c#中关于二进制流的读取问题。

[Tulipfly]

在我的程序中，我想让用户在点击一个链接出现‘保存’的对话框，我使用了下面的方式，可是将http地址获得的流文件读取到byte中老是读不全，请问下是什么原因，或者有没有别的什么方法可以实现相同的效果，先谢谢了。。。。。

WebRequest wreq = WebRequest.Create("http://file.fetion.chinacache.net/www/home/v6/images/face/lianbu/lianbu.ffl");

using (HttpWebResponse wresp = (HttpWebResponse)wreq.GetResponse())
{
Response.Clear();
Response.ContentType = "application/octet-stream";//wresp.ContentType;
Response.AppendHeader("content-disposition", "attachment;filename=" + Server.UrlEncode("lianbu.ffl"));

var stream = wresp.GetResponseStream();

byte[] bb = new byte[wresp.ContentLength];
stream.Read(bb, 0, (int)wresp.ContentLength);
stream.Close();
stream.Dispose();
Response.BinaryWrite(bb);
Response.End();

}

[北京的雾霾天]

使用Response.WriteFile(fileName)不就挺好吗？

[liujiayu10]

Response.Clear();
Response.Buffer = true;
EnableViewState = false;
Response.ContentEncoding = System.Text.Encoding.Default;
Response.ContentType = "application/octet-stream";
Response.HeaderEncoding = System.Text.Encoding.GetEncoding("gbk"); //gbk支持gb2312和big5
Response.AppendHeader("Content-Disposition", "attachment;filename=" + oldname);
Response.WriteFile(path + filename);
Response.Flush();
Response.Close();
Response.End();

[Jinglecat]

你先确定是 WebRequest 获取的 wresp 不全，直接先输出到文件看看文件是否完整

还是输出 HttpResponse.BinaryWrite 丢失

[CutBug]

 using (HttpWebResponse wresp = (HttpWebResponse)wreq.GetResponse())
            {

                Stream stream = wresp.GetResponseStream();
                StreamReader sr = new StreamReader(stream);
                s = sr.ReadToEnd();
                sr.Close();
                stream.Close();
            }
            byte[] bSet = System.Text.Encoding.UTF8.GetBytes(s);

[liaoyunt07]

楼主发了两遍~~

[kingya2008]

楼上的，using了你还close，多余啊。