C # Universal Login Module Sharing _c# Tutorial

For example: A website has the user system, the merchant system, the website Backstage 3 system
Can be divided into 3 usertype, user, shop, system
Web site background generally have roles, such as Admin,employee
Then the role of the site has user,shop,admin,employee, but admin and employee in a client can not log on at the same time, so they are the same type of user (System)

How to use:

1, add a class LoginUser.cs code as follows:

Code:

namespace Mvccommonauth {#region function description//For example: A website has user system, merchant system, website backstage 3 Systems//Can be divided into 3 usertype, user, shop, System//website Taiwan generally has a role, such as Admin,employee//Then the role of the site has user,shop,admin,employee, but admin and employee in a client can not log in at the same time, so they are the same type of user (System) #
    Endregion public enum Usertype {User, shop, System} [Serializable] public class Loginuser {
    private static string Deskey = DateTime.Now.ToString ("1234MMdd");
    public int ID {get; set;}
    public string UserName {get; set;}
    public string Roles {get; set;}

    Public DateTime Expires {get; set;}

    Public readonly static string cookienameprefix = "Authcookie"; public void Login (string usertype, string domain = NULL, string path = null) {var keyname = Cookienameprefix +
      usertype;
      var json = Jsonconvert.serializeobject (this);

      var value = encryptstring (JSON, Deskey);
      HttpCookie cookie = new HttpCookie (keyname, value); Cookie.
      Expires = Expires; if (!string. IsNullOrwhitespace (domain)) {cookie.
      domain = domain; } if (path!= null) {cookie.
      Path = path;
      } Httpcontext.current.items[keyname] = this;
    HTTPCONTEXT.CURRENT.RESPONSE.COOKIES.ADD (cookie); ///<summary>///reads user information from Cookies///</summary>///<param name= "CookieName" ></par am> private static Loginuser Builduser (string keyname) {var cookie = HttpContext.Current.Request.Cookies
      [KeyName]; if (cookie!= null &&!string. IsNullOrEmpty (cookies. Value) {try {var json = decryptstring (cookie).
          Value, Deskey);
          var loginuser = jsonconvert.deserializeobject<loginuser> (JSON); if (Loginuser!= null) {if (loginuser).
            Expires >= DateTime.Now) {return loginuser; The catch {//do Nothing}} return null;
      public static Loginuser GetUser (string usertype) {var keyname = cookienameprefix + usertype; if (!
        HttpContext.Current.Items.Contains (KeyName)) {var user = Builduser (keyname);
        Httpcontext.current.items[keyname] = user;
      return user;
      else {return httpcontext.current.items[keyname] as Loginuser;
      } public static int GetUserID (string usertype) {var user = GetUser (usertype);
      if (user!= null) return user.id;
    return 0;
    ///<summary>///Exit Cookie login///</summary> public static void Logout (string usertype)

      {var keyname = cookienameprefix + usertype; HttpCookie cookie = new HttpCookie (KeyName, String.
      Empty); Cookie.
      Expires = DateTime.Now.AddMonths (-1);
    HTTPCONTEXT.CURRENT.RESPONSE.COOKIES.ADD (cookie); #region string Encryption///<summary>///uses DES encryption algorithms to encrypt strings (decrypted)///</summary>///<param name= "plaintext" > Encrypted string </param>///<param "key" > key (only 8 words supported) Section key) </param>///<returns> encrypted string </returns> private static string encryptstring (String Plai ntext, string key) {//Access cryptographic service Provider (CSP) version of the Data Encryption Standard (DES) algorithm wrapper object DESCryptoServiceProvider DES = new Descryp
      Toserviceprovider (); Des.　Key = ASCIIEncoding.ASCII.GetBytes (key);　 Set the key and offset of the encrypted object DES.IV = ASCIIEncoding.ASCII.GetBytes (key); GetBytes method using Asciiencoding.ascii method byte[] Inputbytearray = Encoding.Default.GetBytes (plaintext);//Put String to byte Group MemoryStream ms = new MemoryStream ();//create its support store for memory stream///define streams that link data streams to cryptographic transformations CryptoStream cs = new CryptoStream (MS, Des.
      CreateEncryptor (), cryptostreammode.write); Cs.
      Write (Inputbytearray, 0, inputbytearray.length); Cs.
      FlushFinalBlock ();
      The above has been done to put the encrypted results into memory to StringBuilder ret = new StringBuilder (); foreach (ByteB in Ms. ToArray ()) {ret.
      AppendFormat ("{0:x2}", b); Ret.
      ToString (); return ret.
    ToString (); ///<summary>///use des decryption algorithm decryption text (can decrypt)///</summary>///<param name= "ciphertext" , decrypted string </param>///<param name= "key" > Key (only 8 byte key is supported, same as previous encryption key) </param>///<returns> 
        Returns the decrypted string </returns> private static string decryptstring (string ciphertext, string key) {try {

        DESCryptoServiceProvider des = new DESCryptoServiceProvider (); byte[] Inputbytearray = new Byte[ciphertext.
        LENGTH/2]; for (int x = 0; x < ciphertext. LENGTH/2; X + +) {int i = (Convert.ToInt32 (ciphertext).
          Substring (x * 2, 2), 16));
        INPUTBYTEARRAY[X] = (byte) i; } des.　Key = ASCIIEncoding.ASCII.GetBytes (key);
        Establishes the key and offset of the cryptographic object, which is important and cannot be modified DES.IV = ASCIIEncoding.ASCII.GetBytes (key); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream (MS, Des.

        CreateDecryptor (), cryptostreammode.write); Cs.

        Write (Inputbytearray, 0, inputbytearray.length); Cs.

