http下载，通过文件流写到客户端，取消后再点击不再有反映？？？--真的不想把这个问题留到明年！！！

[xinxincao]

为了下面这个问题，我已经开了3个贴，：（

private void Button1_Click(object sender, System.EventArgs e)
{
Stream iStream = null;
string FilePath="f:/clips/Test/Test2.dll";
iStream = new FileStream(FilePath,FileMode.Open,FileAccess.Read,FileShare.Read);
Response.Clear();
Response.ContentType = "application/ms-download";
string FileName="下载速度测试";
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(FileName,System.Text.Encoding.UTF8));
Response.AddHeader("Content-Length", iStream.Length.ToString());
Response.Flush();
int len=1;
while(len>0)
{
byte[] buffer=new Byte[65532];
len = iStream.Read(buffer,0,65532);
Response.OutputStream.Write(buffer,0,len);
Response.Flush();
}
}

我运行上面那段代码，只有在打了SP1的IE6上运行正常，其他版本的IE，都会出现下面的情况：
在选择文件路径的保存对话框中点取消，或在下载中途点取消后，再去点下载按钮，网页就死在那里。

请问问什么会出现这种情况，怎么解决？

buffer设成多大比较合适，用户反映下载速度太慢（是用来下载电影这样的大文件的），buffer是不是在服务器端开设的，如果设的太大，是不是用户稍稍一多，服务器就撑不住了？

如果我要客户端有300kb/s的下载速度，在服务器端的buffer应该开多大？

[牛牛Alex]

支持你，我也想知道

[xinxincao]

自己up

[huangwangman]

Dim fInfo As System.IO.FileInfo = New FileInfo(file)
Dim fname As String = fInfo.Name
Response.Buffer = True
Response.Clear()
Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(fname)))
Response.AddHeader("Content-Length", fInfo.Length.ToString())
Response.ContentType = "application/octet-stream"
Dim MyFileStream As FileStream = New FileStream(file, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read)
Dim FileSize As Long = MyFileStream.Length
Dim Buffer(CInt(FileSize)) As Byte
MyFileStream.Read(Buffer, 0, Int32.Parse(FileSize))
MyFileStream.Close()
Response.BinaryWrite(Buffer)

[gOODiDEA]

参考：

System.IO.FileStream fs = System.IO.File.OpenRead( _FilePath );
byte[] FileData = new byte[ fs.Length ];
fs.Read( FileData, 0, ( int ) fs.Length );
Response.Clear();
Response.AddHeader( "Content-Type", "application/zip" );
string FileName = System.Web.HttpUtility.UrlEncode( System.Text.Encoding.UTF8.GetBytes( _FileName ) );
Response.AddHeader("Content-Disposition", "inline;filename="+ System.Convert.ToChar(34) + FileName + System.Convert.ToChar(34) );
Response.AddHeader("Content-Length", fs.Length.ToString() );
Response.BinaryWrite( FileData );
fs.Close();
System.IO.File.Delete( _FilePath );

[xinxincao]

to gOODiDEA(无语)
我运行下面这段代码，解决了之前的问题，但是现在我下载完一个文件后，再去下载会打出一屏的乱码，怎么解决？
string FilePath="f:/clips/DRMTest/dldtest.wmv";
System.IO.FileStream fs = System.IO.File.OpenRead(FilePath);
byte[] FileData = new byte[ fs.Length ];
fs.Read( FileData, 0, ( int ) fs.Length );
Response.Clear();
Response.AddHeader( "Content-Type", "application/ms-download" );
string FileName = "下载速度测试";
Response.AddHeader("Content-Disposition", "inline;filename=" + HttpUtility.UrlEncode(FileName,System.Text.Encoding.UTF8));
Response.AddHeader("Content-Length", fs.Length.ToString() );
Response.BinaryWrite( FileData );
fs.Close();

[gOODiDEA]

Try

fs.Close();
－－》Response.End();

[xinxincao]

可以了，谢谢，接分