emit(OpCodes.Callvirt, propertyInfo.GetSetMethod());
                    generator.MarkLabel(endIfLabel);
                }
            }
            generator.Emit(OpCodes.Ldloc, result);
            generator.Emit(OpCodes.Ret);
            dynamicBuilder.handler = (Load)method.CreateDelegate(typeof(Load));
            return dynamicBuilder;
        }
    }

使用反射的同志们，请放泣使用反射方法转实体类LIST.

DataTable扩展ToList<T> 改进版

        //最快和直接循环差不多
        public static List<TResult> ToList<TResult>(this DataTable dt) where TResult : class, new() {
            List<TResult> list = new List<TResult>();
            if (dt == null) return list;
            DataTableEntityBuilder<TResult> eblist = DataTableEntityBuilder<TResult>.CreateBuilder(dt.Rows[0]);
            foreach(DataRow info in dt.Rows) list.Add(eblist.Build(info));
            dt.Dispose(); dt = null;
            return list;
        }

        //也慢
        public static List<TResult> ToList2<TResult>(this DataTable dt) where TResult : class, new() {
            List<PropertyInfo> prlist = new List<PropertyInfo>();
            Type t = typeof(TResult);
            Array.ForEach<PropertyInfo>(t.GetPropertiesCache(), p => { if (dt.Columns.IndexOf(p.Name) != -1) prlist.Add(p); });
            List<TResult> oblist = new List<TResult>();

            foreach (DataRow row in dt.Rows) {
                TResult ob = new TResult();
                prlist.ForEach(p => { if (row[p.Name] != DBNull.Value) p.SetValue(ob, row[p.Name], null); });
                oblist.Add(ob);
            }
            return oblist;
        }

        //最慢
        public static List<TResult> ToList3<TResult>(this DataTable dt) where TResult : class, new() {
            List<TResult> list = new List<TResult>();
            if (dt == null) return list;
            int len = dt.Rows.Count;

            for (int i = 0; i < len; i++) {
                TResult info = new TResult();
                foreach (DataColumn dc in dt.Rows[0].Table.Columns) {
                    if (dt.Rows[i][dc.ColumnName] == null || string.IsNullOrEmpty(dt.Rows[i][dc.ColumnName].ToString())) continue;
                    info.GetType().GetPropertyCache(dc.ColumnName).SetValue(info, dt.Rows[i][dc.ColumnName], null);
                }
                list.Add(info);
            }
            dt.Dispose(); dt = null;
            return list;
        }

    public class DataTableEntityBuilder<Entity> {
        private static readonly MethodInfo getValueMethod = typeof(DataRow).GetMethod("get_Item", new Type[] { typeof(int) });
        private static readonly MethodInfo isDBNullMethod = typeof(DataRow).GetMethod("IsNull", new Type[] { typeof(int) });
        private delegate Entity Load(DataRow dataRecord);

        private Load handler;
        private DataTableEntityBuilder() { }

        public Entity Build(DataRow dataRecord) {
            return handler(dataRecord);
        }
        public static DataTableEntityBuilder<Entity> CreateBuilder(DataRow dataRecord) {
            DataTableEntityBuilder<Entity> dynamicBuilder = new DataTableEntityBuilder<Entity>();
            DynamicMethod method = new DynamicMethod("DynamicCreateEntity", typeof(Entity), new Type[] { typeof(DataRow) }, typeof(Entity), true);
            ILGenerator generator = method.GetILGenerator();
            LocalBuilder result = generator.DeclareLocal(typeof(Entity));
            generator.Emit(OpCodes.Newobj, typeof(Entity).GetConstructor(Type.EmptyTypes));
            generator.Emit(OpCodes.Stloc, result);

            for (int i = 0; i < dataRecord.ItemArray.Length; i++) {
                PropertyInfo propertyInfo = typeof(Entity).GetProperty(dataRecord.Table.Columns[i].ColumnName);
                Label endIfLabel = generator.DefineLabel();
                if (propertyInfo != null && propertyInfo.GetSetMethod() != null) {
                    generator.Emit(OpCodes.Ldarg_0);
                    generator.Emit(OpCodes.Ldc_I4, i);
                    generator.Emit(OpCodes.Callvirt, isDBNullMethod);
                    generator.Emit(OpCodes.Brtrue, endIfLabel);
                    generator.Emit(OpCodes.Ldloc, result);
                    generator.Emit(OpCodes.Ldarg_0);
                    generator.Emit(OpCodes.Ldc_I4, i);
                    generator.Emit(OpCodes.Callvirt, getValueMethod);
                    generator.Emit(OpCodes.Unbox_Any, propertyInfo.PropertyType);
                    generator.Emit(OpCodes.Callvirt, propertyInfo.GetSetMethod());
                    generator.MarkLabel(endIfLabel);
                }
            }
            generator.Emit(OpCodes.Ldloc, result);
            generator.Emit(OpCodes.Ret);
            dynamicBuilder.handler = (Load)method.CreateDelegate(typeof(Load));
            return dynamicBuilder;
        }
    }

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本文链接

(急聘) 高级软件工程师（C#.Net/JS） http://job.cnblogs.com/offer/8966/

2010-08-31T13:55:00Z

(急聘) 高级软件工程师（C#.Net/JS） http://job.cnblogs.com/offer/8966/

本文链接

C＃.Net 随机数

2010-08-31T03:49:00Z

using System;
using System.Text;
using System.Collections.Generic;

namespace Pub.Class
{
/// <summary>
/// 生成随机数类
/// </summary>
public class Rand
{
/// <summary>
/// 随机系数
/// </summary>
public static int _RandIndex = 0;

#region RndInt
/// <summary>
/// 数字随机数
/// </summary>
/// <param name="num1">开始</param>
/// <param name="num2">结束</param>
/// <returns>从多少到多少之间的数据包括开始不包括结束</returns>
public static int RndInt(int num1,int num2) {
if (_RandIndex >= 1000000) _RandIndex = 1;
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
_RandIndex++;
return rnd.Next(num1, num2);
}

public static IList<int> RndInt(int num1,int num2, int len) {
IList<int> list = new List<int>();
for (int i = 0; i < len; i++) list.Add(RndInt(num1, num2));
return list;
}

public static IList<int> RndInt(int len) {
IList<int> list = RndInt(0, int.MaxValue, len);
return list;
}
#endregion

#region RndNum
/// <summary>
/// 数字随机数
/// </summary>
/// <param name="length">生成长度</param>
/// <returns>返回指定长度的数字随机串</returns>
public static string RndNum(int length)
{
if (_RandIndex >= 1000000) _RandIndex = 1;
char[] arrChar = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
StringBuilder num = new StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
for (int i = 0; i < length; i++) {
num.Append(arrChar[rnd.Next(0, 9)].ToString());
}
return num.ToString();
}
#endregion

#region RndDateStr
/// <summary>
/// 日期随机函数
/// </summary>
/// <returns>返回日期随机串</returns>
public static string RndDateStr()
{
return DateTime.Now.ToString("yyyyMMddHHmmssfff") + Rand.RndInt(1000, 9999).ToString();
}
public static IList<string> RndDateStr(int len) {
IList<string> list = new List<string>();
for (int i = 0; i < len; i++) list.Add(RndDateStr());
return list;
}

