我在codeproject中看到一段代码关于使用RAS拨VPN的,但需要先将VPN设置好,并保存密码才能拨号,有哪位大虾能帮我改改这段代码

Question

我在codeproject中看到一段代码关于使用RAS拨VPN的,但需要先将VPN设置好,并保存密码才能拨号,有哪位大虾能帮我改一下这段代码,能实现没有配置VPN的情况下也能拨号,或配置了VPN在没有保存密码的情况下,可以让用户输入密码!
代码如下:

Answer 1

using System;
using System.Runtime.InteropServices;
using System.Text;namespace Dailup.RAS
{
internal enum RasFieldSizeConstants
{
RAS_MaxDeviceType     =16,
RAS_MaxPhoneNumber    =128,
RAS_MaxIpAddress      =15,
RAS_MaxIpxAddress     =21,
#if WINVER4
RAS_MaxEntryName      =256,
RAS_MaxDeviceName     =128,
RAS_MaxCallbackNumber =RAS_MaxPhoneNumber,
#else
RAS_MaxEntryName      =20,
RAS_MaxDeviceName     =32,
RAS_MaxCallbackNumber =48,
#endif RAS_MaxAreaCode       =10,
RAS_MaxPadType        =32,
RAS_MaxX25Address     =200,
RAS_MaxFacilities     =200,
RAS_MaxUserData       =200,
RAS_MaxReplyMessage   =1024,
RAS_MaxDnsSuffix      =256,
UNLEN   =256,
PWLEN   =256,
DNLEN   =15
}
[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Auto)]
public struct GUID
{
public uint   Data1;
public ushort   Data2;
public ushort   Data3;
[MarshalAs(UnmanagedType.ByValArray,SizeConst=8)]
public byte[] Data4;
} [StructLayout(LayoutKind.Sequential,CharSet=CharSet.Auto)]
internal struct RASCONN 
{ 
public int     dwSize; 
public IntPtr  hrasconn; 
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=(int)RasFieldSizeConstants.RAS_MaxEntryName+1)]
public string    szEntryName; 
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=(int)RasFieldSizeConstants.RAS_MaxDeviceType+1)]
public string    szDeviceType; 
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=(int)RasFieldSizeConstants.RAS_MaxDeviceName+1)]
public string    szDeviceName; 
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=260)]//MAX_PAPTH=260
public string    szPhonebook;
public int   dwSubEntry;
public GUID   guidEntry;
#if (WINVER501)
 int     dwFlags;
 public LUID      luid;
#endif
}

[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Auto)]
internal struct LUID 
{
int LowPart;
int HighPart;
} [StructLayout(LayoutKind.Sequential,CharSet=CharSet.Auto)]
public struct RasEntryName 
{ 
public int dwSize; 
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=(int)RasFieldSizeConstants.RAS_MaxEntryName + 1)]
public string szEntryName; 
#if WINVER5
public int dwFlags;
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=260+1)]
public string szPhonebookPath;
#endif
} [StructLayout(LayoutKind.Sequential,CharSet=CharSet.Auto)]
public class RasStats 
{
public int dwSize=Marshal.SizeOf(typeof(RasStats));
public int dwBytesXmited;
public int dwBytesRcved;
public int dwFramesXmited;
public int dwFramesRcved;
public int dwCrcErr;
public int dwTimeoutErr;
public int dwAlignmentErr;
public int dwHardwareOverrunErr;
public int dwFramingErr;
public int dwBufferOverrunErr;
public int dwCompressionRatioIn;
public int dwCompressionRatioOut;
public int dwBps;
public int dwConnectDuration;
} 
public class RAS { [DllImport("Rasapi32.dll", EntryPoint="RasEnumConnectionsA",
 SetLastError=true)] internal static extern int RasEnumConnections
(
ref RASCONN lprasconn, // buffer to receive connections data
ref int lpcb, // size in bytes of buffer
ref int lpcConnections // number of connections written to buffer
);
[DllImport("rasapi32.dll",CharSet=CharSet.Auto)]
internal static extern uint RasGetConnectionStatistics(
IntPtr hRasConn,       // handle to the connection
[In,Out]RasStats lpStatistics  // buffer to receive statistics
);
[DllImport("rasapi32.dll",CharSet=CharSet.Auto)]
public extern static uint RasHangUp(
IntPtr hrasconn  // handle to the RAS connection to hang up
); [DllImport("rasapi32.dll",CharSet=CharSet.Auto)]
public extern static uint RasEnumEntries (
string reserved,              // reserved, must be NULL
string lpszPhonebook,         // pointer to full path and
//  file name of phone-book file
[In,Out]RasEntryName[] lprasentryname, // buffer to receive
//  phone-book entries
ref int lpcb,                  // size in bytes of buffer
out int lpcEntries             // number of entries written
//  to buffer
); [DllImport("wininet.dll",CharSet=CharSet.Auto)]
public extern static int InternetDial(
IntPtr hwnd,
[In]string lpszConnectoid, 
uint dwFlags,
ref int lpdwConnection,
uint dwReserved
); public RAS()
{ }        
} public class RASDisplay
{
private string m_duration;
private string m_ConnectionName;
private string[] m_ConnectionNames;
private double m_TX;
private double m_RX;
private bool m_connected;
private IntPtr m_ConnectedRasHandle;
public RASDisplay()
{
m_connected = true; RAS lpras = new RAS();
RASCONN lprasConn = new RASCONN(); lprasConn.dwSize = Marshal.SizeOf(typeof(RASCONN));
lprasConn.hrasconn = IntPtr.Zero;

