C实现支持断点续传多线程下载客户端工具类精要.doc

C#实现支持断点续传多线程下载客户端工具类 C#实现支持断点续传多线程下载的 Http Web 客户端工具类 (C# DIY HttpWebClient)，感兴趣的朋友可以参考下本文，或许对你有所帮助 代码如下: /* .Net/C#: 实现支持断点续传多线程下载的 Http Web 客户端工具类 (C# DIY HttpWebClient) * Reflector 了一下 System.Net.WebClient ,改写或增加了若干: * DownLoad、Upload 相关方法! * DownLoad 相关改动较大! * 增加了 DataReceive、ExceptionOccurrs 事件! * 了解服务器端与客户端交互的 HTTP 协议参阅: * 使文件下载的自定义连接支持 FlashGet 的断点续传多线程链接下载! JSP/Servlet 实现! * /playyuer/archive/2004/08/02/58430.aspx * 使文件下载的自定义连接支持 FlashGet 的断点续传多线程链接下载! C#/ASP.Net 实现! * /playyuer/archive/2004/08/02/58281.aspx */ //2005-03-14 修订: /* .Net/C#: 实现支持断点续传多线程下载的工具类 * Reflector 了一下 System.Net.WebClient ,改写或增加了若干: * DownLoad、Upload 相关方法! * 增加了 DataReceive、ExceptionOccurrs　事件 */ namespace Microshaoft.Utils { using System; using System.IO; using System.Net; using System.Text; using System.Security; using System.Threading; using System.Collections.Specialized; /// summary /// 记录下载的字节位置 /// /summary public class DownLoadState { private string _FileName; private string _AttachmentName; private int _Position; private string _RequestURL; private string _ResponseURL; private int _Length; private byte[] _Data; public string FileName { get { return _FileName; } } public int Position { get { return _Position; } } public int Length { get { return _Length; } } public string AttachmentName { get { return _AttachmentName; } } public string RequestURL { get { return _RequestURL; } } public string ResponseURL { get { return _ResponseURL; } } public byte[] Data { get { return _Data; } } internal DownLoadState(string RequestURL, string ResponseURL, string FileName, string AttachmentName, int Position, int Length, byte[] Data) { this._FileName = FileName; this._RequestURL = RequestURL; this._ResponseURL = ResponseURL; this._AttachmentName = AttachmentName; this._Position = Position; this._Data = Data; this._Length = Length; } internal DownLoadState(string RequestURL, string ResponseURL, stri