UDP通讯示例

private void send_Click(object sender, EventArgs e)
        {
            try
            {


                Encoding winLatinCodePage = Encoding.GetEncoding("GB2312");
                //Byte[] bytes = Encoding.Convert(Encoding.UTF8, winLatinCodePage, Encoding.UTF8.GetBytes(com_send.Text));

                //Printf("\r\n<-Tx:");
                string temp = "";

                temp = (com_send.Text).Replace(" ", "");

                Byte[] bytes = Encoding.Convert(Encoding.UTF8, winLatinCodePage, Encoding.UTF8.GetBytes(temp));

                if ((bytes.Length % 2) != 0)
                {
                    Printf("请输入偶数位16进制字符！");
                    Printf("\r\n");
                    return;
                }

                for (int i = 0; i < bytes.Length; i  )
                {
                    if (((bytes[i] >= 0x30) && (bytes[i] <= 0x39)) || ((bytes[i] >= 0x41) && (bytes[i] <= 0x46)) || ((bytes[i] >= 0x61) && (bytes[i] <= 0x66)))
                    {

                    }
                    else
                    {
                        Printf("请输入偶数位16进制字符！");
                        Printf("\r\n");
                        return;
                    }
                }
                //"123456AF" ===>0X12 0X34 0X56 0XAF
                byte[] res = MyConvert.StringToHex(bytes, bytes.Length);

                int crcVal = MyConvert.Crc16(res, res.Length);

                int hex_len = res.Length   2;

                byte[] hex = new byte[hex_len];

                res.CopyTo(hex, 0);

                hex[hex_len - 2] = (byte)(crcVal & 0xFF);
                hex[hex_len - 1] = (byte)(crcVal >> 8);

                Send(hex);
                Array.Clear(response, 0, response.Length);
                ReceiveLen = 0;
            }
            catch (Exception ex)
            {
                Printf("\r\n接收函数异常："   ex.Message.ToString());

            }
        }