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 Page.Response.Clear();
 bool success = ResponseFile(Page.Request, Page.Response, "Ä¿µÄÎļþÃû³Æ", @"Ô´Îļþ·¾¶", 1024000);
 if (!success)
     Response.Write("ÏÂÔØÎļþ³ö´í£¡");
Page.Response.End();
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public static bool ResponseFile(HttpRequest _Request,HttpResponse _Response,string _fileName,string _fullPath, long _speed)
    {
        try
        {
            FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
            BinaryReader br = new BinaryReader(myFile);
            try
            {
                _Response.AddHeader("Accept-Ranges", "bytes");
                _Response.Buffer = false;
                long fileLength = myFile.Length;
                long startBytes = 0;
     
                double pack = 10240; //10K bytes
                //int sleep 


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Asp.Net ¹¹¼Ü(HttpModule ½éÉÜ)

http://www.cnblogs.com/JimmyZhang/archive/2007/11/25/971878.html
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Http ÇëÇó´¦ÀíÁ÷³Ì ºÍ Http Handler ½éÉÜ ÕâÁ½ÆªÎÄÕÂÀÎÒÃÇÊ×ÏÈÁ˽âÁËHttpÇëÇóÔÚ·þÎñÆ÷¶ËµÄ´¦ÀíÁ÷³Ì£¬ËæºóÎÒÃÇÖªµÀHttpÇëÇó×îÖÕ»áÓÉʵÏÖÁËIHttpHandler½Ó¿ÚµÄÀà½øÐд¦Àí(Ó¦¸Ã¼ÇµÃPageÀàʵÏÖÁËIHttpHandler)¡£´Ó Http ÇëÇó´¦ÀíÁ÷³Ì Ò»ÎĵÄ×îºóµÄ ......

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if(!IsPostBack) {   //ÅжÏÊÇ·ñÊǵÚÒ»´Î¼ÓÔØ´°Ìå
}
if(Page.PreviousPage!=null){                           // ÅжÏÉÏÒ»Ò³ÃæµÄ°´Å¥ÊÇ· ......

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//default.aspx.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Runtime.InteropService ......
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