int lpcb = 0;
int lpcConnections = 0;
int nRet = 0;
lpcb = Marshal.SizeOf(typeof(RASCONN));


nRet = RAS.RasEnumConnections(ref lprasConn, ref lpcb, ref
lpcConnections);


if(nRet != 0) {
m_connected = false;
return;

}

if(lpcConnections > 0)
{
//for (int i = 0; i < lpcConnections; i++) //{
RasStats stats = new RasStats();

m_ConnectedRasHandle = lprasConn.hrasconn;
RAS.RasGetConnectionStatistics(lprasConn.hrasconn, stats);


m_ConnectionName = lprasConn.szEntryName;

int Hours = 0;
int Minutes = 0;
int Seconds = 0; Hours = ((stats.dwConnectDuration /1000) /3600);
Minutes = ((stats.dwConnectDuration /1000) /60) - (Hours * 60);
Seconds = ((stats.dwConnectDuration /1000)) - (Minutes * 60) - (Hours * 3600);


m_duration = Hours  +  " hours "  + Minutes + " minutes " + Seconds + " secs";
m_TX = stats.dwBytesXmited;
m_RX = stats.dwBytesRcved;
//}
}
else
{
m_connected = false;
}


int lpNames = 1;
int entryNameSize = 0;
int lpSize = 0;
RasEntryName[] names = null; entryNameSize=Marshal.SizeOf(typeof(RasEntryName));
lpSize=lpNames*entryNameSize;

names=new RasEntryName[lpNames];
names[0].dwSize=entryNameSize; uint retval = RAS.RasEnumEntries(null,null,names,ref lpSize,out lpNames); //if we have more than one connection, we need to do it again
if(lpNames > 1)
{
names=new RasEntryName[lpNames];
for(int i=0;i<names.Length;i++)
{
names[i].dwSize=entryNameSize;
} retval = RAS.RasEnumEntries(null,null,names,ref lpSize,out lpNames); }
m_ConnectionNames = new string[names.Length];


if(lpNames>0)
{
for(int i=0;i<names.Length;i++)
{

m_ConnectionNames[i] = names[i].szEntryName;

}
}
} public string Duration
{
get
{
return m_connected ? m_duration : "";
}
}

public string[] Connections
{
get
{
return m_ConnectionNames;
}
}

public double BytesTransmitted
{
get
{
return m_connected ? m_TX : 0;
}
}
public double BytesReceived
{
get
{
return m_connected ? m_RX :  0;

}
}
public string ConnectionName
{
get
{
return m_connected ? m_ConnectionName : "";
}
}
public bool IsConnected
{
get
{
return m_connected;
}
} public int Connect(string Connection)
{
int temp = 0;
uint INTERNET_AUTO_DIAL_UNATTENDED = 2;
int retVal = RAS.InternetDial(IntPtr.Zero,Connection,INTERNET_AUTO_DIAL_UNATTENDED,ref temp,0);
return retVal;
}
public void Disconnect()
{
RAS.RasHangUp(m_ConnectedRasHandle);
}
}
}

Answer 2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;using Dailup.RAS;namespace DiualVpn
{
    public partial class frmMain : Form
    {
        private bool connected=false;
        public frmMain()
        {
            InitializeComponent();
        }        private void frmMain_Load(object sender, EventArgs e)
        {
            BindData();
            timer1.Start();
        }
        private void BindData()
        {
            try
            {
                RASDisplay display = new RASDisplay();
                connected = display.IsConnected;
                cbAllConnections.Visible = !connected;
                //lblName.Visible = connected;
                lblDuration.Visible = connected;
                lblRecieved.Visible = connected;
                lblTransmitted.Visible = connected;
                if (connected)
                {
                    //lblName.Text = display.ConnectionName;
                    lblDuration.Text =string.Format("Duration:{0}", display.Duration);
                    lblRecieved.Text = string.Format("Recieved:{0}", display.BytesReceived.ToString());
                    lblTransmitted.Text =string.Format("Sent:{0}", display.BytesTransmitted.ToString());
                }
                cbAllConnections.DataSource = display.Connections;
                // dgAllConnections.DataBind();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
        }        private void btnConnect_Click(object sender, EventArgs e)
        {
            RASDisplay rasDisplay = new RASDisplay();
            int ErrorVal = rasDisplay.Connect(cbAllConnections.Text);            if (ErrorVal != 0)
            {
                MessageBox.Show(ErrorVal.ToString(), "VPN", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else
            {
                BindData();
            }
        }        private void btnDisConnect_Click(object sender, EventArgs e)
        {
            RASDisplay rasDisplay = new RASDisplay();
            rasDisplay.Disconnect();
            BindData();
        }        private void timer1_Tick(object sender, EventArgs e)
        {
            if (connected)
            {
                BindData();
            }
        }    }
}

