C#实现的WINDOWS登录功能示例

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;    }  }}