#endregion

#region RndCode
/// <summary>
/// 数字和字母随机数
/// </summary>
/// <param name="length">生成长度</param>
/// <returns>返回指定长度的数字和字母的随机串</returns>
public static string RndCode(int length)
{
if (_RandIndex >= 1000000) _RandIndex = 1;
char[] arrChar = new char[]{
'a','b','d','c','e','f','g','h','i','j','k','l','m','n','p','r','q','s','t','u','v','w','z','y','x',
'0','1','2','3','4','5','6','7','8','9',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','Q','P','R','T','S','V','U','W','X','Y','Z'};
System.Text.StringBuilder num = new System.Text.StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
for (int i = 0; i < length; i++) {
num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());
}
return num.ToString();
}
public static IList<string> RndCodeList(int len) {
IList<string> list = new List<string>();
for (int i = 0; i < len; i++) list.Add(RndCode(len));
return list;
}
#endregion

#region RndLetter
/// <summary>
/// 字母随机数
/// </summary>
/// <param name="length">生成长度</param>
/// <returns>返回指定长度的字母随机数</returns>
public static string RndLetter(int length) {
if (_RandIndex >= 1000000) _RandIndex = 1;
char[] arrChar = new char[]{
'a','b','d','c','e','f','g','h','i','j','k','l','m','n','p','r','q','s','t','u','v','w','z','y','x',
'_',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','Q','P','R','T','S','V','U','W','X','Y','Z'};
StringBuilder num = new StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
for (int i = 0; i < length; i++) {
num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());
}
return num.ToString();
}
public static IList<string> RndLetterList(int len) {
IList<string> list = new List<string>();
for (int i = 0; i < len; i++) list.Add(RndLetter(len));
return list;
}
#endregion

#region GetGuid
/// <summary>
/// 生成GUID
/// </summary>
/// <returns></returns>
public static string GetGuid()
{
System.Guid g = System.Guid.NewGuid();
return g.ToString();
}
public static IList<string> GetGuid(int len) {
IList<string> list = new List<string>();
for (int i = 0; i < len; i++) list.Add(GetGuid());
return list;
}
#endregion
}
}

本文链接

C#.NET IEnumerable扩展 ToDataTable/ToPage/ToJson/ForEach/In/Do/Slice

2010-08-29T05:09:00Z

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Data;
using System.Data.Common;
using System.Web.Script.Serialization;
using System.IO;
using System.Security.Cryptography;
using System.Collections;
using System.Collections.ObjectModel;

namespace Pub.Class {
public static class IEnumerableExtensions {

public static bool IsNullEmpty(this IEnumerable source) {
if (source == null) return true;
foreach (var item in source) return false;
return true;
}
public static DataTable ToDataTable<T>(this IEnumerable<T> varlist) {
DataTable dtReturn = new DataTable();
PropertyInfo[] oProps = null;
if (varlist == null) return dtReturn;

foreach (T rec in varlist) {
if (oProps == null) {
oProps = ((Type)rec.GetType()).GetProperties();
foreach (PropertyInfo pi in oProps) {
Type colType = pi.PropertyType;
if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable <>))) colType = colType.GetGenericArguments()[0];
dtReturn.Columns.Add(new DataColumn(pi.Name, colType));
}
}
DataRow dr = dtReturn.NewRow();
foreach (PropertyInfo pi in oProps) dr[pi.Name] = pi.GetValue(rec, null) == null ? DBNull.Value : pi.GetValue(rec, null);
dtReturn.Rows.Add(dr);
}
return dtReturn;
}
public static List<TSource> ToPage<TSource>(this IEnumerable<TSource> varlist, int pageIndex,int pageSize,out int totalRecords) {
totalRecords = varlist.Count();
return varlist.Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
}
public static string ToJson<TSource, TResult>(this IEnumerable<TSource> varlist, Func<TSource, TResult> selector) {
return varlist.Select(selector).ToJson();
}

public static IEnumerable<TTarget> ConvertList<TSource, TTarget>(this IEnumerable<TSource> source) {
foreach(var value in source) {
yield return value.ConvertTo<TTarget>();
}
}
public static IEnumerable<T> ForEach<T>(this IEnumerable<T> source, Action<T> action) {
foreach (T element in source) {
action(element);
yield return element;
}
}
public static IEnumerable<T> ForEach<T>(this IEnumerable<T> items, Action<T> odd, Action<T> even) {
bool isOdd = true;
return ForEach(items, item => {
if (isOdd) odd(item); else even(item);
isOdd = !isOdd;
});
}
public static IEnumerable<T> MergeWith<T>(this IEnumerable<T> target, params IEnumerable<T>[] data) {
List<T> list = new List<T>( target );
data.ForEach( array => list.AddRange( array ) );
return list;
}
public static IEnumerable<T> With<T>(this IEnumerable<T> source, T item) {
foreach (T t in source) yield return t;
yield return item;
}
public static bool ContainsAtLeast<T>(this IEnumerable<T> enumeration, int count) {
if (enumeration == null) throw new ArgumentNullException("enumeration");
return (from t in enumeration.Take(count) select t).Count() == count;
}
public static IEnumerable<T[]> GroupEvery<T>(this IEnumerable<T> enumeration, int count) {
if (enumeration == null) throw new ArgumentNullException("IEnumerable cannot be null.");
if (count <= 0) throw new ArgumentOutOfRangeException("The count parameter must be greater than zero.");
int current = 0;
T[] array = new T[count];
foreach (var item in enumeration) {
array[current++] = item;
if (current == count) {
yield return array;
current = 0;
array = new T[count];
}
}
if (current != 0) yield return array;
}
public static int IndexOf<T>(this IEnumerable<T> enumeration, T value) where T : IEquatable<T> {
return enumeration.IndexOf<T>(value, EqualityComparer<T>.Default);
}
public static int IndexOf<T>(this IEnumerable<T> enumeration, T value, IEqualityComparer<T> comparer) {
int index = 0;
foreach (var item in enumeration) {
if (comparer.Equals(item, value)) return index;
index++;
}
return -1;
}
public static int IndexOf<T>(this IEnumerable<T> enumeration, T value, int startIndex) where T : IEquatable<T> {
return enumeration.IndexOf<T>(value, startIndex, EqualityComparer<T>.Default);
}
public static int IndexOf<T>(this IEnumerable<T> enumeration, T value, int startIndex, IEqualityComparer<T> comparer) {
for (int i = startIndex; i < enumeration.Count(); i++) {
T item = enumeration.ElementAt(i);
if (comparer.Equals(item, value)) return i;
}
return -1;
}
public static int IndexOfPrevious<T>(this IEnumerable<T> items, T value, int fromIndex) {
for (int i = fromIndex - 1; i > -1; i--) {
T item = items.ElementAt(i);
if (EqualityComparer<T>.Default.Equals(item, value)) return i;
}
return -1;
}
public static bool Contains<T>(this IEnumerable<T> items, T value) {
if (items == null) throw new ArgumentNullException("items");