Answer 3

namespace DiualVpn
{
    partial class frmMain
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }        #region Windows Form Designer generated code        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.cbAllConnections = new System.Windows.Forms.ComboBox();
            this.btnConnect = new System.Windows.Forms.Button();
            this.btnDisConnect = new System.Windows.Forms.Button();
            this.lblDuration = new System.Windows.Forms.Label();
            this.lblRecieved = new System.Windows.Forms.Label();
            this.lblTransmitted = new System.Windows.Forms.Label();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            this.SuspendLayout();
            // 
            // cbAllConnections
            // 
            this.cbAllConnections.FormattingEnabled = true;
            this.cbAllConnections.Location = new System.Drawing.Point(22, 33);
            this.cbAllConnections.Name = "cbAllConnections";
            this.cbAllConnections.Size = new System.Drawing.Size(121, 21);
            this.cbAllConnections.TabIndex = 0;
            // 
            // btnConnect
            // 
            this.btnConnect.Location = new System.Drawing.Point(206, 32);
            this.btnConnect.Name = "btnConnect";
            this.btnConnect.Size = new System.Drawing.Size(75, 23);
            this.btnConnect.TabIndex = 1;
            this.btnConnect.Text = "Connect";
            this.btnConnect.UseVisualStyleBackColor = true;
            this.btnConnect.Click += new System.EventHandler(this.btnConnect_Click);
            // 
            // btnDisConnect
            // 
            this.btnDisConnect.Location = new System.Drawing.Point(206, 61);
            this.btnDisConnect.Name = "btnDisConnect";
            this.btnDisConnect.Size = new System.Drawing.Size(75, 23);
            this.btnDisConnect.TabIndex = 2;
            this.btnDisConnect.Text = "DisConnect";
            this.btnDisConnect.UseVisualStyleBackColor = true;
            this.btnDisConnect.Click += new System.EventHandler(this.btnDisConnect_Click);
            // 
            // lblDuration
            // 
            this.lblDuration.AutoSize = true;
            this.lblDuration.Location = new System.Drawing.Point(31, 35);
            this.lblDuration.Name = "lblDuration";
            this.lblDuration.Size = new System.Drawing.Size(35, 13);
            this.lblDuration.TabIndex = 4;
            this.lblDuration.Text = "label2";
            // 
            // lblRecieved
            // 
            this.lblRecieved.AutoSize = true;
            this.lblRecieved.Location = new System.Drawing.Point(32, 58);
            this.lblRecieved.Name = "lblRecieved";
            this.lblRecieved.Size = new System.Drawing.Size(35, 13);
            this.lblRecieved.TabIndex = 5;
            this.lblRecieved.Text = "label3";
            // 
            // lblTransmitted
            // 
            this.lblTransmitted.AutoSize = true;
            this.lblTransmitted.Location = new System.Drawing.Point(33, 82);
            this.lblTransmitted.Name = "lblTransmitted";
            this.lblTransmitted.Size = new System.Drawing.Size(35, 13);
            this.lblTransmitted.TabIndex = 6;
            this.lblTransmitted.Text = "label4";
            // 
            // timer1
            // 
            this.timer1.Interval = 1000;
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            // 
            // frmMain
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(326, 134);
            this.Controls.Add(this.lblTransmitted);
            this.Controls.Add(this.lblRecieved);
            this.Controls.Add(this.lblDuration);
            this.Controls.Add(this.btnDisConnect);
            this.Controls.Add(this.btnConnect);
            this.Controls.Add(this.cbAllConnections);
            this.Name = "frmMain";
            this.Text = "VPN";
            this.Load += new System.EventHandler(this.frmMain_Load);
            this.ResumeLayout(false);
            this.PerformLayout();        }        #endregion        private System.Windows.Forms.ComboBox cbAllConnections;
        private System.Windows.Forms.Button btnConnect;
        private System.Windows.Forms.Button btnDisConnect;
        private System.Windows.Forms.Label lblDuration;
        private System.Windows.Forms.Label lblRecieved;
        private System.Windows.Forms.Label lblTransmitted;
        private System.Windows.Forms.Timer timer1;
    }
}

Answer 4

source code 已放在
http://download.csdn.net/source/837048