博客园_加油

AccessSchema

2011-05-22T00:49:00Z

internal class AccessSchema

{

private Field GetAccessField(string connectionString, string tbName, DataRow r)

{

Field field = new Field();

field.AllowNull = ObjectHelper.GetBool(r["IS_NULLABLE"]);

field.DefaultValue = ObjectHelper.GetString(r["COLUMN_DEFAULT"]);

field.FieldDescn = ObjectHelper.GetString(r["DESCRIPTION"]);

field.FieldLength = ObjectHelper.GetInt(r["CHARACTER_MAXIMUM_LENGTH"]);

field.FieldName = ObjectHelper.GetString(r["COLUMN_NAME"]);

field.FieldNumber = ObjectHelper.GetInt(r["ORDINAL_POSITION"]);

field.FieldSize = ObjectHelper.GetInt(r["CHARACTER_OCTET_LENGTH"]);

field.OleDbTypeString = ObjectHelper.GetString(r["DATA_TYPE"]);

DataTable table = this.GetDbSchema(connectionString, OleDbSchemaGuid.Primary_Keys, null);

foreach (DataRow row in table.Rows)

{

if ((row[2].ToString() == tbName) && (row[3].ToString() == field.FieldName))

{

field.IsKeyField = true;

field.IsIdentifier = true;

}

field.TableName = ObjectHelper.GetString(r["TABLE_NAME"]);

return field;

}

private DataTable GetDbSchema(string connString, Guid schema, object[] restrictions)

{

OleDbConnection connection = new OleDbConnection(connString);

connection.Open();

DataTable oleDbSchemaTable = connection.GetOleDbSchemaTable(schema, restrictions);

connection.Close();

return oleDbSchemaTable;

}

public bool GetSchema(Database database)

{

try

{

object[] restrictions = new object[4];

restrictions[3] = "table";

DataTable table = this.GetDbSchema(database.ConnectionString, OleDbSchemaGuid.Tables, restrictions);

foreach (DataRow row in table.Rows)

{

Table table2 = new Table();

table2.Name = row["TABLE_NAME"].ToString();

restrictions = new object[3];

restrictions[2] = table2.Name;

DataTable table3 = this.GetDbSchema(database.ConnectionString, OleDbSchemaGuid.Columns, restrictions);

foreach (DataRow row2 in table3.Rows)

{

table2.Fields.Add(this.GetAccessField(database.ConnectionString, table2.Name, row2));

}

database.Tables.Add(table2);

}

DataTable table4 = this.GetDbSchema(database.ConnectionString, OleDbSchemaGuid.Views, null);

foreach (DataRow row3 in table4.Rows)

{

database.Views.Add(row3["TABLE_NAME"].ToString());

}

DataTable table5 = this.GetDbSchema(database.ConnectionString, OleDbSchemaGuid.Procedures, null);

foreach (DataRow row4 in table5.Rows)

{

database.StoreProcedures.Add(row4["PROCEDURE_NAME"].ToString());

}

return true;

}

catch

{

return false;

}

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MySqlSchema

2011-05-22T00:47:00Z

internal class MySqlSchema

{

public bool GetSchema(Database database)

{

string str;

string connectionString = database.ConnectionString;

Match match = Regex.Match(connectionString, @"Database=(?<Database>[^\;]*);");

if (match.Success)

{

str = match.Groups["Database"].Value;

connectionString = connectionString.Replace(string.Format("Database={0};", str), "Database=information_schema;");

}

else

{

return false;

}

DBHelper helper = new DBHelper(DBHelper.DatabaseTypes.MySql, connectionString);

try

{

DataSet set = helper.ExecuteQuery(CommandType.Text, string.Format("select distinct TABLE_NAME from information_schema.TABLES where TABLE_SCHEMA='{0}' and TABLE_TYPE='BASE TABLE'", str), null);

foreach (DataRow row in set.Tables[0].Rows)

{

string str3 = row[0].ToString();

Table table = new Table();

table.Name = str3;

DataSet set2 = helper.ExecuteQuery(CommandType.Text, string.Format("select * from COLUMNS where TABLE_SCHEMA='{0}' and TABLE_NAME='{1}'", str, str3), null);

foreach (DataRow row2 in set2.Tables[0].Rows)

