我有一个上传文件到FTP服务器的问题。我有几个按钮。每个按钮都会将不同的文件上传到ftp。第一次单击按钮时,文件成功上传,但第二次和以后尝试失败。它给了我“手术已经超时”。当我关闭网站并再次打开时,我只能再次上传一个文件。我确信我可以覆盖ftp上的文件。这里是代码:c#上传文件到FTP服务器
protected void btn_export_OnClick(object sender, EventArgs e)
{
Stream stream = new MemoryStream();
stream.Position = 0;
// fill the stream
bool res = this.UploadFile(stream, "test.csv", "dir");
stream.Close();
}
private bool UploadFile(Stream stream, string filename, string ftp_dir)
{
stream.Seek(0, SeekOrigin.Begin);
string uri = String.Format("ftp://{0}/{1}/{2}", "host", ftp_dir, filename);
try
{
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
reqFTP.Credentials = new NetworkCredential("user", "pass");
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
reqFTP.KeepAlive = false;
reqFTP.UseBinary = true;
reqFTP.UsePassive = true;
reqFTP.ContentLength = stream.Length;
reqFTP.EnableSsl = true; // it's FTPES type of ftp
int buffLen = 2048;
byte[] buff = new byte[buffLen];
int contentLen;
try
{
Stream ftpStream = reqFTP.GetRequestStream();
contentLen = stream.Read(buff, 0, buffLen);
while (contentLen != 0)
{
ftpStream.Write(buff, 0, contentLen);
contentLen = stream.Read(buff, 0, buffLen);
}
ftpStream.Flush();
ftpStream.Close();
}
catch (Exception exc)
{
this.lbl_error.Text = "Error:<br />" + exc.Message;
this.lbl_error.Visible = true;
return false;
}
}
catch (Exception exc)
{
this.lbl_error.Text = "Error:<br />" + exc.Message;
this.lbl_error.Visible = true;
return false;
}
return true;
}
有没有人有想法可能会导致这种奇怪的行为?我想我正在关闭所有的流。这可能与FTP服务器设置有关吗?管理员说,ftp握手从来没有发生过第二次。
etarvt,在哪一行发生超时,我猜“Stream ftpStream = reqFTP.GetRequestStream();” ?谢谢。 – 2011-01-16 06:09:15