捣鼓了天了2 .net 2.0 的SerialPort 控件测试Modem AT 拨号指令,终于拨通了....

代码如下,一个窗口有来输入AT 指令，先要安置好Modem我用的是KN-JT560(金浪的外置猫）配置好驱动
另外来电显示要电信那边开通，Modem也分为支持来电显示与不支持来电显示２中．
开始输入ATDxxxxx (xxx为电话号码）怎么也不行，找了很多资料，KN-JT560的生产厂家电话也打过，要了分资料，发现上面写的拨好指令也是ATDxxxxx ,多要崩溃了．．．．
后来（恩恩）设置了下　serialPort　的DtrEnable 属性为true (这个表示DTR，此针脚由计算机控制，用以通知Modem可以进行传输．高位表示计算机已经准备就绪）就可以拨通了．．．！

  delegate void del_ShowMsg(string msg);
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            

            
        }

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            
            Invoke(new del_ShowMsg(ShowMsg), serialPort1.ReadLine());
        }
        private void ShowMsg(string msg)
        {
            textBox1.Text = msg + Environment.NewLine+ textBox1.Text ;
        }
        private void button1_Click(object sender, EventArgs e)
        {
            serialPort1.Close();
            label1.Text = serialPort1.IsOpen.ToString();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            serialPort1.NewLine =Environment.NewLine;
            serialPort1.Open();
            serialPort1.WriteLine(textBox2.Text.Trim());
            //serialPort1.WriteLine("at+vcid=1");
            label1.Text = serialPort1.IsOpen.ToString();
            button2.Enabled = false;
        }

        private void serialPort1_PinChanged(object sender, System.IO.Ports.SerialPinChangedEventArgs e)
        {
            //Invoke(new del_ShowMsg(ShowMsg), e.EventType.ToString());

        }

        private void serialPort1_ErrorReceived(object sender, System.IO.Ports.SerialErrorReceivedEventArgs e)
        {
            //Invoke(new del_ShowMsg(ShowMsg), e.ToString());
            
        }

        private void button3_Click(object sender, EventArgs e)
        {
            serialPort1.WriteLine(textBox2.Text.Trim());
        }
    }