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   源码介绍

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using GSMMODEM;

namespace 测试
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        GSMModem gm = new GSMModem("COM3", 9600);

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                gm.SendMsg(textBox3.Text, textBox4.Text);
            }
            catch (Exception ex)
            {
                textBox4.Text = ex.Message;
                return;
            }
            textBox4.Text = "发送成功";
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            gm.Open();
            gm.SendAT("ATE0");

            gm.OnRecieved  = new GSMModem.OnRecievedHandler(gm_OnRecieved);
        }

        void gm_OnRecieved(object sender, EventArgs e)
        {
            string s1, s2, s3, s4;
            gm.ReadMsgByIndex(gm.NewMsgIndex, out s1, out s2, out s3, out s4);
            textBox1.Text = s1   s2   s3   s4;  //此处引发异常（此处不属于主进程）  须回调函数才能改变此属性
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string s1, s2, s3, s4;gm.ReadMsgByIndex(2,out s1,out s2,out s3,out s4);
            textBox1.Text = s1   s2   s3   s4;
            /*try
            {
                gm.DeleteMsgByIndex(1);
            }
            catch (Exception ex)
            {
                textBox1.Text = ex.Message;
                return;
            }
            textBox1.Text = "删除成功";*/
        }
    }
}