How to change password in MVC application

In this article I am going to explain how to change password in MVC application.

Description:

I want to add change password functionality for logged in users. To change password users have to enter current password, after that new password and confirm the new password.

Implementations:

Please check the previous post Create login form and maintain authenticated user’s detail in MVC application.

Model

public partial class Login

{

public int Id { get; set; }

[Required(ErrorMessage = "Please enter username")]

[DisplayFormat(ConvertEmptyStringToNull = true)]

[Display(Name = "Username")]

public string Username { get; set; }

[Required(ErrorMessage = "Please enter password")]

[DataType(DataType.Password)]

public string Password { get; set; }

[Display(Name = "Confirm password")]

[Required(ErrorMessage = "Please enter confirm password")]

[DataType(DataType.Password)]

public string Confirmpwd { get; set; }

public Nullable<bool> Is_Deleted { get; set; }

}

Controller:

Complete code of controller:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using MvcApplication2017.Models;

using System.Security.Cryptography;

using System.Configuration;

using System.Net.Mail;

using System.Net;

using System.IO;

using System.Web.Security;

using System.Drawing;

using System.Data;

namespace mvcapplication2017.Controllers

{

public class LoginController : Controller

{

// GET: /Login/

DemoEntities db = new DemoEntities();

public ActionResult Index()

{

return View();

}

[HttpPost]

public ActionResult Index(Login objlogin)

{

if (ModelState.IsValidField("Username") && ModelState.IsValidField("Password"))

{

var login = db.Logins.Where(u => u.Is_Deleted == false && u.Username.Equals(objlogin.Username) && u.Password.Equals(objlogin.Password)).FirstOrDefault();

if (login != null)

{

TempData["user"] = login.Username;

TempData["id"] = login.Id;

TempData.Keep("id");TempData.Keep("user");

return RedirectToAction("dashboard");

}

else

{

TempData["msg"] = "<script>alert('Username and Password does not match');</script>";

}

return View(objlogin);

}

public ActionResult dashboard()

{

if (TempData["user"]==null)

{

return RedirectToAction("index");

}

else { }

return View();

}

[HttpPost]

public ActionResult dashboard(string Password, string newPassword, string Confirmpwd)

{

string user = TempData["user"].ToString();

int id =int.Parse(TempData["id"].ToString());

var login = db.Logins.Where(u => u.Is_Deleted == false && u.Username.Equals(user) && u.Id.Equals(id)).FirstOrDefault();

if (login.Password == Password)

{

if (Confirmpwd == newPassword)

{

db.Entry(login).State = EntityState.Modified;

db.SaveChanges();

TempData["msg"] = "<script>alert('Password has been changed successfully !!!');</script>";

}

else

{

TempData["msg"] = "<script>alert('New password match !!! Please check');</script>";

}

else

{

TempData["msg"] = "<script>alert('Old password not match !!! Please check entered old password');</script>";

}

return View();

}

public ActionResult Createuser()

{

return View();

}

public ActionResult About()

{

return View();

}

public ActionResult LogOut()

{

TempData.Remove("user");

return RedirectToAction("index","login");

}

Add view

Add view for dashboard action. On this view user can see his information (name) and add form to change password.

Complete source of dashboard view:

ViewBag.Title = "dashboard";

TempData.Keep("user");

TempData.Keep("id");

}

@if (@TempData["user"] != null)

{

<span>Welcome : </span> @TempData["user"] <span> | </span> @Html.ActionLink("Log Out", "Logout", "login")

}

else

{

@Html.ActionLink("Register", "Register", "User")

@Html.ActionLink("Log In", "Login", "User")

}

</div>

<h3>Welcome to aspmantra</h3>

@using (Html.BeginForm())

{

@Html.AntiForgeryToken()

<legend>Change Password</legend>

<table>

<tr>

<td>@Html.Label("Old Password", new { @for = "Password" }) : </td>

<td>@Html.Password("Password")</td>

</tr>

<tr>

<td>@Html.Label("New Password", new { @for = "newPassword" }) :</td>

<td>@Html.Password("newPassword")</td>

</tr>

<tr>

<td>@Html.Label("Confirm Password", new { @for = "Confirmpwd" }) : </td>

<td>@Html.Password("Confirmpwd")</td>

</tr>

<tr>

</tr>

</table>

</fieldset>

}

</div>@Html.Raw(TempData["msg"])

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