Domain logon validation. NET Edition

Using system;using system.data;using system.configuration;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;    necessary reference using System.Security.Principal; Necessary references//<summary>///userloginfordomain Summary description///</summary>public class Userloginfordomain{public    Userloginfordomain () {////todo: Add constructor logic here//} public const int logon32_logon_interactive = 2;    public const int logon32_provider_default = 0;    WindowsImpersonationContext impersonationcontext;                                      [DllImport ("advapi32.dll", CharSet = CharSet.Auto)] public static extern int LogonUser (String lpszUserName,                                      String lpszdomain, String Lpszpassword,                                      int dwLogonType, int dwlogonprovider, Ref IntPtr phtoken); [DllImport ("advapi32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto, SetLastError = true)] public extern s                                      tatic int DuplicateToken (IntPtr htoken, int impersonationlevel,    Ref INTPTR hNewToken); /**///<summary>///Enter user name, password, login domain to determine success///</summary>//<example>//if (Impersonat Evaliduser (UserName, Domain, Password)) {}//</example>//<param name= "UserName" > account name, e.g. string Userna me = usernametextbox.text;</param>//<param name= "domain" > domain to log in, such as: string domain = DOMAINTEXTBOX.TEXT;&L t;/param>//<param name= "password" > account password, e.g. string password = passwordtextbox.text;</param>//< Returns> returns true successfully, otherwise false</returns> public bool impersonateValidUser (string userName, string domain, string        Password) {WindowsIdentity tempwindowsidentity; INTPTR token = IntPtr.zero;        IntPtr tokenduplicate = IntPtr.Zero;        if (LogonUser (userName, domain, password, logon32_logon_interactive, Logon32_provider_default, ref token)! = 0) {if (DuplicateToken (token, 2, ref tokenduplicate)! = 0) {tempwindowsidentity =                New WindowsIdentity (tokenduplicate);                impersonationcontext = Tempwindowsidentity.impersonate ();                if (impersonationcontext! = null) return true;            else return false;        } else return false;    } else return false;    } public void Undoimpersonation () {Impersonationcontext.undo (); }}

　　

   protected void okButton_Click (object sender, EventArgs e)    {        string UserName = Usernametextbox.text;        string Domain = Domaintextbox.text;        string Password = Passwordtextbox.text;        Userloginfordomain checkuserlogin = new Userloginfordomain ();        if (Checkuserlogin.impersonatevaliduser (UserName, Domain, Password))            Response.Write (Usernametextbox.text + "is OK ");        else            Response.Write (Usernametextbox.text + "is Error");    }

　　

  <div>        Account: <asp:textbox id= "Usernametextbox" runat= "server" ></asp:textbox><br/>        Password: <asp:textbox id= "Passwordtextbox" runat= "server" ></asp:textbox><br/>        domain name: <asp:textbox Id= "Domaintextbox" runat= "server" ></asp:textbox><br/>        <asp:button id= "OKButton" runat= " Server "onclick=" okButton_Click "text=" button "/></div>

　　

Domain logon validation. NET Edition