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Learn How to Use Forms Authentication in Lightswitch With MVC: Part 2

Posted by RamaSagar Pulidindi Articles | LightSwitch 2012 January 07, 2014
This article provides a walkthrough of how to use forms authentication with Visual Studio LightSwitch.
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Introduction
 
This article provides a walkthrough of how to use forms authentication with Visual Studio LightSwitch. In my previous articles we saw how to get started by creating a LightSwitch application. You can get them from the following:

Before we proceed please check the articles above since this is a continuation of them.
 
Add the controller
 
Step 1: Add a class called AccountController to the Controllers folder and use the following implementation.

Controllers folder

using System;

using System.Web.Mvc;

using System.Web.Security;

using Microsoft.LightSwitch.Security.ServerGenerated.Implementation;

using LightSwitchApplication.Models;

 

namespace LightSwitchApplication.Controllers

{

    public class AccountController : Controller

    {

        // Register - Create a new user 

 

        public ActionResult Register()

        {

            return View(new Users());

        }

        [HttpPost]

        public ActionResult Register(FormCollection collection)

        {

            try

            {

                var UserName = collection["UserName"];

                var Password = collection["Password"];

                var Email = collection["Email"];

                if (UserName == "")

                {

                    throw new Exception("No UserName");

                }

                if (Password == "")

                {

                    throw new Exception("No Password");

                }

                // Keep our UserName as LowerCase 

                UserName = UserName.ToLower();

                // Create LightSwitch user 

                MembershipUser objMembershipUser = Membership.CreateUser(UserName, Password, Email);

                // Log User in 

                // Create a new instance of the LightSwitch Authentication Service 

                using (var authService = new AuthenticationService())

                {

                    var LoggedInUser = authService.Login(

                    UserName,

                    Password,

                    false,

                    null);

                    // Successful login?  If so, return the user 

                    if (LoggedInUser != null)

                    {

                        return Redirect("~/Home");

                    }

                    else

                    {

                        ModelState.AddModelError(string.Empty, "Login failed.");

                        return View();

                    }

                }

            }

            catch (Exception ex)

            {

                ModelState.AddModelError(

                string.Empty, "Error: " + ex);

                return View();

            }

        }

        // ChangePassword - Change the password of an existing user 

 

        [Authorize]

        public ActionResult ChangePassword()

        {

            return View(new ChangePassword());

        }

        [Authorize]

        [HttpPost]

        public ActionResult ChangePassword(FormCollection collection)

        {

            try

            {

                using (var authService = new AuthenticationService())

                {

                    //checks whether new passowrd and confirm passowrd matches 

 

                    if (collection["NewPassword"] != collection["ConfirmPassword"])

                    {

                        throw new Exception("New Password and Confirm Password must match");

                    }

                    if (!Membership.GetUser()

                    .ChangePassword(collection["OldPassword"], collection["NewPassword"]))

                    {

                        throw new Exception("Password change failed.");

                    }

                    return Redirect("~/Home");

                }

            }

            catch (Exception ex)

            {

                ModelState.AddModelError(string.Empty, "Error: " + ex);

                return View();

            }

        }

        // Login - Log a user in, return authentication cookie 

        public ActionResult Login()

        {

            return View(new Users());

        }

        [HttpPost]

        public ActionResult Login(FormCollection collection)

        {

            try

            {

                // Create a new instance of the LightSwitch Authentication Service 

                using (var authService = new AuthenticationService())

                {

                    // Log User in 

                    var user = authService.Login(

                    collection["UserName"].ToLower(),

                    collection["Password"],

                    Convert.ToBoolean(collection["Persistent"]),

                    null);

                    // Successful login?  If so, return the user 

                    if (user != null)

                    {

                        return Redirect("~/Home");

                    }

                    else

                    {

                        //Throws an error 

                        130.

                        ModelState.AddModelError(string.Empty,

                        "Login failed.  Check User Name and/or Password.");

                        return View();

                    }

                }

            }

            catch (Exception ex)

            {

                ModelState.AddModelError(string.Empty, "Error: " + ex.Message);

                return View();

            }

        }

        // LogOff - Clears the cookie, logging a user out of the system 

 

        public ActionResult LogOff()

        {

            // Create a new instance of the LightSwitch Authentication Service 

            using (var authService = new AuthenticationService())

            {

                var user = authService.Logout();

                return Redirect("~/Home");

            }

        }

    }

}

Step 2: Now Let's modify Index.cshtml with the following:

cshtml page

@{ Layout = null; } @using Microsoft.AspNet.Identity

 

<!DOCTYPE html>

<html>

<head>

    <meta name="HandheldFriendly" content="true" />

    <meta name="viewport" content="width=device-width, 

initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no" />

    <title>Log In</title>

</head>

<body>

    <div>

        @if (Request.IsAuthenticated) { using (Html.BeginForm("LogOut", "Account", FormMethod.Post,

        new { id = "logoutForm", @class = "navbar-right" })) { @Html.AntiForgeryToken()

        <p>

            Hello @User.Identity.GetUserName() | @Html.ActionLink("Change Password", "ChangePassword",

            "Account", routeValues: null, htmlAttributes: new { id = "changepassword" }) | <a

                href="javascript:document.getElementById('logoutForm').submit()">Log off</a>

        </p>

        <a href="HTMLClient">LightSwitch Application</a> } } else {

        <p>

            @Html.ActionLink("Register", "Register", "Account", routeValues: null, htmlAttributes:

            new { id = "registerLink" }) | @Html.ActionLink("Log in", "Login", "Account", routeValues:

            null, htmlAttributes: new { id = "loginLink" })

        </p>

        }

    </div>

</body>

</html>

Debug the application (press F5).
 
Summary
 
In this article we saw how to add a controller and do a login, registration and change a password.

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