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8.5

FTP Upload Code fails but IE allows FTP Upload.  Does MS Proxy Server prevent code from working?

Asked by mfb in FTP Servers, C# Programming Language, Proxy/Firewall Anti-Virus

Tags: FTP, FtpWebRequest, the remote name could not be resolved

I have a C# application to upload a file which returns the message "the remote name could not be resolved: ftp.xxxxx.com".   This problem only exists with one of my customers and a few dozen others don't have the problem, the code works for them.  This one customer can access ftp.xxxxx.com using IE but not with my code and they are using MS Proxy Server.  Can MS Proxy server prevent this code from working but allows access using IE?  What do I have to do to get this code to work?
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string FTPAddress = "ftp://ftp.xxxxx.com";
string username = "valid username";
string password = "valid password";
 
//Create FTP request
FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri(FTPAddress + "/" + Path.GetFileName(filePath)));
request.Method = WebRequestMethods.Ftp.UploadFile;
request.Credentials = new NetworkCredential(username, password);
request.UsePassive = true;
request.UseBinary = true;
request.KeepAlive = false;
request.Proxy = null;
 
//Load the file
FileStream stream = File.OpenRead(filePath);
byte[] buffer = new byte[stream.Length];
stream.Read(buffer, 0, buffer.Length);
stream.Close();
 
//Upload file
Stream reqStream = request.GetRequestStream();
reqStream.Write(buffer, 0, buffer.Length);
reqStream.Close();
MessageBox.Show("Uploaded Successfully");
 
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[+][-]04/20/09 11:01 AM, ID: 24187026Accepted Solution

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About this solution

Zones: FTP Servers, C# Programming Language, Proxy/Firewall Anti-Virus
Tags: FTP, FtpWebRequest, the remote name could not be resolved
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Solution Provided By: GiftsonDJohn
Participating Experts: 2
Solution Grade: A
 
[+][-]04/20/09 11:15 AM, ID: 24187131Assisted Solution

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[+][-]04/20/09 11:25 AM, ID: 24187230Author Comment

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[+][-]04/20/09 12:22 PM, ID: 24187759Expert Comment

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[+][-]04/20/09 12:26 PM, ID: 24187807Author Comment

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