Creating a User Control in Web API

Mudita Rathore
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Introduction

This article explains how to create a User Control in the Web API. We add a "MVC4 View User Control (ASPX)" in which we create a link that calls the action method from the "Controller".

Procedure for creating the User Control in the Web API.

Step 1

Create an API application as in the following:

Start Visual Studio 2012.
From the start window Select "Installed" -> "Visual C#" -> "Web".
Select "ASP.NET MVC4 Web Application" and click the "OK" button.

From the "MVC4 Project" window select "Web API".

Click the "Ok" button.

Step 2

Now we add a User Control named "UserControlAPI.ascx".

In the "Solution Explorer".
Right-click on the "Shared folder", select "Add" -> "New Item".
Select "Installed" -> "Visual C#" -> "Web".
Select "MVC4 View User Control (ASPX)".

Click the "Ok" button. It will be shown in the Shared folder.

Add the following lines of code:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>

<%: Html.ActionLink("ClickMe","Display") %>

In this code "ClickMe" is a link and "Display" is an action method. When we click on the link "ClickMe", it calls the action method "Display" from the controller.

Step 3

Now in the "HomeController" we create an action method "Display". This file exists in the:

In the "Solution Explorer".
Spread the "Controller" folder.
Select the "HomeController".

Add the following code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace UserControlAPI.Controllers

{

public class HomeController : Controller

{

public ActionResult Index()

{

return View();

}

public string Display()

{

return "<h3>This is the example of the User Control:</h3>";

}

Step 4

Now add a "View Page" "Index.aspx" in the "Home" folder.

In the "Solution Explorer".
Right-click on the "Home" folder then select "Add" -> "New Item".
Select "Installed" -> "Visual C#" -> "Web".
Now select "MVC4 View Page (ASPX)".

Click the "Ok" button.

Add the following code:

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %>

<!DOCTYPE html>

<html>

<title>Index</title>

</head>

<body>

<div>

</div>

</body>

</html>

In the following code we use the "Html.RenderPartial" in which the "RenderPartial" method renders the "UserControl" (the .ascx file) using the "Html" helper, here the user control file is "UserControlAPI.ascx".

Step 5

Execute the application by pressing "F5". The output will be displayed like this: