Question

C#中如何检测ftp是否存在

Answer 1

摘自：http://blog.csdn.net/hejialin666/article/details/3522815
C#对FTP的操作（上传，下载，重命名文件，删除文件，文件存在检查）
只摘录其中一个，未检查是否正确（我这边没有这个条件），仅供你参考：
/// <summary>
/// ftp文件存在检查
/// </summary>
/// <param name="ftpPath"></param>
/// <param name="ftpName"></param>
/// <returns></returns>
public bool fileCheckExist(string ftpPath, string ftpName)
{
bool success = false;
FtpWebRequest ftpWebRequest = null;
WebResponse webResponse = null;
StreamReader reader = null;

try
{
string url = ftpRootURL + ftpPath;

ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
ftpWebRequest.Credentials = new NetworkCredential(ftpUser, ftpPassword);
ftpWebRequest.Method = WebRequestMethods.Ftp.ListDirectory;
ftpWebRequest.KeepAlive = false;
webResponse = ftpWebRequest.GetResponse();
reader = new StreamReader(webResponse.GetResponseStream());
string line = reader.ReadLine();
while (line != null)
{
if (line == ftpName)
{
success = true;
break;
}
line = reader.ReadLine();
}
}
catch (Exception)
{
success = false;
}
finally
{
if (reader != null)
{
reader.Close();
}

if (webResponse != null)
{
webResponse.Close();
}
}
return success;
}
}

Answer 2

提问有异议，是判断是否启用了FTP 还是FTP内的文件是否存在。。。