ICollection<T> c = items as ICollection<T>;
if (c != null) return c.Contains(value);

throw new NotImplementedException();
}

public static T Constructor<T>(this IEnumerable<object> Parameters, IDictionary<string, object> Properties) where T: class {
Type ttype = typeof(T);
T obj = (T)Activator.CreateInstance(typeof(T), Parameters);
foreach (string key in Properties.Keys) {
PropertyInfo prop = ttype.GetProperty(key);
if (prop != null) prop.SetValue(obj, Properties[key], null);
}
return obj;
}

public static IEnumerable<T> Flatten<T>(this IEnumerable<T> inputs, Func<T, IEnumerable<T>> enumerate) {
if (inputs != null) {
var stack = new Stack<T>(inputs);
while (stack.Count > 0) {
var current = stack.Pop();
if (current == null) continue;
yield return current;
var enumerable = enumerate != null ? enumerate(current) : null;
if (enumerable != null) {
foreach (var child in enumerable) stack.Push(child);
}
}
}
}
public static IEnumerable Flatten(this IEnumerable inputs, Func<object, System.Collections.IEnumerable> enumerate) {
return Flatten<object>(inputs.Cast<object>(), o => (enumerate(o) ?? new object[0]).Cast<object>());
}

public static ReadOnlyCollection<T> AsReadOnly<T>(this IEnumerable<T> @this) {
return new ReadOnlyCollection<T>(new List<T>(@this));
}

public static bool In<T>(this T source, IEnumerable<T> values) where T : IEquatable<T> {
if (values == null) return false;

foreach (T listValue in values) {
if ((default(T).Equals(source) && default(T).Equals(listValue)) || (!default(T).Equals(source) && source.Equals(listValue))) return true;
}

return false;
}

public static IEnumerable<TSource> Do<TSource>(this IEnumerable<TSource> source, Action<TSource> action) {
foreach (var x in source) action(x);
return source;
}
public static IEnumerable Do(this IEnumerable source, Action<object> action) {
foreach (var x in source) action(x);
return source;
}
public static IEnumerable<TSource> Do<TSource>(this IEnumerable<TSource> source, Action<TSource, int> action) {
var i = 0;
foreach (var x in source) action(x, i++);
return source;
}
public static IEnumerable Do(this IEnumerable source, Action<object, int> action) {
var i = 0;
foreach (var x in source) action(x, i++);
return source;
}

public static IEnumerable<TSource> Concat<TSource>(this IEnumerator<TSource> left, IEnumerator<TSource> right) {
while (left.MoveNext()) yield return left.Current;
while (right.MoveNext()) yield return right.Current;
}
public static IEnumerable<TSource> Concat<TSource>(this IEnumerator<TSource> left, TSource last) {
while (left.MoveNext()) yield return left.Current;
yield return last;
}
public static IEnumerable<TSource> Concat<TSource>(this TSource first, IEnumerator<TSource> right) {
yield return first;
while (right.MoveNext()) yield return right.Current;
}

public static IEnumerable<IEnumerable<T>> Partition<T>(this IEnumerable<T> source, int size) {
int index = 1;
IEnumerable<T> partition = source.Take(size).AsEnumerable();
while (partition.Any()) {
yield return partition;
partition = source.Skip(index++ * size).Take(size).AsEnumerable();
}
}

public static IEnumerable<T> Slice<T>(this IEnumerable<T> source, int? start) { return Slice<T>(source, start, null, null); }

public static IEnumerable<T> Slice<T>(this IEnumerable<T> source, int? start, int? stop) { return Slice<T>(source, start, stop, null); }

public static IEnumerable<T> Slice<T>(this IEnumerable<T> source, int? start, int? stop, int? step) {
if (source == null) throw new ArgumentNullException("source");
if (step == 0) throw new ArgumentException("Step cannot be zero.", "step");

IList<T> sourceCollection = source as IList<T>;
if (sourceCollection == null)
sourceCollection = new List<T>(source);

// nothing to slice
if (sourceCollection.Count == 0) yield break;

// set defaults for null arguments
int stepCount = step ?? 1;
int startIndex = start ?? ((stepCount > 0) ? 0 : sourceCollection.Count - 1);
int stopIndex = stop ?? ((stepCount > 0) ? sourceCollection.Count : -1);

// start from the end of the list if start is negitive
if (start < 0) startIndex = sourceCollection.Count + startIndex;

// end from the start of the list if stop is negitive
if (stop < 0) stopIndex = sourceCollection.Count + stopIndex;

// ensure indexes keep within collection bounds
startIndex = Math.Max(startIndex, (stepCount > 0) ? 0 : int.MinValue);
startIndex = Math.Min(startIndex, (stepCount > 0) ? sourceCollection.Count : sourceCollection.Count - 1);
stopIndex = Math.Max(stopIndex, -1);
stopIndex = Math.Min(stopIndex, sourceCollection.Count);

for (int i = startIndex; (stepCount > 0) ? i < stopIndex : i > stopIndex; i += stepCount) yield return sourceCollection[i];

yield break;
}
}
}

ToJson调用实例:

private void loadlp(){
IList<LP_Task> list = LP_TaskFactory.Instance().SelectListByCustomerID(Customer.CustomerID.Value, "", "", "", true).Where(p => p.JobID == CurrentUser.Job && p.Status == 1).OrderByDescending(p => p.Quarter).ToList();
string data = list.ToJson(p => new {
id = p.TaskID,
title = p.TaskName,
text = p.Intro,
quarter = p.Quarter,
abilitys = LP_TaskAbilityFactory.Instance().SelectListByTaskID(p.TaskID.Value, "", "", "", true).Select(z => new {
id = z.AbilityID,
level = z.LPLevel,
info = LP_AbilityFactory.Instance().SelectListByCustomerID(CurrentUser.CustomerID.Value, "", "", "", true)
.Where(y => y.AbilityID == z.AbilityID).ToList()
.Select(y => new { y.Ability, LevelText = (z.LPLevel == 1 ? y.Level1Intro : z.LPLevel == 2 ? y.Level2Intro : y.Level3Intro) }).FirstOrDefault()
}),
nodes = LP_TaskDetailFactory.Instance().SelectListByTaskID(p.TaskID.Value, "", "", "", true).Select(d => new { d.DetailMonths, d.DetailName, d.DetailType, d.DetailIntro, d.Days })
});
Msg.WriteEnd(data);
}

linq 递归

public IEnumerable GetCourseSeriesTree3(int parentID) {
IList<CC_CourseSeries> list = CC_CourseSeriesFactory.Instance().SelectCourseSeriesListByCustomerID((int)CurrentUser.CustomerID, true);
var list2 = list.Where(p => p.ParentID == parentID).Select(p => new {
id = p.SeriesID,
name = p.SeriesName.UnHtml(),
node = GetCourseSeriesTree3((int)p.SeriesID)
});
return list2;
}
public IEnumerable GetCourseSeriesTree(int parentID) {
IList<CC_CourseSeries> list = CC_CourseSeriesFactory.Instance().SelectCourseSeriesListByCustomerID((int)CurrentUser.CustomerID, true);
return FuncExtensions.Fix<int, IEnumerable>(f => p => {
var list2 = list.Where(o => o.ParentID == p).Select(o => new {
id = o.SeriesID,
name = o.SeriesName.UnHtml(),
node = f((int)o.SeriesID)
});
return list2;
})(parentID);
}

本文链接

C#.NET发EMAIL的几种方法 MailMessage/SmtpClient/CDO.Message

2010-08-26T04:44:00Z

C#.NET发EMAIL的几种方法 MailMessage/SmtpClient/CDO.Message

源代码如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Net.Mail;
using System.Net;

namespace Pub.Class
{
/// <summary>
/// 发送Email类
/// </summary>
public class Email
{
#region 私有成员
private static object lockHelper = new object();
private string _From;
private string _FromEmail;
private string _Subject;
private string _Body;
private string _SmtpServer;
private string _SmtpPort = "25";
private string _SmtpUserName;
private string _SmtpPassword;
private System.Web.Mail.MailFormat _Format = System.Web.Mail.MailFormat.Html;
private System.Text.Encoding _Encoding = System.Text.Encoding.Default;
#endregion

#region 属性
/// <summary>
/// 正文内容类型
/// </summary>
public System.Web.Mail.MailFormat Format { set { _Format = value; } }
/// <summary>
/// 正文内容编码
/// </summary>
public System.Text.Encoding Encoding { set { _Encoding = value; } }
/// <summary>
/// FromEmail 发送方地址(如test@163.com)
/// </summary>
public string FromEmail { set { _FromEmail = value; } }
/// <summary>
/// From
/// </summary>
public string From { set { _From = value; } }
/// <summary>
/// 主题
/// </summary>
public string Subject { set { _Subject = value; } }
/// <summary>
/// 内容
/// </summary>
public string Body { set { _Body = value; } }
/// <summary>
/// SmtpServer
/// </summary>
public string SmtpServer { set { _SmtpServer = value; } }
/// <summary>
/// SmtpPort
/// </summary>
public string SmtpPort { set { _SmtpPort = value; } }
/// <summary>
/// SmtpUserName
/// </summary>
public string SmtpUserName { set { _SmtpUserName = value; } }
/// <summary>
/// SmtpPassword
/// </summary>
public string SmtpPassword { set { _SmtpPassword = value; } }
#endregion

#region 构造器
/// <summary>
/// 构造器
/// </summary>
public Email() { }
#endregion

#region Send
/// <summary>
/// 发送EMAIL
/// </summary>
/// <example>
/// <code>
/// Email _Email = new Email();
/// _Email.FromEmail = "test@163.com";
/// _Email.Subject = "<div>aaaa</div>";
/// _Email.Body = "aaaaaaaaaaaaa";
/// _Email.SmtpServer = "smtp.163.com";
/// _Email.SmtpUserName = "aaa";
/// _Email.SmtpPassword = "aaa";
/// _Email.Send("test@163.com");
/// </code>
/// </example>
/// <param name="toEmail">收信人接收方地址</param>
/// <returns>成功否</returns>
public bool SmtpMailSend(string toEmail) {
lock (lockHelper) {
System.Web.Mail.MailMessage msg = new System.Web.Mail.MailMessage();
try {
msg.From = _FromEmail;//发送方地址(如test@163.com)
msg.To = toEmail;//接收方地址
msg.BodyFormat = _Format;//正文内容类型
msg.BodyEncoding = _Encoding;//正文内容编码
msg.Subject = _Subject;//主题
msg.Body = _Body;//内容
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");//设置为需要用户验证
if (!_SmtpPort.Equals("25")) msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", _SmtpPort);//设置端口
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", _SmtpUserName);//设置验证用户名
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", _SmtpPassword);//设置验证密码
System.Web.Mail.SmtpMail.SmtpServer = _SmtpServer;//邮件服务器地址(如smtp.163.com)
System.Web.Mail.SmtpMail.Send(msg);//发送
return true;
} catch { } finally {

}
}
return false;
}

/// <summary>
/// 发送EMAIL
/// </summary>
/// <param name="toEmail">Email</param>
/// <returns>是否成功</returns>
public bool CDOMessageSend(string toEmail) {
lock (lockHelper) {
CDO.Message objMail = new CDO.Message();
try {
objMail.To = toEmail;
objMail.From = _FromEmail;
objMail.Subject = _Subject;
if (_Format.Equals(System.Web.Mail.MailFormat.Html)) objMail.HTMLBody = _Body; else objMail.TextBody = _Body;
//if (!_SmtpPort.Equals("25")) objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"].Value = _SmtpPort; //设置端口
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value = _SmtpServer;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"].Value = 1;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout"].Value = 10;
objMail.Configuration.Fields.Update();
objMail.Send();
return true;
} catch {} finally{

}
System.Runtime.InteropServices.Marshal.ReleaseComObject(objMail);
objMail = null;
}
return false;
}
/// <summary>
/// CDOMessageSend
/// </summary>
/// <param name="toEmail"></param>
/// <param name="sendusing"></param>
/// <returns></returns>
public bool CDOMessageSend(string toEmail,int sendusing) {
lock (lockHelper) {
CDO.Message objMail = new CDO.Message();
try {
objMail.To = toEmail;
objMail.From = _FromEmail;
objMail.Subject = _Subject;
if (_Format.Equals(System.Web.Mail.MailFormat.Html)) objMail.HTMLBody = _Body; else objMail.TextBody = _Body;
if (!_SmtpPort.Equals("25")) objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"].Value = _SmtpPort; //设置端口
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value = _SmtpServer;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"].Value = sendusing;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendemailaddress"].Value = _FromEmail;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpuserreplyemailaddress"].Value = _FromEmail;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpaccountname"].Value = _SmtpUserName;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"].Value = _SmtpUserName;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"].Value = _SmtpPassword;
objMail.Configuration.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"].Value=1;

objMail.Configuration.Fields.Update();
objMail.Send();
return true;
} catch { } finally{

}
System.Runtime.InteropServices.Marshal.ReleaseComObject(objMail);
objMail = null;
}
return false;
}
/// <summary>
/// SmtpClientSend
/// </summary>
/// <param name="toEmail"></param>
/// <returns></returns>
public bool SmtpClientSend(string toEmail) {
lock (lockHelper) {
System.Net.Mail.MailMessage message = new MailMessage(_FromEmail, toEmail, _Subject, _Body);
message.SubjectEncoding = _Encoding;
message.BodyEncoding = _Encoding;
message.IsBodyHtml = true;
message.Priority = MailPriority.High;

SmtpClient client = new SmtpClient(_SmtpServer);
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential(_SmtpUserName, _SmtpPassword);
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.Port = Str.ToInt(_SmtpPort, 587);
client.EnableSsl = true;
try {
client.Send(message);
} catch {
return false;
}
return true;
}
}

