IP地址 与端口号的check 样例

           private IPAddress _ipAddr;

           private portParam;

           

           // ------

           // ------

 

           if (!IPAddress.TryParse(txtIP.Text, out _ipAddr))

            {

                MessageBox.Show("IP地址不合法!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);

                return false;

            }

 

            if (portParam != string.Empty)

            {

                if (!int.TryParse(portParam, out _port) || _port < 1023 || _port > 65535)//很是精炼的语句

                {

                    _port = 8888;

                    Console.WriteLine("端口号不合法,默认端口号被接受!");

                }

            }