使用C#在FTP上获取文件大小

Question

我想在FTP上获取文件的大小.

        //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();

我尝试了以下但得到550错误.文件未找到/无法访问.但是,以下代码有效...

                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();

编辑:这对我不起作用的原因是我的FTP服务器不支持SIZE方法.

Answer 1

尝试reqSize.Method = WebRequestMethods.Ftp.GetFileSize; 代替GetDateTimestamp

这对我有用:

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();