#endregion
}
}

多线程服务调用：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration.Install;
using System.ServiceProcess;
using System.Collections;
using System.Threading;
using System.Xml;
using System.IO;
using System.Net.Mail;
using System.Runtime.Remoting.Channels.Tcp;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting;
using Pub.Class;
using System.Diagnostics;

namespace MailService {

[RunInstaller(true)]
public partial class MService : ServiceBase {
public static bool isRun = false;
public Queue emailQueue = new Queue();
private Thread readEmailThread;
private Thread[] sendEmailThread;
private string[] strList = new string[] { "MailService 启动成功！", "MailService 停止！", "{2} {1} - [{0}] - 发送失败!", "{2} {1} - [{0}] - 发送成功!", "LiveRemotingService 已启动，服务端口6669。", "LiveRemotingService 停止！" };

private struct Config {
public string Conn;
public string LogFile;
public string SmtpServer;
public string UserName;
public string Password;
public string FromAddress;
public int AmountThread;
public int RecordCount;
public int TimeInterval;
}
private Config config = new Config();

public MService() {
System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
InitializeComponent();

if (!System.Diagnostics.EventLog.SourceExists("MailSource")) System.Diagnostics.EventLog.CreateEventSource("MailSource", "MailServiceLog");
this.eventLog1.Source = "MailSource";
this.eventLog1.Log = "MailServiceLog";
this.eventLog2.Source = "LiveRemotingSource";
this.eventLog2.Log = "MailServiceLog";
}

protected override void OnStart(string[] args) {
try {
InitConfig();
this.eventLog1.WriteEntry(strList[0], System.Diagnostics.EventLogEntryType.SuccessAudit);

this.timer1.Interval = config.TimeInterval * 1000;
this.timer1.Enabled = true;
sendEmailThread = new Thread[config.AmountThread];
} catch (Exception e) {
this.eventLog1.WriteEntry(e.ToString(), System.Diagnostics.EventLogEntryType.Error);
}
}

protected override void OnStop() {
this.eventLog1.WriteEntry(strList[1], System.Diagnostics.EventLogEntryType.SuccessAudit);
GC.Collect();
this.timer1.Enabled = false;
}

private void timer1_Elapsed(object sender, System.Timers.ElapsedEventArgs e) {
if (isRun) return;

timer1.Enabled = false;
readEmailThread = new Thread(new ThreadStart(ReadEmailQuque));
readEmailThread.IsBackground = true;
readEmailThread.Start();
}

private void InitConfig(){
config.Conn = Pub.Class.WebConfig.GetApp("ConnString");
config.LogFile = Pub.Class.WebConfig.GetApp("logFile");
config.SmtpServer = Pub.Class.WebConfig.GetApp("SmtpServer");
config.UserName = Pub.Class.WebConfig.GetApp("UserName");
config.Password = Pub.Class.WebConfig.GetApp("Password");
config.FromAddress = Pub.Class.WebConfig.GetApp("FromAddress");
string amountThread = Pub.Class.WebConfig.GetApp("AmountThread");
config.AmountThread = amountThread.Equals("") ? 1 : Convert.ToInt32(amountThread);
config.AmountThread = config.AmountThread < 1 ? 1 : config.AmountThread;
string recordCount = Pub.Class.WebConfig.GetApp("RecordCount");
config.RecordCount = recordCount.Equals("") ? 1000 : Convert.ToInt32(recordCount);
config.RecordCount = config.RecordCount < 1000 ? 1000 : config.RecordCount;
string timeInterval = Pub.Class.WebConfig.GetApp("TimeInterval");
config.TimeInterval = timeInterval.Equals("") ? 1000 : Convert.ToInt32(timeInterval);
config.TimeInterval = config.TimeInterval < 2 ? 2 : config.TimeInterval;
}

private void ReadEmailQuque(){
timer1.Enabled = true;
IList<EC_EmailList> list = EC_EmailListFactory.Instance().SelectListByTop(config.RecordCount);
if (list.Count == 0) return;

isRun = true;
for (int i = 0; i < list.Count; i++) {
emailQueue.Enqueue(list[i]);
}

for (int i = 0; i < config.AmountThread; i++) {
sendEmailThread[i] = new Thread(new ThreadStart(DoSendEmail));
sendEmailThread[i].Name = "Thread" + (i+1).ToString();
sendEmailThread[i].Start();
}
list = null;
}

private void DoSendEmail(){
while (true) {
EC_EmailList objMail;
lock(this){
if (emailQueue.Count>0) {
objMail = (EC_EmailList)emailQueue.Dequeue();
} else {
isRun = false;
return;
}
}

int mailID = (int)objMail.EmailID;
string strTo = objMail.To;
string strSubject = objMail.Subject;
string strBody = objMail.Body;
string strFrom = objMail.From;
string smtpServer = objMail.SmtpServer;
string userName = objMail.UserName;
string password = objMail.Password;

bool isTrue = SendMail(strTo, strSubject, strBody, strFrom, smtpServer, userName, password, "");

EC_EmailListFactory.Instance().DeleteByID(mailID);

}
}

public bool SendMail(string strTo, string strSubject, string strBody,
string strFrom, string smtpServer, string userName,
string password, string attachments) {
Email email = new Email();
string strSmtpServer = smtpServer.Length > 0 ? smtpServer : config.SmtpServer.Trim();
email.SmtpServer = strSmtpServer;
email.SmtpUserName = userName.Length > 0 ? userName : config.UserName.Trim();
email.SmtpPassword = password.Length > 0 ? password : config.Password.Trim();
email.SmtpPort = strSmtpServer.ToLower().Contains("gmail") ? "587" : "25";
email.EnableSsl = strSmtpServer.ToLower().Contains("gmail") ? true : false;
email.FromEmail = strFrom.Length > 0 ? strFrom : config.FromAddress.Trim();
email.Subject = strSubject;
email.Body = strBody;
email.Encoding = System.Text.Encoding.UTF8;
bool isSuccess = email.SmtpClientSend(strTo);
return isSuccess;
}
public void ErrorLog(string strMessage) {
lock(this){
StreamWriter sw = new StreamWriter(config.LogFile + "MailLog.txt", true);
sw.WriteLine(strMessage);
sw.Flush();
sw.Close();
}
}
}
}

曾经运行在MSN的MCLUB的服务器上跑发EMAIL的服务。应该是安全无死锁调用。

本文链接

MSSQL分页：一个高效的二分法TOP MAX/TOP MIN分页存贮过程

2010-08-19T02:42:00Z

--/*-----存储过程分页处理孙伟 2005-03-28创建 -------*/
--/*----- 对数据进行了2分处理使查询前半部分数据与查询后半部分数据性能相同 -------*/
--/*-----存储过程分页处理孙伟 2005-04-21修改添加Distinct查询功能-------*/
--/*-----存储过程分页处理孙伟 2005-05-18修改多字段排序规则问题-------*/
--/*-----存储过程分页处理孙伟 2005-06-15修改多字段排序修改-------*/
--/*-----存储过程分页处理孙伟 2005-12-13修改修改数据分页方式为top max模式性能有极大提高-------*/
--/*-----缺点：相对之前的not in版本主键只能是整型字段,如主键为GUID类型请使用not in 模式的版本-------*/

CREATE PROCEDURE [dbo].[getPagerTopMAX] (
    @tblName     nvarchar(2000),           ----要显示的表或多个表的连接,如："myTable"
    @ID        nvarchar(150),            ----主表的主键，如："id"
    @page        int = 1,                ----要显示那一页的记录
    @pageSize    int = 10,                ----每页显示的记录个数
    @fldName     nvarchar(500) = '*',        ----要显示的字段列表,如："id, cdsinger, cdsingertype, area, cdsingerreadme"
    @fldSort    nvarchar(200) = @ID,       ----排序字段列表或条件
    @Sort        bit = 1,                ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ')
    @strCondition    nvarchar(1000) = null, ----查询条件,不需where,如："and a=1 and b=2"
    @Dist                 bit = 0,          ----是否添加查询字段的 DISTINCT 默认0不添加/1添加
    @Counts    int = 1 output,              ----查询到的记录数
    @pageCount    int = 1 output            ----查询结果分页后的总页数
) AS begin
    SET NOCOUNT ON
    Declare @sqlTmp nvarchar(3000)           ----存放动态生成的SQL语句
    Declare @strTmp nvarchar(3000)            ----存放取得查询结果总数的查询语句
    Declare @strID     nvarchar(3000)       ----存放取得查询开头或结尾ID的查询语句

