how to check if file exist in a folder on ftp in c# - winforms

Question

i want to check if some files exists in a folder on ftp then do specific task
i have the following methos for files check
public static bool CheckFileExistOnFTP(string ServerUri, string FTPUserName, string FTPPassword)
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ServerUri);
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
request.Credentials = new NetworkCredential(FTPUserName, FTPPassword);
//request.Method = WebRequestMethods.Ftp.GetFileSize;
// request.Method = WebRequestMethods.Ftp.GetDateTimestamp;
try
{
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
return true;
}
catch (WebException ex)
{
FtpWebResponse response = (FtpWebResponse)ex.Response;
if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable)
{
return false;
}
}
return true;
}
and i call that method on formload
if (FTPUtility.CheckFileExistOnFTP("ftp://ip address/Requests/", "edexcrawler", "edexcrawler123"))
{
btnUploadRequest.Visible = true;
btnUploadRequest.BackColor = System.Drawing.Color.LightGreen;
btnUploadRequest.ForeColor = System.Drawing.Color.Blue;
}

Answer 1

Based on your other question to get a list of files from ftp, you can check if the file you want to check is in that list:
Var fileNameToCkeck = "myfile.txt";
var utility= new FtpUtility();
utility.UserName = "...";
utility.Password = "...";
utility.Path = "...";
If (utility.ListFiles().Contains(fileNameToCkeck))
{
//The file exists
}
Or if you want to know if that path has any file:
If (utility.ListFiles().Count() > 0)
{
//The folder contains files
}
And here is the code for FtpUtility
public class FtpUtility
{
public string UserName { get; set; }
public string Password { get; set; }
public string Path { get; set; }
public List<string> ListFiles()
{
var request = (FtpWebRequest)WebRequest.Create(Path);
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
request.Credentials = new NetworkCredential(UserName, Password);
List<string> files = new List<string>();
using (var response = (FtpWebResponse)request.GetResponse())
{
using (var responseStream = response.GetResponseStream())
{
var reader = new StreamReader(responseStream);
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
if (string.IsNullOrWhiteSpace(line) == false)
{
var fileName = line.Split(new[] { ' ', '\t' }).Last();
if (!fileName.StartsWith("."))
files.Add(fileName);
}
}
return files;
}
}
}
}