小编Lum*_*men的帖子

我有WPF应用程序,我写的是将文件发布到社交网络之一.上传本身工作得很好,但我想提供一些指示,说明我在上传方面有多远.

我尝试了很多方法来做到这一点:

1)HttpWebRequest.GetStream方法:

using (
 var FS = File.Open(
  localFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
    long len = FS.Length;
    HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);
    request.Method = "POST";
    request.ProtocolVersion = HttpVersion.Version11;
    request.ContentType = "multipart/form-data; boundary=--AaB03x";
    //predata and postdata is two byte[] arrays, that contains
    //strings for MIME file upload (defined above and is not important)
    request.ContentLength = predata.Length + FS.Length + postdata.Length;
    request.AllowWriteStreamBuffering = false;
    using (var reqStream = request.GetRequestStream())
    {
        reqStream.Write(predata, 0, predata.Length);
        int bytesRead = 0;
        int totalRead = 0; …