    Declare @strSortType nvarchar(10)        ----数据排序规则A
    Declare @strFSortType nvarchar(10)        ----数据排序规则B

    Declare @SqlSelect nvarchar(50)         ----对含有DISTINCT的查询进行SQL构造
    Declare @SqlCounts nvarchar(50)         ----对含有DISTINCT的总数查询进行SQL构造

    if @Dist  = 0
    begin
        set @SqlSelect = 'select '
        set @SqlCounts = 'Count(*)'
    end
    else
    begin
        set @SqlSelect = 'select distinct '
        set @SqlCounts = 'Count(DISTINCT '+@ID+')'
    end

    if @Sort=0
    begin
        set @strFSortType=' ASC '
        set @strSortType=' DESC '
    end
    else
    begin
        set @strFSortType=' DESC '
        set @strSortType=' ASC '
    end

    --------生成查询语句--------

    --此处@strTmp为取得查询结果数量的语句
    if @strCondition is null or @strCondition=''     --没有设置显示条件
    begin
        set @sqlTmp =  @fldName + ' From ' + @tblName
        set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName
        set @strID = ' From ' + @tblName
    end
    else
    begin
        set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition
        set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition
        set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition
    end

    ----取得查询结果总数量-----
    exec sp_executesql @strTmp,N'@Counts int out ',@Counts out
    declare @tmpCounts int
    if @Counts = 0
        set @tmpCounts = 1
    else
        set @tmpCounts = @Counts

        --取得分页总数
        set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize

        /**//**当前页大于总页数取最后一页**/
        if @page>@pageCount
            set @page=@pageCount

        --/*-----数据分页2分处理-------*/
        declare @pageIndex int --总数/页大小
        declare @lastcount int --总数%页大小

        set @pageIndex = @tmpCounts/@pageSize
        set @lastcount = @tmpCounts%@pageSize
        if @lastcount > 0
            set @pageIndex = @pageIndex + 1
        else
            set @lastcount = @pagesize

        --//***显示分页
        if @strCondition is null or @strCondition=''     --没有设置显示条件
        begin
            if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
                begin
                    if @page=1
                        set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' order by '+ @fldSort +' '+ @strFSortType
                    else
                    begin
                        set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
                            +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'
                            +' order by '+ @fldSort +' '+ @strFSortType
                    end
                end
            else
                begin
                set @page = @pageIndex-@page+1 --后半部分数据处理
                    if @page <= 1 --最后一页数据显示
                        set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
                    else
                        set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
                            +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'
                            +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
                end
        end

        else --有查询条件
        begin
            if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
            begin
                    if @page=1
                        set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType
                    else
                    begin
                        set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
                            +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'
                            +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType
                    end
            end
            else
            begin
                set @page = @pageIndex-@page+1 --后半部分数据处理
                if @page <= 1 --最后一页数据显示
                        set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
                else
                        set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(20))+' '+ @fldName+' from '+@tblName
                            +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
                            +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'
                            +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
            end
        end

    ------返回查询结果-----
    --print @strTmp
    exec (@strTmp)

    SET NOCOUNT OFF

end

本文链接

C#.NET Object扩展 ToJson/Serialize/Deserialize

2010-08-18T00:55:00Z

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Data;
using System.Data.Common;
using System.Web.Script.Serialization;
using System.IO;
using System.Security.Cryptography;
using System.ComponentModel;
using System.Runtime.Serialization.Formatters.Binary;
using System.Xml.Serialization;

namespace Pub.Class {
public static class ObjectExtensions {

public static string ToJson(this object obj){
return ToJson(obj, null);
}
public static string ToJson(this object obj, IEnumerable<JavaScriptConverter> jsonConverters) {
JavaScriptSerializer serializer = new JavaScriptSerializer();
if (jsonConverters != null) serializer.RegisterConverters(jsonConverters ?? new JavaScriptConverter[0]);
return serializer.Serialize(obj);
}

public static T ConvertTo<T>(this object value) { return value.ConvertTo(default(T)); }
public static T ConvertTo<T>(this object value, T defaultValue) {
if(value != null) {
var targetType = typeof(T);

var converter = TypeDescriptor.GetConverter(value);
if(converter != null) {
if(converter.CanConvertTo(targetType)) return (T) converter.ConvertTo(value, targetType);
}

converter = TypeDescriptor.GetConverter(targetType);
if(converter != null) {
try { if(converter.CanConvertFrom(value.GetType())) return (T) converter.ConvertFrom(value); } catch {}
}
}
return defaultValue;
}
public static T ConvertTo<T>(this object value, T defaultValue, bool ignoreException) {
if(ignoreException) {
try {
return value.ConvertTo<T>();
}
catch {
return defaultValue;
}
}
return value.ConvertTo<T>();
}

public static int ToInt(this object strValue, int defValue) { int def = 0; int.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static byte ToTinyInt(this object strValue, byte defValue) { byte def = 0; byte.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static short ToSmallInt(this object strValue, short defValue) { short def = 0; short.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static decimal ToDecimal(this object strValue, decimal defValue) { decimal def = 0; decimal.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static float ToFloat(this object strValue, float defValue) { float def = 0; float.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static Int64 ToBigInt(this object strValue, Int64 defValue) { Int64 def = 0; Int64.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static decimal ToMoney(this object strValue, decimal defValue) { decimal def = 0; decimal.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static int ToInteger(this object strValue, int defValue) { int def = 0; int.TryParse(strValue.ToString(), out def); return def == 0 ? defValue : def; }
public static bool ToBool(this object Expression, bool defValue) {
if (Expression != null) {
if (string.Compare(Expression.ToString(), "true", true) == 0) return true;
if (string.Compare(Expression.ToString(), "false", true) == 0) return false;
if (string.Compare(Expression.ToString(), "1", true) == 0) return true;
if (string.Compare(Expression.ToString(), "0", true) == 0) return false;
}
return defValue;
}
public static int ToInt(this object strValue) { return strValue.ToInt(0); }
public static byte ToTinyInt(this object strValue) { return strValue.ToTinyInt(0); }
public static short ToSmallInt(this object strValue) { return strValue.ToSmallInt(0); }
public static decimal ToDecimal(this object strValue) { return strValue.ToDecimal(0); }
public static float ToFloat(this object strValue) { return strValue.ToFloat(0); }
public static Int64 ToBigInt(this object strValue) { return strValue.ToBigInt(0); }
public static decimal ToMoney(this object strValue) { return strValue.ToMoney(0); }
public static int ToInteger(this object strValue) { return strValue.ToInteger(0); }
public static bool ToBool(this object strValue) { return strValue.ToBool(false); }

