FtpWebRequest返回错误550文件不可用 [英] FtpWebRequest returns error 550 File unavailable

问题描述

我创建了一个小的Windows窗体应用程序，将文件上传到我们客户的ftp站点之一.但是我遇到的问题是，当我在本地计算机上运行此应用程序时，它成功上传了文件.但是，如果我在服务器上运行该程序，则会收到此错误消息；

I have created a small windows forms application to upload the file to one of our client's ftp site. But the problem that I'm having is that when I run this application on my local machine it uploads the file successfully. But if I run this program on our server, I get this error message;

远程服务器返回错误:(550)文件不可用(例如，找不到文件，无法访问文件)，在此行'objFTPRequest.GetRequestStream();'.

remote server returned an error: (550) File unavailable (eg, file not found, can not access the file), on this line 'objFTPRequest.GetRequestStream();'.

有人知道为什么吗?我是否需要配置防火墙或其他内容?这是我的代码；

Does anybody know why? Do I need to configure the firewall or something? Here is my code;

FileInfo objFile = new FileInfo(filename);
FtpWebRequest objFTPRequest;

// Create FtpWebRequest object 
objFTPRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/outbox/" + objFile.Name));

// Set Credintials
objFTPRequest.Credentials = new NetworkCredential(ftpUserName, ftpPassword);

// By default KeepAlive is true, where the control connection is 
// not closed after a command is executed.
objFTPRequest.KeepAlive = false;

// Set the data transfer type.
objFTPRequest.UseBinary = true;

// Set content length
objFTPRequest.ContentLength = objFile.Length;

// Set request method
objFTPRequest.Method = WebRequestMethods.Ftp.UploadFile;

// Set buffer size
int intBufferLength = 16 * 1024;
byte[] objBuffer = new byte[intBufferLength];

// Opens a file to read
FileStream objFileStream = objFile.OpenRead();


// Get Stream of the file
Stream objStream = objFTPRequest.GetRequestStream();

int len = 0;

while ((len = objFileStream.Read(objBuffer, 0, intBufferLength)) != 0)
{
    // Write file Content 
    objStream.Write(objBuffer, 0, len);

}

            objStream.Close();
            objFileStream.Close();

推荐答案

此错误可能是由于多种原因引起的，例如服务器上不存在文件，文件的安全权限等.

This error can be caused because of several reasons like file is not present on server, security permissions on file etc. etc.

首先，您需要找出错误的确切原因. 这可以通过使用以下代码来实现-

First you need to find out the exact cause of error. This can be achieved by using following code-

try
{
        //Your code
}
catch(WebException e)
{
        String status = ((FtpWebResponse)e.Response).StatusDescription;
}

一旦找到确切的错误原因，就可以继续解决.

Once you get the exact cause of error, you can go forward to solve it.

这是您可以参考的一些链接

Here are some links you can refer

http://forums.asp.net/t/1777881.aspx/1

http://www.dreamincode.net/forums /topic/76361-file-upload-to-server/

http://forums.asp.net/t/1374306.aspx/1

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