{

Field field = new Field();

field.AllowNull = row2["IS_NULLABLE"].ToString().ToLower() == "yes";

field.MySqlTypeString = ObjectHelper.GetString(row2["DATA_TYPE"]);

field.DefaultValue = ObjectHelper.GetString(row2["COLUMN_DEFAULT"]);

field.FieldDescn = ObjectHelper.GetString(row2["COLUMN_COMMENT"]);

field.FieldLength = ObjectHelper.GetLong(row2["CHARACTER_MAXIMUM_LENGTH"]);

field.FieldName = ObjectHelper.GetString(row2["COLUMN_NAME"]);

field.FieldNumber = ObjectHelper.GetInt(row2["ORDINAL_POSITION"]);

table.Fields.Add(field);

}

database.Tables.Add(table);

}

DataSet set3 = helper.ExecuteQuery(CommandType.Text, string.Format("select distinct TABLE_NAME from information_schema.TABLES where TABLE_SCHEMA='{0}' and TABLE_TYPE='VIEW'", str), null);

foreach (DataRow row3 in set3.Tables[0].Rows)

{

database.Views.Add(row3[0].ToString());

}

DataSet set4 = helper.ExecuteQuery(CommandType.Text, string.Format("select distinct SPECIFIC_NAME from ROUTINES where ROUTINE_SCHEMA='{0}'", str), null);

foreach (DataRow row3 in set4.Tables[0].Rows)

{

database.StoreProcedures.Add(row3[0].ToString());

}

return true;

}

catch

{

return false;

}

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SQL Schema

2011-05-22T00:43:00Z

internal class SqlSchema

{

private string SqlForGetStoreProcedures = "select distinct(name) from sysobjects where type='p' ";

public string SqlForGetViews = "select distinct(name) from sysobjects where type='v' ";

private Database.DatabaseType type;

public bool GetSchema(Database database)

{

bool flag;

using (new SqlConnection())

{

try

{

this.type = database.Type;

DBHelper helper = new DBHelper(DBHelper.DatabaseTypes.Sql, database.ConnectionString);

DataSet ds = helper.ExecuteQuery(CommandType.Text, this.SqlForGetTable, null);

database.Tables = this.GetSQLTableList(ds);

ds = helper.ExecuteQuery(CommandType.Text, this.SqlForGetViews, null);

database.Views = this.GetSQLViewList(ds);

ds = helper.ExecuteQuery(CommandType.Text, this.SqlForGetStoreProcedures, null);

database.StoreProcedures = this.GetSQLStoreProcedureList(ds);

flag = true;

}

catch

{

flag = false;

}

return flag;

}

private Field GetSQLField(DataRow r)

{

Field field = new Field();

field.AllowNull = ObjectHelper.GetBool(r["AllowNull"]);

field.DefaultValue = ObjectHelper.GetString(r["DefaultValue"]);

field.FieldDescn = ObjectHelper.GetString(r["FieldDescn"]);

field.FieldLength = ObjectHelper.GetInt(r["FieldLength"]);

field.FieldName = ObjectHelper.GetString(r["FieldName"]);

field.FieldNumber = ObjectHelper.GetInt(r["FieldNumber"]);

field.FieldSize = ObjectHelper.GetInt(r["FieldSize"]);

field.SqlTypeString = ObjectHelper.GetString(r["FieldType"]);

field.IsIdentifier = ObjectHelper.GetBool(r["IsIdentifier"]);

field.IsKeyField = ObjectHelper.GetBool(r["IsKeyField"]);

field.TableName = ObjectHelper.GetString(r["TableName"]);

return field;

}

private List<string> GetSQLStoreProcedureList(DataSet ds)

{

List<string> list = new List<string>();

foreach (DataRow row in ds.Tables[0].Rows)

{

list.Add(row[0].ToString());

}

return list;

}

private List<Table> GetSQLTableList(DataSet ds)

{

DataTable table = ds.Tables[0];

List<Table> list = new List<Table>();

foreach (DataRow row in table.Rows)

{

Field sQLField = this.GetSQLField(row);

bool flag = false;

foreach (Table table2 in list)

{

if (sQLField.TableName == table2.Fields[0].TableName)

{

table2.Fields.Add(sQLField);

flag = true;

break;

}

if (!flag)

{

Table table3 = new Table();

table3.Name = sQLField.TableName;

List<Field> list2 = new List<Field>();

list2.Add(sQLField);

table3.Fields = list2;

list.Add(table3);

}

return list;

}

private List<string> GetSQLViewList(DataSet ds)

{

List<string> list = new List<string>();

foreach (DataRow row in ds.Tables[0].Rows)

{

list.Add(row[0].ToString());

}

return list;

