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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.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO.Ports;

namespace SmsServer
{
    public partial class Form1 : Form
    {
        [DllImport("GSM.dll")]
        public static extern int LinkModem(int iPort);
        [DllImport("GSM.dll")]
        public static extern int CloseModem();
        [DllImport("GSM.dll")]
        public static extern int CheckModem();

        [DllImport("GSM.dll")]
        public static extern string GetService();
        [DllImport("GSM.dll")]
        public static extern int SendSMS(String smsCenter, String phone, String msg);

        [DllImport("GSM.dll")]
        public static extern int NewMessageToWhere(int iSaveType);

        [DllImport("GSM.dll")]
        public static extern string GetNewMessage();

        [DllImport("GSM.dll")]
        public static extern string GetMessage(int Index);

        [DllImport("GSM.dll")]
        public static extern int DeleteSMSByNo(int Index);
        [DllImport("GSM.dll")]
        public static extern int DeleteAllSMS();

        [DllImport("GSM.dll")]
        public static extern string myTest();
        public Form1()
        {
            InitializeComponent();
        }

        private void 连接设备ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.comboBox1.Text.Trim() != "")
            {
            if (LinkModem(int.Parse(comboBox1.Text.Trim().Substring(3,1))) > 0)
                MessageBox.Show("连接设备成功！");
            else
                MessageBox.Show("连接设备失败！");
            }
            else
                MessageBox.Show("请先选择串口号！");
        }

        private void toolStripMenuItem1_Click(object sender, EventArgs e)
        {
            panel2.Visible = true;
            panel2.Dock = DockStyle.Fill;
            foreach (string vPortName in SerialPort.GetPortNames())
            {
                this.comboBox1.Items.Add(vPortName);
            }

        }

        private void 发送短信ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string Service = GetService();
            MessageBox.Show(Service);
        }
    }
}