C#入门小程序ZHP_06.doc

C#入门小程序集锦六（2则）这个集锦来源于我开始接触C#时所分析过的一些小程序和一些自己设计的小程序，我是从.NET Framework v2.0 SDK开始的，所以一开始的程序各个.NET版本都能够运行。提醒：一是编程环境往往具有向下兼容性，所以前面程序中的某些注释说明在.NET2.0中是正确的，而在v4.0等版本却是错误的，例如_03中“接口的属性或索引器如下：必须带有至少一个访问器”在.NET4.0中就可以不带访问器；二是这个集锦的作用并不是帮助学习，而是为了总结和查询的，所以内容上并不存在连续性，程序时简时杂，注释也不是为了说明，而是为了提醒。综上所述，请各位按自己的需要查看集锦文档。异步操作：/应用知识:WebRequest、WebResponse、BeginGetResponse()和BeginRead()异步操作/个人理解：还是不太懂异步操作的有什么特别的意义。using System;using System.Net;using System.IO;using System.Text;using System.Threading;public class RequestState const int BUFFER_SIZE = 1024; public StringBuilder requestData; public byte bufferRead; public WebRequest request; public WebResponse response; public Stream responseStream; public RequestState() bufferRead = new byteBUFFER_SIZE; requestData = new StringBuilder(); request = null; responseStream = null; class WebRequest_BeginGetResponse public static ManualResetEvent allDone= new ManualResetEvent(false); const int BUFFER_SIZE = 1024; static void Main() try WebRequest myWebRequest= WebRequest.Create();/发布请求 /WebProxy proxy=new WebProxy(myproxy:80);/建立代理服务器的项目 myWebRequest.Credentials=new NetworkCredential(qingfenghen101,19900322241);/设置代理服务器的身份验证 /myWebRequest.Proxy=proxy;/设置请求的代理 RequestState myRequestState = new RequestState();/建立管理的项目 myRequestState.request = myWebRequest;/设置管理的接口：请求 IAsyncResult asyncResult=(IAsyncResult) myWebRequest.BeginGetResponse(new AsyncCallback(RespCallback),myRequestState);/发出异步请求 allDone.WaitOne();/阻止当前线程，直到当前的WaitHandle收到信号 myRequestState.response.Close(); Console.Read(); catch(WebException e) Console.WriteLine(WebException raised!); Console.WriteLine(n0,e.Message); Console.WriteLine(n0,e.Status); catch(Exception e) Console.WriteLine(Exception raised!); Console.WriteLine(Source : + e.Source); Console.WriteLine(Message : + e.Message); private static void RespCallback(IAsyncResult asynchronousResult) try RequestState myRequestState=(RequestState) asynchronousResult.AsyncState;/获取用户自定义对象所包含的异步信息 WebRequest myWebRequest1=myRequestState.request;/使用相应的WebRequest异步信息 myRequestState.response = myWebRequest1.EndGetResponse(asynchronousResult);/请求响应的WebResponse Stream responseStream = myRequestState.response.GetResponseStream(); myRequestState.responseStream=responseStream; IAsyncResult asynchronousResultRead = responseStream.BeginRead(myRequestState.bufferRead, 0, BUFFER_SIZE, new AsyncCallback(ReadCallBack), myRequestState);/开始异步读操作 catch(WebException e) Console.WriteLine(WebException raised!); Console.WriteLine(n0,e.Message); Console.WriteLine(n0,e.Status); catch(Exception e) Console.WriteLine(Exception raised!); Console.WriteLine(Source : + e.Source); Console.WriteLine(Message : + e.Message); private static void ReadCallBack(IAsyncResult asyncResult) try RequestState myRequestState = (RequestState)asyncResult.AsyncState; Stream responseStream = myRequestState.responseStream; int read = responseStream.EndRead( asyncResult );/等待异步读取结束，返回字节数 if (read 0) myRequestState.requestData.Append(Encoding.ASCII.GetString(myRequestState.bufferRead, 0, read);/将bufferRead中读取到的字节转化为string IAsyncResult asynchronousResult = responseStream.BeginRead( myRequestState.bufferRead, 0, BUFFER_SIZE, new AsyncCallback(ReadCallBack), myRequestState); else Console.WriteLine(nThe HTML page Contents are: ); if(myRequestState.requestData.Length1) string sringContent; sringContent = myRequestState.requestData.ToString(); Console.WriteLine(sringContent); string path = D:mytext.txt; using (StreamWriter sw = File.CreateText(path) sw.Write(sringContent); Console.WriteLine(nPress Enter key to continue.); responseStream.Close(); allDone.Set(); catch(WebException e) Console.WriteLine(WebException raised!); Console.WriteLine(n0,e.Message); Console.WriteLine(n0,e.Status); catch(Exception e) Console.WriteLine(Exception raised!); Console.WriteLine(Source : 0 , e.Source); Console.WriteLine(Message : 0 , e.Message); 控制Windows窗口：/ C# Document/本程序是将桌面打开的test-记事本文件的内容设置为name/知识要点：（C/C+）API的static方法的引用（本节引用的是Windows支持的API应用）/扩展：鼠标模拟using System;using System.Runtime.InteropServices;namespace ZHP.Testclass Testconst int WM_SETTEXT = 0x000C;DllImport(user32.dll)public static extern IntPtr FindWindow(string lpClassName,string lpWindowName);DllImport(user32.dll)public static extern IntPtr FindWindowEx(IntPtr parent,IntPtr child,string strClass,string strText);DllImport(user32.dll)public static extern int SendMessage(IntPtr hwnd,int Msg,IntPtr wParam,string lParam);static void Main(string args)IntPtr htext = FindWin