Question

当我编写一个工具来上传大文件（1-2GB）时，使用＆＃34; .Net FtpWebRequest＆＃34;。这是我的代码的一部分：

FtpWebRequest reqFtp = (FtpWebRequest)WebRequest.Create(fileUri);

reqFtp.Credentials = new NetworkCredential(_ftpUserName, _ftpPassWord);
reqFtp.KeepAlive = false;
reqFtp.Method = WebRequestMethods.Ftp.UploadFile;
reqFtp.UseBinary = true;
reqFtp.ContentLength = fileInf.Length;

const int buffLength = 2048;
byte[] buff = new byte[buffLength];
FileStream fs = fileInf.OpenRead();
Stream strm = reqFtp.GetRequestStream();
double totalLength = Convert.ToDouble((fs.Length + 0.0) / 1024 / 1024);
try
{
    int contentLen = fs.Read(buff, 0, buffLength);
    double uploadLength = (contentLen + 0.0) / 1024 / 1024;
    double percentage = 0.0;
    while (contentLen != 0 && !(panel.Stop))
    {
        percentage = uploadLength*100/totalLength;
        if (panel.ProgressBar.InvokeRequired)
        {
            UpdateProcessBarDelegate d = UpdateProgressBarValue;
            panel.ProgressBar.Invoke(d, panel.ProgressBar, (int)percentage);
        }
        else
        {
            panel.ProgressBar.Value = (int)percentage;
        }

        strm.Write(buff, 0, buffLength);
        contentLen = fs.Read(buff, 0, buffLength);
        uploadLength += (contentLen + 0.0) / 1024 / 1024;
    }
    strm.Close();
    fs.Close();
}

它适用于暂停和延续功能。但是当网络中断时，所有这些流都不会被写入ftp服务器。我认为只有在你调用＆＃34; strm.Close（）＆＃34;

时才写入ftp服务器

我怎么能意识到当网络中断时，这个文件流将在ftp服务器上写入？（当我上传每10MB数据时，我可以保存或关闭流）谢谢！

C＃FtpWebRequest UploadFile，网络中断时自动保存

0 个答案: