Cannot delete a file on server using ftp from asp.net - asp.net

Question

I have created an asp.net application to maintain images for a shopping site, it includes 2 functions, one for uploading the image via ftp and the other for deleting the image using ftp.
I can upload files without an issue but when I try to delete a file I get the response "The remote server returned an error: (530) Not logged in."
I'm using the same ftpuri and credentials so I'm a little confused as to why it doesn't work.
Here's the code for the upload which works.
Upload Section :
Dim ftpRequest As FtpWebRequest = CType(WebRequest.Create(ftpuri), FtpWebRequest)
Try
ftpRequest.Method = WebRequestMethods.Ftp.UploadFile
ftpRequest.Credentials = New NetworkCredential(ftpusername, ftppassword)
Dim bytes() As Byte = System.IO.File.ReadAllBytes(filetoupload)
ftpRequest.ContentLength = bytes.Length
Using UploadStream As Stream = ftpRequest.GetRequestStream()
UploadStream.Write(bytes, 0, bytes.Length)
UploadStream.Close()
End Using
Catch ex As Exception
End Try
Here's the code for the delete that fails with the error The remote server returned an error: (530) Not logged in.
Delete Section:
Dim ftpRequest As FtpWebRequest = CType(WebRequest.Create(ftpUri), FtpWebRequest)
Try
ftpRequest.Credentials = New NetworkCredential(ftpusername, ftppassword)
ftpRequest.Method = WebRequestMethods.Ftp.DeleteFile
Dim responseFileDelete As FtpWebResponse = CType(ftpRequest.GetResponse(), FtpWebResponse)
Catch ex As Exception
End Try
In both cases the values in ftpuri, ftpusername and ftppassword are identical.
I can delete the file using ftp software with the same credentials.
Any help would be appreciated.
Ron

Answer 1

Try this way :
public bool DeleteFileFromFtpServer(Uri serverUri, string ftpUsername, string ftpPassword)
{
try
{
// The serverUri should look like this ftp:// scheme.
// It contains server name along with file name that will be deleted.
// eg: ftp://abc.com/test.txt.
if (serverUri.Scheme != Uri.UriSchemeFtp)
{
return false;
}
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
request.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
request.Method = WebRequestMethods.Ftp.DeleteFile;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
response.Close();
return true;
}
catch (Exception ex)
{
return false;
}
}
Calling:
obj.DeleteFileFromFtpServer(new Uri (toDelFilename), user,pass);