C# 调用Windows拨号程序

Question

请问如何调用windows的拨号程序拨号上网，空闲5分钟后自动断网
最好能有示例代码,谢谢!

Answer 1

using System;
using System.Collections.Generic;
using System.Text;namespace ConsoleApplication1
{
    public class Dialer
    {        [System.Runtime.InteropServices.DllImport("wininet.dll",
EntryPoint = "InternetGetConnectedState", ExactSpelling = true,
CharSet = System.Runtime.InteropServices.CharSet.Ansi,
SetLastError = true)]
        private static extern bool InternetGetConnectedState(ref Int32
lpdwFlags, Int32 dwReserved);        [System.Runtime.InteropServices.DllImport("Wininet.dll",
EntryPoint = "InternetDial", ExactSpelling = true,
CharSet = System.Runtime.InteropServices.CharSet.Ansi,
SetLastError = true)]
        private static extern Int32 InternetDial(IntPtr hwndParent, string
lpszConnectoid, Int32 dwFlags, ref Int32 lpdwConnection, Int32
dwReserved);        [System.Runtime.InteropServices.DllImport("Wininet.dll",
EntryPoint = "InternetHangUp", ExactSpelling = true,
CharSet = System.Runtime.InteropServices.CharSet.Ansi,
SetLastError = true)]
        private static extern Int32 InternetHangUp(Int32 lpdwConnection,
Int32 dwReserved);        private enum Flags : int
        {
            //Local system uses a LAN to connect to the Internet.
            INTERNET_CONNECTION_LAN = 0X2,
            //Local system uses a modem to connect to the Internet.
            INTERNET_CONNECTION_MODEM = 0X1,
            //Local system uses a proxy server to connect to the Internet.
            INTERNET_CONNECTION_PROXY = 0X4,
            //Type Visual Basic 6 code here...            //Local system has RAS installed.
            INTERNET_RAS_INSTALLED = 0X10
        }        //Declaration Used For InternetDialUp.
        private enum DialUpOptions : int
        {
            INTERNET_DIAL_UNATTENDED = 0X8000,
            INTERNET_DIAL_SHOW_OFFLINE = 0X4000,
            INTERNET_DIAL_FORCE_PROMPT = 0X2000
        }        private const int ERROR_SUCCESS = 0X0;
        private const int ERROR_INVALID_PARAMETER = 0X87;
        private Int32 mlConnection;        public string GetConnectionType()
        {
            Int32 lngFlags = 0;            if (InternetGetConnectedState(ref lngFlags, 0))
            {
                //connected.
                if ((lngFlags & (int)Flags.INTERNET_CONNECTION_LAN) != 0)
                {
                    //LAN connection.
                    return "LAN connection.";
                }
                else if ((lngFlags & (int)Flags.INTERNET_CONNECTION_MODEM) != 0)
                {
                    //Modem connection.
                    return "Modem connection.";
                }
                else if ((lngFlags & (int)Flags.INTERNET_CONNECTION_PROXY) != 0)
                {
                    //Proxy connection.
                    return "Proxy connection.";
                }
                return "Not connected.";
            }
            else
            {
                //not connected.
                return "Not connected.";
            }
        }
        public void Connect()
        {
            Int32 DResult = 0;            DResult = InternetDial(IntPtr.Zero, "My Connection",
Convert.ToInt32(DialUpOptions.INTERNET_DIAL_UNATTENDED), ref
mlConnection, 0);            if (DResult == ERROR_SUCCESS)
                Console.WriteLine("Dial Up Successful");
            else
                Console.WriteLine("UnSuccessFull Error Code");
        }
        public void Disconnect()
        {
            Int32 Result = 0;            if (!(mlConnection == 0))
            {
                Result = InternetHangUp(mlConnection, 0);
                if (Result == 0)
                    Console.WriteLine("Hang up successful");
                else
                    Console.WriteLine("Hang up NOT successful");
            }
            else
                Console.WriteLine("You must dial a connection first!");
        }
    }}

Answer 2

PS:你一定要有一个拨号的连接...
红色的就是你拨号连接的名字。
你可以修改一下。
加一个连接字符串进去
public void Connect(string connectionStr) 
        { 
            Int32 DResult = 0;             DResult = InternetDial(IntPtr.Zero, "My Connection", 
Convert.ToInt32(DialUpOptions.INTERNET_DIAL_UNATTENDED), ref 
mlConnection, 0);