public static object InvokeMethod(this object obj, string methodName, params object[] parameters) {
return InvokeMethod<object>(obj, methodName, parameters);
}
public static T InvokeMethod<T>(this object obj, string methodName) {
return InvokeMethod<T>(obj, methodName, null);
}
public static T InvokeMethod<T>(this object obj, string methodName, params object[] parameters) {
var type = obj.GetType();
var method = type.GetMethod(methodName);

if(method == null) throw new ArgumentException(string.Format("Method '{0}' not found.", methodName), methodName);

var value = method.Invoke(obj, parameters);
return (value is T ? (T) value : default(T));
}

public static object GetPropertyValue(this object obj, string propertyName) {
return GetPropertyValue<object>(obj, propertyName, null);
}
public static T GetPropertyValue<T>(this object obj, string propertyName) {
return GetPropertyValue<T>(obj, propertyName, default(T));
}
public static T GetPropertyValue<T>(this object obj, string propertyName, T defaultValue) {
var type = obj.GetType();
var property = type.GetProperty(propertyName);

if(property == null) throw new ArgumentException(string.Format("Property '{0}' not found.", propertyName), propertyName);

var value = property.GetValue(obj, null);
return (value is T ? (T) value : defaultValue);
}
public static void SetPropertyValue(this object obj, string propertyName, object value) {
var type = obj.GetType();
var property = type.GetProperty(propertyName);

if(property == null) throw new ArgumentException(string.Format("Property '{0}' not found.", propertyName), propertyName);

property.SetValue(obj, value, null);
}

public static T GetAttribute<T>(this object obj) where T : Attribute {
return GetAttribute<T>(obj, true);
}
public static T GetAttribute<T>(this object obj, bool includeInherited) where T : Attribute {
var type = (obj as Type ?? obj.GetType());
var attributes = type.GetCustomAttributes(typeof(T), includeInherited);
if((attributes != null) && (attributes.Length > 0)) {
return (attributes[0] as T);
}
return null;
}

public static IEnumerable<T> GetAttributes<T>(this object obj) where T : Attribute {
return GetAttributes<T>(obj);
}
public static IEnumerable<T> GetAttributes<T>(this object obj, bool includeInherited) where T : Attribute {
var type = (obj as Type ?? obj.GetType());
foreach(var attribute in type.GetCustomAttributes(typeof(T), includeInherited)) {
if(attribute is T) yield return (T) attribute;
}
}

public static bool IsType(this object obj, Type type) {
return obj.GetType().Equals(type);
}
public static T ToType<T>(this object value) { return (T)value; }
public static bool IsArray(this object obj) {
return obj.IsType(typeof(System.Array));
}
public static bool IsDBNull(this object obj) {
return obj.IsType(typeof(DBNull));
}

public static byte[] Serialize(this object value) {
MemoryStream ms = new MemoryStream();
BinaryFormatter bf1 = new BinaryFormatter();
bf1.Serialize(ms, value);
return ms.ToArray();
}

public static void CheckOnNull(this object @this, string parameterName) {
if(@this.IsNull()) throw new ArgumentNullException(parameterName);
}
public static void CheckOnNull(this object @this, string parameterName, string message) {
if(@this.IsNull()) throw new ArgumentNullException(parameterName, message);
}
public static bool IsNull(this object @this) {
return @this == null;
}
public static bool IsNotNull(this object @this) {
return !@this.IsNull();
}
public static T UnsafeCast<T>(this object value) {
return value.IsNull() ? default(T) : (T)value;
}
public static T SafeCast<T>(this object value) {
return value is T ? value.UnsafeCast<T>() : default(T);
}
public static bool InstanceOf<T>(this object value) {
return value is T;
}

public static void SerializeXmlFile(this object o, string fileName) {
XmlSerializer serializer = new XmlSerializer(o.GetType());
if (!FileFolder.FileExists(fileName)) return;
using (FileStream stream = new FileStream(fileName, FileMode.Create, FileAccess.Write)) serializer.Serialize(stream, o);
}
public static T DeserializeXmlFile<T>(string fileName) {
T o;
XmlSerializer serializer = new XmlSerializer(typeof(T));
using (FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read)) o = (T)serializer.Deserialize(stream);
return o;
}

public static string SerializeXml(this object o) {
XmlSerializer serializer = new XmlSerializer(o.GetType());
StringBuilder stringBuilder = new StringBuilder();
using (TextWriter textWriter = new StringWriter(stringBuilder)) serializer.Serialize(textWriter, o);
return stringBuilder.ToString();
}
public static T DeserializeXml<T>(this string xml) {
return (T)Deserialize(xml, typeof(T));
}
public static object Deserialize(string xml, Type type) {
object o;
XmlSerializer serializer = new XmlSerializer(type);
using (TextReader textReader = new StringReader(xml)) o = serializer.Deserialize(textReader);
return o;
}

public static void Write(this object o) { Msg.Write(o); }
public static void WriteEnd(this object o) { Msg.WriteEnd(o); }
}
}

本文链接

C#.NET IDataReader扩展 ToList<T>/Get<T>

2010-08-16T13:02:00Z

调用实例：

public virtual IList<EC_Type> SelectListByAll(string order, string fieldList, bool useCache) {
string cacheKey = string.Format("EC_TypeCache_SelectListByAll_{0}_{1}", order, fieldList); IList<EC_Type> list = null;
if (useCache) {
list = (IList<EC_Type>)Cache2.Get(cacheKey);
if (list != null) return list;
}

DbParameter[] dbParams = {
Data.MakeInParam("@Fields", (DbType)SqlDbType.VarChar, 1000, fieldList),
Data.MakeInParam("@Order", (DbType)SqlDbType.VarChar, 100, order),
};
list = Data.GetDbDataReader("EC_Type_SelectListByAll", dbParams).ToList<EC_Type>();
if (useCache) Cache2.Insert(cacheKey, list, cacheSeconds);
return list;
}

本文链接

JS/CSS 压缩工具集closure_packer_yui_compiler

2010-08-14T13:11:00Z

下载地址：http://files.cnblogs.com/livexy/closure_packer_yui_compiler.rar

文件列表：

install.cmd 是安装文件，运行即可。

uninstall.cmd 是卸载文件，运行即可。

功能：

1，支持右击JS/CSS文件，选择

直接压缩。先用compiler.jar压缩，在用packer.exe压缩，如果第二次压比第一次压缩大在调用一次compiler.jar压缩。

CSS压缩用yuicompressor-2.4.2.jar，需要安装JAVA运行环境jre。

2，支持VS2008 Addin，可选择JS/CSS文件右击压缩，还可在编辑器里直接右击压缩。

如果VS2008出现二次Closure Packer YUI Compiler菜单项，需要关掉VS，运行uninstall.cmd 是卸载文件，然后在重新安装，可解决问题。

