/// <summary>
/// 合成ftp远程全路径名
/// </summary>
/// <param name="filename">文件名，可带相对路径</param>
/// <returns></returns>
public string GetFtpPathfile(string filename)
{
string remotePathfile = @"ftp://" + Ip + Kits.GetDashPathname(RemoteDirectory, filename);
return(remotePathfile);
}