}

private string SqlForGetTable

{

get

{

StringBuilder builder = new StringBuilder();

builder.Append("SELECT d.name N'TableName',a.colorder N'FieldNumber',a.name N'FieldName', ");

builder.Append("(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '1'else '0' end) N'IsIdentifier',");

builder.Append("(case when (SELECT count(*) ");

builder.Append(" FROM sysobjects WHERE (name in (SELECT name FROM sysindexes ");

builder.Append(" WHERE (id = a.id) AND (indid in (SELECT indid FROM sysindexkeys");

builder.Append(" WHERE (id = a.id) AND (colid in (SELECT colid FROM syscolumns");

builder.Append(" WHERE (id = a.id) AND (name = a.name))))))) AND (xtype = 'PK'))>0 ");

builder.Append(" then '1' else '0' end) N'IsKeyField', b.name N'FieldType',a.length N'FieldSize', ");

builder.Append(" COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'FieldLength', ");

builder.Append(" isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'DecimalDigits', ");

builder.Append(" (case when a.isnullable=1 then '1'else '0' end) N'AllowNull', isnull(e.text,'') N'DefaultValue', ");

builder.Append(" isnull(g.[value],'') AS N'FieldDescn' ");

builder.Append(" FROM syscolumns a left join systypes b on a.xtype=b.xusertype inner join sysobjects d ");

builder.Append(" on a.id=d.id and d.xtype='U' and d.name<>'dtproperties' left join syscomments e on a.cdefault=e.id ");

if (this.type == Database.DatabaseType.Sql2005)

{

builder.Append(" left join sys.extended_properties g on a.id=g.major_id AND a.colid = g.minor_id order by object_name(a.id),a.colorder");

}

else

{

builder.Append(" left join sysproperties g on a.id=g.id AND a.colid = g.smallid order by object_name(a.id),a.colorder ");

}

return builder.ToString();

}

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配置错误定义了重复的“system.web.extensions/scripting/scriptResourceHandler” 解决办法

2011-03-29T03:21:00Z

在装有vs2010的window7系统上运行vs2008的网站，会提示“错误代码 0x800700b7 配置错误定义了重复的“system.web.extensions/scripting/scriptResourceHandler””。

这个问题原因在于window7的IIS默认用的是ASP.NET v4.0应用程序池。

解决方法：新建一个ASP.NET v2.0的应用程序池。把vs2008的网站建在这个ASP.NET v2.0的应用程序池上就可以解决这个问题。

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Sql Server 合并行

2011-03-28T08:42:00Z

Sql 合并行

如下：

ID	Name
1	Tom
1	John
2	Carrier
2	Wendy
1	Rick

要求显示下列结果

ID	Name
1	Tom,John,Rick
2	Carrier,Wendy

Sql:

select id,

（SELECT STUFF(b.v.value('/r[1]','varchar(100)'),1,1,'')

FROM

(SELECT v=(

SELECT ',' + Name

FROM TableName

where id=c.id

FOR XML PATH(''),ROOT('r'),TYPE

)) b） as Name

from TableName c

group by id

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HTTP 错误 404.2 – Not Found

2011-03-24T01:27:00Z

HTTP 错误 404.2 – Not Found. 由于 Web 服务器上的“ISAPI 和 CGI 限制”列表设置，无法提供您请求的页面.

详细错误：HTTP 错误 404.2 – Not Found. 由于 Web 服务器上的“ISAPI 和 CGI 限制”列表设置，无法提供您请求的页面.

出现环境：win7 + IIS7.5

解决办法：IIS的根节点->右侧“ISAPI和CGI限制”->把禁止的DotNet版本项设置为允许，即可

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重新安装IIS

2011-03-23T08:01:00Z

在visual studio tools\visual studio 命令行执行 aspnet_regiis -i

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[转]如何捕捉WEB窗体关闭事件

2011-03-16T00:47:00Z

原帖地址：http://community.csdn.net/Expert/topic/5030/5030429.xml?temp=1.928347E-02

一直以来用户非正常退出系统即：用户按右上角的 X 按纽后

服务器端 session 无法销毁！一直要等到其过期时间到了才销毁这样通过session进行在线人
数统计就无法准确了！

我今天试了才发现其实关闭浏览器事件可以捕捉到的那么我们就可以在关闭事件里调用Session.Abandon();了

（我下面这个例子特别适合页面是框架结构信息管理系统，因为这个样的结构都有一个公用的主框架页面）

废话少说！说正题！

main.aspx

1、<body onbeforeunload="LeaveWin()">
2 <head>之间加入！
    <script language=javascript>
    function LeaveWin()
    {
        //alert("您点击了关闭按纽右上角的");
        window.location.href = "../LoginOut.aspx";
    }
    </script>

