ASP.NET文件下载函数

在你的Page_Load中添加这样的代码:
Page.Response.Clear();
bool success = ResponseFile(Page.Request, Page.Response, "目的文件名称", @"源文件路径", 1024000);
if (!success)
      Response.Write("下载文件出错！");
Page.Response.End();
文件下载函数代码为:
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 = 200;   //每秒5次    即5*10K bytes每秒
                int sleep = (int)Math.Floor(1000 * pack / _speed) + 1;