博客园_Isabella

设置为自动启动的WindowService没有开机启动

2012-01-12T06:08:00Z

当我们的服务依赖其他的服务才能启动时，我们需要给它添加依存关系。

在你的serviceInstaller上点右键，选择属性，设置ServicesDependedOn.

当然你也可以在ProjectInstaller 的InitializeComponent方法里添加代码，例子如下：

this.serviceInstaller1.ServicesDependedOn = new string[] { "Eventlog", "WinMgmt","MMQ","Windows Management Instrumentation" };

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检测是否连网

2012-01-03T02:20:00Z

To check for a network connection in .NET 2.0 use this:

System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable()

To monitor a change in IP address or a change in network availability, use the events from the NetworkChange class:

System.Net.NetworkInformation.NetworkChange.NetworkAvailabilityChanged
System.Net.NetworkInformation.NetworkChange.NetworkAddressChanged

try
{
System.Net.IPHostEntry objIPHE = System.Net.Dns.GetHostEntry("www.google.com");

}
catch
{
MessageBox.Show ("...No Conn...");
}

---------

bool ConnectionExists()
{
try
{
System.Net.Sockets.TcpClient clnt=new System.Net.Sockets.TcpClient("www.google.com",80);
clnt.Close();
return true;
}
catch(System.Exception ex)
{
return false;
}

}

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C# WinForm 边框阴影窗体

2011-12-29T02:47:00Z

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace testWinForm
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            SetClassLong(this.Handle, GCL_STYLE, GetClassLong(this.Handle, GCL_STYLE) | CS_DropSHADOW); //API函数加载，实现窗体边框阴影效果
        }
        #region 窗体边框阴影效果变量申明

        const int CS_DropSHADOW = 0x20000;
        const int GCL_STYLE = (-26);
        //声明Win32 API
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int SetClassLong(IntPtr hwnd, int nIndex, int dwNewLong);
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int GetClassLong(IntPtr hwnd, int nIndex);

        #endregion
        private void Form2_Load(object sender, EventArgs e)
        {

        }
    }
}

效果：

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PostSubmitter~在WEB应用程序以外的其他程序里提交Web请求的类

2011-12-28T02:22:00Z

如果在WindowService等其他非Web应用里提交一个httpRequest,用这个类比较方便：

PostSubmitter post=new PostSubmitter();

post.Url="http://seeker.dice.com/jobsearch/servlet/JobSearch";
post.PostItems.Add("op","100");
post.PostItems.Add("rel_code","1102");
post.PostItems.Add("FREE_TEXT","c# jobs");
post.PostItems.Add("SEARCH","");
post.Type=PostSubmitter.PostTypeEnum.Post;
string result=post.Post();

源码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Web;
using System.Net;
using System.Collections.Specialized;

namespace YourNameSpace
{

    /// <summary>
    /// Submits post data to a url.
    /// </summary>
    public class PostSubmitter
    {
        /// <summary>
        /// determines what type of post to perform.
        /// </summary>
        public enum PostTypeEnum
        {
            /// <summary>
            /// Does a get against the source.
            /// </summary>
            Get,
            /// <summary>
            /// Does a post against the source.
            /// </summary>
            Post
        }

        private string m_url = string.Empty;
        private NameValueCollection m_values = new NameValueCollection();
        private PostTypeEnum m_type = PostTypeEnum.Get;
        /// <summary>
        /// Default constructor.
        /// </summary>
        public PostSubmitter()
        {
        }

        /// <summary>
        /// Constructor that accepts a url as a parameter
        /// </summary>
        /// <param name="url">The url where the post will be submitted to.</param>
        public PostSubmitter(string url)
            : this()
        {
            m_url = url;
        }

        /// <summary>
        /// Constructor allowing the setting of the url and items to post.
        /// </summary>
        /// <param name="url">the url for the post.</param>
        /// <param name="values">The values for the post.</param>
        public PostSubmitter(string url, NameValueCollection values)
            : this(url)
        {
            m_values = values;
        }

