Get File Size On An FTP in C#

Question

I want to get the size of a file on an FTP.

        //Get File Size
        reqSize = (FtpWebRequest)FtpWebRequest.Create(new Uri(FtpPath + filePath));
        reqSize.Credentials = new NetworkCredential(Username, Password);
        reqSize.Method = WebRequestMethods.Ftp.GetFileSize;
        reqSize.UseBinary = true;
        FtpWebResponse respSize = (FtpWebResponse)reqSize.GetResponse();
        long size = respSize.ContentLength;
        respSize.Close();

I have tried the following but get a 550 error. File not found / no access. However, the following code works...

                reqTime = (FtpWebRequest)FtpWebRequest.Create(new Uri(FtpPath + filePath));
                reqTime.Credentials = new NetworkCredential(Username, Password);
                reqTime.Method = WebRequestMethods.Ftp.GetDateTimestamp;
                reqTime.UseBinary = true;
                FtpWebResponse respTime = (FtpWebResponse)reqTime.GetResponse();
                DateTime LastModified = respTime.LastModified;
                respTime.Close();

EDIT: The reason this isn't working for me is that my FTP Server does not support the SIZE method.

Answer 1

Try reqSize.Method = WebRequestMethods.Ftp.GetFileSize; instead of GetDateTimestamp

This worked for me:

FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://servername/filepath"));
request.Proxy = null;
request.Credentials = new NetworkCredential("user", "password");
request.Method = WebRequestMethods.Ftp.GetFileSize;

FtpWebResponse response = (FtpWebResponse)request.GetResponse();
long size = response.ContentLength;
response.Close();

Answer 2

I tried to get file size while downloading it. Both, given answers doesn't work for me, so I made this, using StatusDescription property of FtpWebResponse with DownloadFile method:

int openingBracket = response.StatusDescription.IndexOf("(");
int closingBracket = response.StatusDescription.IndexOf(")");                     
var temporarySubstring = response.StatusDescription.Substring(openingBracket+1, closingBracket - openingBracket);
var fileSize = temporarySubstring.Substring(0, temporarySubstring.IndexOf(" "));

I suppose there is better way to do this with RegEx.