LoginOut.aspx

3、LoginOut.aspx 的Page_Load里只有一句话
    protected void Page_Load(object sender, EventArgs e)
    {
        Session.Abandon();
    }

以上两个页面完成后如果不放心打开你的VS2003 或者 2005 在Session.Abandon();前设置断点开始调试

当关闭了main.aspx 后程序是可以运行到Session.Abandon();的！！太爽了！

如果再加个 xmlhttp 无刷新请求，变态点 1秒刷一次！那可正的象实时一样了！

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C#获取存储过程返回值和输出参数值

2011-03-16T00:46:00Z

1.获取Return返回值

程序代码

//存储过程
//Create PROCEDURE MYSQL
//     @a int,
//     @b int
//AS
//     return @a + @b
//GO
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString());
conn.Open();
SqlCommand MyCommand = new SqlCommand("MYSQL", conn);
MyCommand.CommandType = CommandType.StoredProcedure;
MyCommand.Parameters.Add(new SqlParameter("@a", SqlDbType.Int));
MyCommand.Parameters["@a"].Value = 10;
MyCommand.Parameters.Add(new SqlParameter("@b", SqlDbType.Int));
MyCommand.Parameters["@b"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@return", SqlDbType.Int));
MyCommand.Parameters["@return"].Direction = ParameterDirection.ReturnValue;
MyCommand.ExecuteNonQuery();
Response.Write(MyCommand.Parameters["@return"].Value.ToString());

2.获取Output输出参数值

程序代码

//存储过程
//Create PROCEDURE MYSQL
//     @a int,
//     @b int,
//     @c int output
//AS
//     Set @c = @a + @b
//GO
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString());
conn.Open();
SqlCommand MyCommand = new SqlCommand("MYSQL", conn);
MyCommand.CommandType = CommandType.StoredProcedure;
MyCommand.Parameters.Add(new SqlParameter("@a", SqlDbType.Int));
MyCommand.Parameters["@a"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@b", SqlDbType.Int));
MyCommand.Parameters["@b"].Value = 20;
MyCommand.Parameters.Add(new SqlParameter("@c", SqlDbType.Int));
MyCommand.Parameters["@c"].Direction = ParameterDirection.Output;
MyCommand.ExecuteNonQuery();
Response.Write(MyCommand.Parameters["@c"].Value.ToString());

---------------------------------------------------------------------------------------------------------------

以下代码转自网络：

C#接收存储过程返回值:

public static int User_Add(User us)
     {
         int iRet;
         SqlConnection conn = new SqlConnection(Conn_Str);
         SqlCommand cmd = new SqlCommand("User_Add", conn);
         cmd.CommandType = CommandType.StoredProcedure;
         cmd.Parameters.AddWithValue("@UName", us.UName);
         cmd.Parameters.AddWithValue("@UPass", us.UPass);
         cmd.Parameters.AddWithValue("@PassQuestion", us.PassQuestion);
         cmd.Parameters.AddWithValue("@PassKey", us.PassKey);
         cmd.Parameters.AddWithValue("@Email", us.Email);
         cmd.Parameters.AddWithValue("@RName", us.RName);
         cmd.Parameters.AddWithValue("@Area", us.Area);
         cmd.Parameters.AddWithValue("@Address", us.Address);
         cmd.Parameters.AddWithValue("@ZipCodes", us.ZipCodes);
         cmd.Parameters.AddWithValue("@Phone", us.Phone);
         cmd.Parameters.AddWithValue("@QQ", us.QQ);
         cmd.Parameters.Add("@RETURN_VALUE", "").Direction = ParameterDirection.ReturnValue;
         try
         {
             conn.Open();
             cmd.ExecuteNonQuery();
             iRet = (int)cmd.Parameters["@RETURN_VALUE"].Value;
         }
         catch (SqlException ex)
         {
             throw ex;
         }
         finally
         {
             conn.Close();
         }
         return iRet;
     }

C#接收存储过程输出参数:

public static decimal Cart_UserAmount(int UID)
    {
        decimal iRet;
        SqlConnection conn = new SqlConnection(Conn_Str);
        SqlCommand cmd = new SqlCommand("Cart_UserAmount", conn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@UID", UID);
        cmd.Parameters.Add("@Amount", SqlDbType.Decimal).Direction=ParameterDirection.Output;
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            iRet = (decimal)cmd.Parameters["@Amount"].Value;
        }
        catch (SqlException ex)
        {
            throw ex;
        }
        finally
        {
            conn.Close();
        }
        return iRet;
    }

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windows7安装配置IIS7.5过程图解

2011-03-15T06:45:00Z

http://www.feiyan.info/341.html

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