C#实现FTP文件删除：简单示例与异常处理

#region 删除ftp指定文件的方法

        //调用方法
        DeleteFile(string.Format(@"ftp://10.198.31.1//opt/ftpuser/jyyr/image/"), "admin", "123456", "1.jpg");


        public string DeleteFile(string ftpPath, string userId, string pwd, string fileName)
        {
            string sRet = "删除成功！";
            FtpWebResponse Respose = null;
            FtpWebRequest reqFTP = null;
            Stream localfile = null;
            Stream stream = null;
            try
            {
                //根据uri创建FtpWebRequest对象    
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(string.Format(@"{0}{1}", ftpPath, fileName)));
                //提供账号密码的验证    
                reqFTP.Credentials = new NetworkCredential(userId, pwd);
                //默认为true是上传完后不会关闭FTP连接    
                reqFTP.KeepAlive = false;
                //执行删除操作  
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                Respose = (FtpWebResponse)reqFTP.GetResponse();
            }
            catch (Exception ex)
            {
                sRet = ex.Message;
            }
            finally