The following code to check if a file exists on a server does not work
I found the following code to check if a file exists on a server, but is not working for me. It tells me that "test1.tx" does not exist even though the file exists and its size is 498 bytes. If I try with Ftp.ListDirectory it tells me that the file does not exist. If I try with Ftp.GetFileSize it does not provide any results and the debugger's immediate gives me the following message: A first chance exception of type 'System.Net.WebException' occurred in System.dll.
Using "request.UseBinary = true" does not make any difference.
I have posted this same question at this link: http://social.msdn.microsoft.com/Forums/en-US/ncl/thread/89e05cf3-189f-48b7-ba28-f93b1a9d44ae
Could someone help me how to fix it?
private void button1_Click(object sender, EventArgs e)
string ftpServerIP = txtIPaddress.Text.Trim();
string ftpUserID = txtUsername.Text.Trim();
string ftpPassword = txtPassword.Text.Trim();
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://" + ftpServerIP + "//tmp/test1.txt");
request.Method = WebRequestMethods.Ftp.ListDirectory;
//request.Method = WebRequestMethods.Ftp.GetFileSize;
request.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
//request.UseBinary = true;
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
catch (WebException ex)
if (ex.Response != null)
FtpWebResponse response = (FtpWebResponse)ex.Response;
if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable)
// Directory not found.
textBox1.AppendText("File does not exist");
Thanks very much, xplorer2k