        /// <summary>
        /// Gets or sets the url to submit the post to.
        /// </summary>
        public string Url
        {
            get
            {
                return m_url;
            }
            set
            {
                m_url = value;
            }
        }
        /// <summary>
        /// Gets or sets the name value collection of items to post.
        /// </summary>
        public NameValueCollection PostItems
        {
            get
            {
                return m_values;
            }
            set
            {
                m_values = value;
            }
        }
        /// <summary>
        /// Gets or sets the type of action to perform against the url.
        /// </summary>
        public PostTypeEnum Type
        {
            get
            {
                return m_type;
            }
            set
            {
                m_type = value;
            }
        }
        /// <summary>
        /// Posts the supplied data to specified url.
        /// </summary>
        /// <returns>a string containing the result of the post.</returns>
        public string Post()
        {
            StringBuilder parameters = new StringBuilder();
            for (int i = 0; i < m_values.Count; i++)
            {
                EncodeAndAddItem(ref parameters, m_values.GetKey(i), m_values[i]);
            }
            string result = PostData(m_url, parameters.ToString());
            return result;
        }
        /// <summary>
        /// Posts the supplied data to specified url.
        /// </summary>
        /// <param name="url">The url to post to.</param>
        /// <returns>a string containing the result of the post.</returns>
        public string Post(string url)
        {
            m_url = url;
            return this.Post();
        }
        /// <summary>
        /// Posts the supplied data to specified url.
        /// </summary>
        /// <param name="url">The url to post to.</param>
        /// <param name="values">The values to post.</param>
        /// <returns>a string containing the result of the post.</returns>
        public string Post(string url, NameValueCollection values)
        {
            m_values = values;
            return this.Post(url);
        }
        /// <summary>
        /// Posts data to a specified url. Note that this assumes that you have already url encoded the post data.
        /// </summary>
        /// <param name="postData">The data to post.</param>
        /// <param name="url">the url to post to.</param>
        /// <returns>Returns the result of the post.</returns>
        private string PostData(string url, string postData)
        {
            HttpWebRequest request = null;
            if (m_type == PostTypeEnum.Post)
            {
                Uri uri = new Uri(url);
                request = (HttpWebRequest)WebRequest.Create(uri);
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = postData.Length;
                using (Stream writeStream = request.GetRequestStream())
                {
                    UTF8Encoding encoding = new UTF8Encoding();
                    byte[] bytes = encoding.GetBytes(postData);
                    writeStream.Write(bytes, 0, bytes.Length);
                }
            }
            else
            {
                Uri uri = new Uri(url + "?" + postData);
                request = (HttpWebRequest)WebRequest.Create(uri);
                request.Method = "GET";
            }
            string result = string.Empty;
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                using (Stream responseStream = response.GetResponseStream())
                {
                    using (StreamReader readStream = new StreamReader(responseStream, Encoding.UTF8))
                    {
                        result = readStream.ReadToEnd();
                    }
                }
            }
            return result;
        }
        /// <summary>
        /// Encodes an item and ads it to the string.
        /// </summary>
        /// <param name="baseRequest">The previously encoded data.</param>
        /// <param name="dataItem">The data to encode.</param>
        /// <returns>A string containing the old data and the previously encoded data.</returns>
        private void EncodeAndAddItem(ref StringBuilder baseRequest, string key, string dataItem)
        {
            if (baseRequest == null)
            {
                baseRequest = new StringBuilder();
            }
            if (baseRequest.Length != 0)
            {
                baseRequest.Append("&");
            }
            baseRequest.Append(key);
            baseRequest.Append("=");
            baseRequest.Append(System.Web.HttpUtility.UrlEncode(dataItem));
        }
    }

}

如果出现 The type or namespace name 'HttpUtility' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)这个错误，请添加System.Web引用到Reference. 这时你可能会发现找不到这个引用，右键点击项目，选择Properties, 如果 Target Framework是 ".Net Framework 4 Client"，就改成 ".Net Framework 4". But beware this will close, reopen and rebuild your project (also if you have a web service references these will need to be refreshed)。

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Asp.Net部署问题

2011-04-27T06:52:00Z

1.提示打不开或者找不到default.aspx文件.

可能是因为扩展服务没有打开。

解决：输入inetmgr，打开IIS Manager，然后到Web Service Extensions，设置ASP.NET v2.0.50727为Allow。

如果没有发现这一项，就点击右侧窗口任务下的“添加一个新的Web服务扩展”，在弹出的窗口中，点击添加，然后找到x:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_isapi.dll（x为系统安装盘符，一盘为C），再点击确定按钮保存设置，最后再设置其状况为“允许”即可。

2. Web应用程序总是不停退出，查看W3WP进程内存使用直线上升，然后突然变到6M左右。系统日志显示EventType clr20r3, P1 w3wp.exe, P2 6.0.3790.3959, P3 45d6968e, P4 system, P5 2.0.0.0, P6 4ba85929, P7 5a2, P8 0, P9 system.typeinitialization, P10 NIL.

错误原因：未处理异常的默认策略在 .NET Framework 2.0 中已发生更改。（参见http://support.microsoft.com/kb/911816/zh-cn）

解决方法也参见上面的地址。

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MSDTC的折磨

2011-01-20T08:13:00Z

今天想办法研究让Oracle的DDL语句也能在MSDTC事务里一块执行。最后发现这是件不可能完成的任务。

因为Oracle的DDL语句是死活得自动提交的，无论你是否设置SET AUTOCOMMIT OFF。

Oracle在执行DDL语句前是会先执行一条Commit;语句的。然后再执行DDL语句。如果DDL语句成功就COMMIT;失败就回滚。

后来，有人说可以写个存储过程远程执行DDL语句，不明白为什么要用存储过程来执行DDL语句，但是结果也是失败：

错误信息：

ORA-02089: COMMIT is not allowed in a subordinate session
ORA-06512: at "SCOTT.OBXEXECUTEDDL", line 6
ORA-06512: at line 1

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常用缩写

2008-03-17T01:36:00Z

RTOS(Real-time Operating System)CV(Curriculum Vitae)简历EAI(Enterprise appplication integration)Jr.(Junior)Sr.(Senior)ITO(IT开发外包)BPO(商务流程外包)JD(Job discription)PM(Product Manager)TM(Team Manager)PL(Proje...

日本語文法勉強

2007-09-04T02:22:00Z

日本語国際センターHP　　http://www.jpf.go.jp/j/urawa/j_rsorcs/textbook/jrs_04_02_05.html

交叉查询

2007-06-06T07:06:00Z

（一）USE NorthwindselectOrderID,count(case when Quantity between 20 and 30 then ProductID end) as '20-30',count(case when Quantity between 30 and 40 then ProductID end) as '30-40',count(case when Quanti...

嵌套游标及动态SQL

2007-06-05T08:54:00Z

USE Northwinddeclare Order_cursor cursor forSELECT OrderID from Ordersopen Order_cursordeclare @OrderID as INTfetch next from Order_cursor into @OrderIDwhile(@@fetch_status =0)beginPRINT 'OrderID' + S...