Windows登录功能使用C#实现的示例

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Runtime.InteropServices;
using System.Security.Principal;
namespace yutest
{
  public partial class _Default : System.Web.UI.Page
  {
    [DllImport("advapi32.dll", CharSet = CharSet.Auto)]
    public static extern bool LogonUser(string lpszUsername,string lpszDomain,string lpszPassword,int dwLogonType,int dwLogonProvider,out int phToken);
    protected void Page_Load(object sender, EventArgs e)
    {
      string aaa = System.Threading.Thread.CurrentPrincipal.Identity.Name;
      //string bbb = System.Threading.Thread.CurrentPrincipal.Identity.n;
      //System.Environment.UserDomainName
      //System.Environment.UserName
    }
    protected void Button1_Click(object sender, System.EventArgs e)
    {
      //验证用户的输入是否为空
      if (tDomain.Text.Trim().Length > 0 && tUserName.Text.Trim().Length > 0&& tPassword.Text.Trim().Length > 0)
      {  //调用函数Login(string UserName, string Password, string Domain)
        //实现Windows登录
        if (Login(tUserName.Text.Trim(), tPassword.Text.Trim(),tDomain.Text.Trim()) == true)
        {  //显示登录成功信息
          LoginMsg.Text = "登录成功！！！";
          LoginMsg.Visible = true;
          return;
        }
        else
        {  //显示登录失败信息
          LoginMsg.Text = "登录失败，请重新输入用户名称、密码及其系统域名！！！";
          LoginMsg.Visible = true;
        }
      }
    }
    private bool Login(string UserName, string Password, string Domain)
    {    //获取用户名称和系统域名
      string text1 = Domain.Trim();
      string text2 = UserName.Trim();
      text2 = text2.Replace("/", @"");   //处理符号“/”
      int num1 = text2.IndexOf('\');    //获取符号“”的索引
      if (num1 != -1)
      {  //格式化用户名称和系统域名
        text1 = text2.Substring(0, num1);
        text2 = text2.Substring(num1 + 1);
      }
      else
      {  //格式化用户名称和系统域名
        num1 = text2.IndexOf('@');
        if (num1 != -1)
        {
          text1 = text2.Substring(num1 + 1);
          text2 = text2.Substring(0, num1);
        }
      }
      //调用函数AuthenticateUser()实现用户Windows登录
      return AuthenticateUser(text2, Password.Trim(), text1);
    }
    private bool AuthenticateUser(string UserName, string Password,string Domain)
    {       //设置用户登录成功的标志
      bool flag1 = false;
      try
      {
        int num1; IntPtr ptr1;
        //调用Windows登录的API
        if (!LogonUser(UserName, Domain, Password, 2, 0, out num1))
        {  //返回登录结果
          return flag1;
        }
        //调用.NET中的Windows登录
        ptr1 = new IntPtr(num1);
        WindowsIdentity identity1 = new WindowsIdentity(ptr1);
        WindowsPrincipal principal1 = new WindowsPrincipal(identity1);
        HttpContext.Current.User = principal1;
        //设置系统Cookie和重定向页面
        FormsAuthentication.SetAuthCookie(principal1.Identity.Name, false);
        FormsAuthentication.RedirectFromLoginPage(UserName, false);
        flag1 = true;
      }
      catch (Exception) { }
      return flag1;
    }
  }
}