        FlushFinalBlock ();

        To establish the Stringbuild object, Createdecrypt uses the stream object, the decrypted text must be converted into a Stream object StringBuilder ret = new StringBuilder (); Return System.Text.Encoding.Default.GetString (Ms.
      ToArray ());
      catch (Exception) {return "error";

 }} #endregion}}

2, login processing process, write cookies:

    [HttpPost]
    Public ActionResult Login (string username,string userpass)
    {
      if (username== "admin" && userpass== Admin ")
      {
        Loginuser loginuser = new Loginuser ();
        Loginuser.id = 1;
        Loginuser. UserName = UserName;
        Loginuser. Roles = "Administrator";
        Loginuser. Expires = DateTime.Now.AddHours (2);

        Loginuser. Login ("Administrator");

        return Content ("Login succeeded");
        Return redirecttoaction ("Index", "Home");
      }

      Return redirecttoaction ("Login");
    

3, to determine whether the user login:

Whether to log in
if (Loginuser.getuserid ("Administrator") > 0)
{

}
//user ID
int userid= Loginuser.getuserid ("Administrator")

//Get user name
string username= loginuser.getuser ("Administrator"). UserName

And share an example.

1.HTML section:

  <form id= "Form1" runat= "Server" >
  <script src= ". /script/jquery-v1.10.2.js "type=" Text/javascript "></script> <script src=" login.js "type=" text/
  JavaScript "></script>
  <div class=" "style=" height:160px ">
    <div>
      <label for=" UserName ">
        account:</label>
      <input type=" text "name=" UserName "/>
    </div>
    <div >
      <label for= "password" >
        password:</label> <input type= "password"
      name= "password"/>
    </div>
    <input type= "Submit" id= "Btnsumit" value= "Log In"/> <p class=
    "MSG" > </p>
  </div>
  </form>

2. Introduction of Login plugin: login.js

/*! * Plugin Name: Login plugin Package, use method: $ (' #form1 '). Login ({URL: "loginhandler.ashx",//the URL to process login authentication logic userName: $ ("Input[name= ' u
      Sername ']),//Username input box Password: $ ("input[name= ' password ')"),//Password input box msg: $ (". Msg"),//hint info 
Button: $ ("#btnSumit")//Submit Button}); */function ($) {$.fn.login = function (option) {var defaults = {url: '/account/login/', msg: $ (this ('. Msg '), UserName: $ (this). Find ("Input[name= ' UserName ')", Password: $ (this). Find ("input[name=" password
    '] ', Button: $ (this). Find ("#button")};
    var options = $.extend (defaults, option);
      var errmsg = {' Inputusername ': ' Please enter username ', ' inputpassword ': ' Please fill in login password ', ' passwordlength ': ' Password should be within 6-32 characters ', ' Noreg ': ' This account is not registered ', ' inviladusername ': ' account does not exist ', ' accountnotmatch ': ' Account password mismatch ', ' userlocked ': ' Account lockout,
    Temporarily unable to login ', ' serverdown ': ' Server busy, please try again later '}; Submit data function Submit () {var Usernameinput = $.trim (Options.userName.val ());
      var passwordinput = $.trim (Options.password.val ());
        if (Usernameinput = = "") {showmsg (' login name cannot be empty ');
        Options.userName.focus ();
      Return
        } if (Passwordinput = = "") {showmsg (' Password cannot be empty ');
        Options.password.focus ();
      Return $.ajax {type: POST, Url:options.url, data: "Username=" + Usernameinput + &passwor
          D= "+ Passwordinput, Success:function (msg) {var result = eval (" [+ msg +] ") [0];
          if (Result.status = = "OK") {//Login successfully processed SHOWMSG ("Login successful ...");
          else {showmsg (errmsg[result.status]);
    }
        }
      });
    ///Display error message function showmsg (msg) {options.msg.html (msg);
      }//Binding button Event Options.button.bind (' click ', function () {submit ();
    return false;
  });
};
 }) (JQuery);

3. Page Invoke plugin:

  <script type= "Text/javascript" >
    $ (' #form1 '). Login ({
      URL: "ajaxlogin.aspx",
      userName: $ ("input[ Name= ' UserName '] ",
      Password: $ (" input[name= ' password ') "),
      msg: $ (". Msg "),
      button: $ (" #btnSumit ")
    });
  </script>

4. Background processing logic (please adjust accordingly according to the actual demand)

Using System;
Using System.Web;
Using System.Web.UI; namespace Whir.SiteFactory.Website.Admin.Account {public partial class Ajaxlogin:page {protected void Page_loa
      D (object sender, EventArgs e) {String status = ProcessLogin ();
      Response.Clear ();
      Response.Write (status);
    Response.End (); private String ProcessLogin () {try {string userName = httpcontext.current.request.form[' Us
        Ername "];
        string password = httpcontext.current.request.form["password"]; if (string. IsNullOrEmpty (UserName)) {return "{status: ' Inputusername '}";//Please enter the username} if (string. IsNullOrEmpty (password)) {return "{status: ' Inputpassword '}";//Please fill in the login password} if (Password.l Ength < 6 | | Password. Length >} {return "{status: ' Passwordlength '}";//password should be in 6-32-bit characters}//var user = user
        Service.getuserbyname (UserName); if (user = null)
        {//return "{status: ' Inviladusername '}";//account does not exist//}//if (user. islocked)//{//return "{status: ' userlocked '}";//Account lockout, temporarily unable to login//}//if (user. Password.tolower ()!= Password. ToMd5 (). ToLower ())//{//Return "{accountnotmatch: ' OK '}";//Account password mismatch///Other action://write to Client Cookie/Login Log return "{status: ' OK '}";
Login succeeded} catch (Exception ex) {return "{status: ' Serverdown '}";/server busy, please try again later}}} }