In this article we will learn to create model, controller and finally we will add view to render the list of categories by using list template. First we will try to render the list of hard coded values then in next article we will use Empty Framework to save data into database and show data from database. But for now we need to focus how we can create model, controller and view. so add a new model in models folder with name "Category", right click on the Models folder and click Add => select Class and add following code in it
public class Category
{
[Key]
public int CategoryId { get; set; }
[Required]
[Display(Name ="Category Name")]
[StringLength(30, ErrorMessage="The {0} must be between {2} to {1} characters", MinimumLength = 5)]
public String CategoryName { get; set; }
}
Right click on Controllers folder and - Select Add - Select Controller... - Select MVC 5 Controller - Empty - Click Add - Give the name of the controller "CategoryController" - Click Add
It will add a blank controller to the project, latter we will use the wizard. here is the code
public class CategoryController : Controller
{
// GET: Category
public ActionResult Index()
{
return View();
}
}
Say we need to return the list of categories, for time being we will use hard coded values. So add some values to return
public ActionResult Index()
{
var categories = new List<Category>();
categories.Add(new Category { CategoryId = 1, CategoryName = "Laptop" });
categories.Add(new Category { CategoryId = 1, CategoryName = "Software" });
categories.Add(new Category { CategoryId = 1, CategoryName = "Accessories" });
return View(categories);
}
Here we added three categories, Laptop, Software and Accessories to the categories list and return this list as View parameter. Rebuild the application because we will use our Category model to render this view. Now add new view
First run the application and navigate to the URL http://localhost:30296/category or http://localhost:30296/category/index
When we access a controller by default it is looking for Index so no need to provide the page name. We can see the page like this:
It has added every thing we need, link for create new category, edit, update and delete. All these features will not work for now because we have not created any thing for it but we will do it soon.
Let's see what it is created for us
Now see the Index.cshtml file, here is the complete code
@model IEnumerable<Advance.Learning.WebApp.Models.Category>
@{
ViewBag.Title = "Categories";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Categories</h2>
<p>@Html.ActionLink("Create New", "Create")</p>
<table class="table">
<tr>
<th>
@Html.DisplayNameFor(model => model.CategoryName)
</th>
<th></th>
</tr>
@foreach (var item in Model) {
<tr>
<td>
@Html.DisplayFor(modelItem => item.CategoryName)
</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id=item.CategoryId }) |
@Html.ActionLink("Details", "Details", new { id=item.CategoryId }) |
@Html.ActionLink("Delete", "Delete", new { id=item.CategoryId })
</td>
</tr>
}
</table>
There very first line is the type this view expect to be return from the controller to render it which the IEnumerable of our created model Category. Rest are the normal HTML except the @foreach loop, we can call any server side code by using "@" sign. It is used to render the rows of the table.
I change the page title and heading from Index to Categories
@{
ViewBag.Title = "Categories";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Categories</h2>
So far so good, in our next article we will use Entity Framework Code First model to create our database and use our database to save records and complete all the link on the page like create, edit, detail and delete.
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Having 13+ years of experience in Microsoft Technologies (C#, ASP.Net, MVC and SQL Server). Worked with Metaoption LLC, for more than 9 years and still with the same company. Always ready to learn new technologies and tricks.
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