本文链接

web开发注意事项

2010-08-12T14:17:00Z

web开发注意事项

一、Web开发注意事项

l 输出JSON问题。

拼接JSON字符串，有些特殊字符需要替换掉源代码：

public static string ToJson(this string s) {

StringBuilder sb = new StringBuilder();

for (int i = 0; i < s.Length; i++) {

char c = s.ToCharArray()[i];

switch (c) {

case '\"': sb.Append("\\\""); break;

case '\\': sb.Append("\\\\"); break;

case '/': sb.Append("\\/"); break;

case '\b': sb.Append("\\b"); break;

case '\f': sb.Append("\\f"); break;

case '\n': sb.Append("\\n"); break;

case '\r': sb.Append("\\r"); break;

case '\t': sb.Append("\\t"); break;

default: sb.Append(c); break;

}

return sb.ToString();

}

如果未替换这些特殊字符生成的JSON不会被正确解析。

推荐使用NET提供的JavaScriptSerializer对象生成JSON字符串。

源代码：

public static string ToJson(this object obj){

return ToJson(obj, null);

}

public static string ToJson(this object obj, IEnumerable<JavaScriptConverter> jsonConverters) {

JavaScriptSerializer serializer = new JavaScriptSerializer();

if (jsonConverters != null) serializer.RegisterConverters(jsonConverters ?? new JavaScriptConverter[0]);

return serializer.Serialize(obj);

}

l XXS攻击。

这篇文章很全面：http://ha.ckers.org/xss.html

数据从数据库读出来显示的时候一定要过滤。源代码：

public static string UnHtml(this string htmlStr) {

if (string.IsNullOrEmpty(htmlStr)) return string.Empty;

return htmlStr.Replace("\"", "\\\"").ShowXmlHtml().Replace(" ", " ").Replace("\n", "<br />");

}

public static string ShowXmlHtml(this string htmlStr) {

if (string.IsNullOrEmpty(htmlStr)) return string.Empty;

string str = htmlStr.Replace("&", "&").Replace(">", ">").Replace("<", "<");

return str;

}

存在此漏洞别人可挂马/记录键盘操作，并发送到指定的信箱/可弹广告/==。

l Cookie/Session/ViewState数据存放需要加密。

代码请参考：

C#.NET COOKIE操作 KEY使用MD5加密，Value使用AES加密

http://www.cnblogs.com/livexy/archive/2010/07/05/1771286.html

C#.Net Session操作 Key使用MD5加密，Value使用DES加密

http://www.cnblogs.com/livexy/archive/2010/07/05/1771288.html

C#.NET 加密解密：AES/DES/Base64/RSA/MD5/SHA256

http://www.cnblogs.com/livexy/archive/2010/07/05/1771285.html

l 上传图片漏洞。

这种漏洞的主要解决办法是：让图片目录无执行权限。

将图片目录放在非站点下。建一个独立站点指向图片目录。

IIS7处理程序映射：

IIS6需要设置：只读和无执行权限。禁用所有Web服务扩展。

l 备份文件时的小漏洞，备份重要文件时扩展名不要使用.bak/.txt之类的，防止别人下载。备份文件请不要上传到服务器。

l 登录漏洞

验证用户是否登录最好的作法是，先按登录名，从数据库查询到用户的ID和密码。在代码里比较登录密码是否正确。不要直接查询用户名和密码在表里是否存在。

l 防止页面被另存为

HTML代码里加：<NOSCRIPT><IFRAME SRC="*.html"></IFRAME></NOSCRIPT>

l 防止页面被内嵌到别人的网站

HTML代码里加：<script>if (self != top) { top.location = self.location; }</script>

l 防止从本地提交数据

在POST/GET数据的时候，我们需要验证页面的referrer。如果referrer非本地的域名不让访问。这样可防止从其它站点或本地提交数据。

l 前台JS验证数据，提交到程序里也需要验证数据。做双保险才安全。

l 防无限刷新

数据提交的时候让按钮变灰不让再次单击。

提交成功后，用JS提示操作成功，并转向新页面。这样做每次对方刷新都要点确定按钮。可以减少刷新次数。

l 防无限提交数据/防ajax自动提交数据

加入验证码和提交时间（如一分种发信息）限制功能。

二、数据库开发注意事项

l 删除sa用户，新建一个权限为sa的用户，用户名和密码一样要复杂。以防暴力破解。新建一个web连接用户，去掉所有服务器角色，在用户映射中加入此用户要操作的数据库db_owner和db_public身份。如果需要其它操作要另加权限（如只加insert/delete/select/update）。

l 防SQL注入

存在SQL注入很严重。db_public身份一样能对数据库表有添加/修改/删除权限。

推荐使用Parameter传值，不要使用字符串拼接。

如果需要拼接需要过滤一些特殊字符，代码如下：

public static string SafeSql(this string str) {

str = str.IsNullOrEmpty() ? "" : str.Replace("'", "''");

str = new Regex("exec", RegexOptions.IgnoreCase).Replace(str, "exec");

str = new Regex("xp_cmdshell", RegexOptions.IgnoreCase).Replace(str, "xp_cmdshell");

str = new Regex("select", RegexOptions.IgnoreCase).Replace(str, "select");

str = new Regex("insert", RegexOptions.IgnoreCase).Replace(str, "insert");

str = new Regex("update", RegexOptions.IgnoreCase).Replace(str, "update");

str = new Regex("delete", RegexOptions.IgnoreCase).Replace(str, "delete");

str = new Regex("drop", RegexOptions.IgnoreCase).Replace(str, "drop");

str = new Regex("create", RegexOptions.IgnoreCase).Replace(str, "create");

str = new Regex("rename", RegexOptions.IgnoreCase).Replace(str, "rename");

str = new Regex("truncate", RegexOptions.IgnoreCase).Replace(str, "truncate");

str = new Regex("alter", RegexOptions.IgnoreCase).Replace(str, "alter");

str = new Regex("exists", RegexOptions.IgnoreCase).Replace(str, "exists");

str = new Regex("master.", RegexOptions.IgnoreCase).Replace(str, "master.");

str = new Regex("restore", RegexOptions.IgnoreCase).Replace(str, "restore");

return str;

}

要使用sp_executesql不要使用：exec

l select/insert/delete/update操作时需要注意：

当前用户只能查看，添加，删除，更新自己的数据。在操作的时候一定要判断是不是指定的用户可以操作。有很多新人写程序的时候没有做过处理，会出现当前用户可以删除别人的数据。

删除我的博文ID=1的SQL代码：delete from blog where blogID=1这样是有问题的，应该这么写：delete from blog where blogID=1 and userid=当前登录的用户ID。同样查询，修改，更新也存在这样的问题。

三、自我测试需要注意

l 想象每一个函数/方法调用尽可能存在的情况。

l 测试所有按钮/链接/图片是否可点，链接地址是否正确，是否存在无效链接。

l 每一个可输入控件都要输入特殊字符去测试。每一个URL参数都要输入特殊字符去测试。

特殊字符：

‘

“

or 1=1

or 1=2

''%' or 1=1;--

\r\n

l 界面是否美观/颜色是否刺眼/哪里可以改进。

l 提交数据是否可刷新多次提交。多次快速连续点击保存，保存按钮是否可用，是否已多次提交数据。

l 是否可查看，修改，删除，更新别人的个人资料或私密信息。

l 是否可被内嵌/是否可被另存为/是否有登录漏洞/是否可本地提交数据/程序是否验证数据的格式、安全性和恶意性

2010-07-15

email:cexo255@163.com

MSN:cexo255@hotmail.com

本文链接