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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();
ÎļþÏÂÔØº¯Êý´úÂëΪ:
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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