Part 3 - How to implement Basic CRUD Functionality with the Entity Framework and ASP.NET MVC4 application

Introduction

In this post, How to implement Basic CRUD Functionality with the Entity Framework and ASP.NET MVC application.

Part 3 : Perform delete functionality of CRUD Operation.

I have split the entire application split into following 3 parts for making things more simple and understandable especially for beginners.

Steps :

Step-1: Add an action into your controller for get view for Delete contact.

Here I have used "Delete" Action. Please write this following code

 
            [HttpGet]
            public ActionResult Delete(int id)
            {
                var c = GetContact(id);
                if (c == null)
                {
                    return HttpNotFound();
                }
                return View(c);
            }

Step-2: Add view for the Action & design.

Right Click on Action Method (here right click on the action) > Add View... > Enter View Name > Select View Engine (Razor) > Check "Create a strong-typed view" > Scaffold template (Delete) > Select your model class > Add.
[N:B:Please Rebuild solution before add view.]

 
            @model MVCCRUD.Contact
            @{
                ViewBag.Title = "Delete";
            }
 
            <h2>Delete</h2>
 
            <h3>Are you sure you want to delete this?</h3>
            <fieldset>
                <legend>Contact</legend>
 
                <div class="display-label">
                     @Html.DisplayNameFor(model => model.ContactPerson)
                </div>
                <div class="display-field">
                    @Html.DisplayFor(model => model.ContactPerson)
                </div>
 
                <div class="display-label">
                     @Html.DisplayNameFor(model => model.ContactNo)
                </div>
                <div class="display-field">
                    @Html.DisplayFor(model => model.ContactNo)
                </div>
 
                <div class="display-label">
                     @Html.DisplayNameFor(model => model.CountryID)
                </div>
                <div class="display-field">
                    @Html.DisplayFor(model => model.CountryName)
                </div>
 
                <div class="display-label">
                     @Html.DisplayNameFor(model => model.StateID)
                </div>
                <div class="display-field">
                    @Html.DisplayFor(model => model.StateName)
                </div>
            </fieldset>
            @using (Html.BeginForm()) {
                <p>
                    @Html.AntiForgeryToken()
                    <input type="submit" value="Delete" /> |
                    @Html.ActionLink("Back to List", "Index")
                </p>
            }

Step-3: Add an another action for POST method for Delete contact to the database.

Please write this following code

 
            [HttpPost]
            [ValidateAntiForgeryToken]
            [ActionName("Delete")]
            public ActionResult DeleteContact(int id)
            {
                using (MyDatabaseEntities dc = new MyDatabaseEntities())
                {
                    var v = dc.Contacts.Where(a => a.ContactID.Equals(id)).FirstOrDefault();
                    if (v != null)
                    {
                        dc.Contacts.Remove(v);
                        dc.SaveChanges();
                        return RedirectToAction("Index");
                    }
                    else
                    {
                        return HttpNotFound();
                    }
                }
            }