Web User Control in asp.net

Web User Control in .net

• Whenever we want to consume a user control in single web application then we will go for "Web User Control". That means at a time web user control will provide services to single web application. Web User Control is a user defined control.
• To develop a web user control Microsoft will provide a predefined template is called web user control which we will add to the solution explorer.

How to add web user control to solution explorer

Step 1: Open solution explorer window

Step 2: Select application name

Step 3: Right click add new item it will open add new item window. Here we have to select predefined template called web user control. With this process a new web user control will added to the solution explorer window

Every web user control will be representing with mainly 2 files

a) .ascx file

b) .ascx.cs file

Implementation of web user control will be divided into following steps

Step 1: Adding web user control to the solution explorer window 

Step 2: Designing the web user control

Step 3: Defining the web user control business logic or functionality

Step 4: Registering web user control or adding web user controlto the concern web page.

.ascx File:

                 This file will support two modes

1. Design Mode:  In this mode it will display the designer window of the .aspx file. In this we can design the web user control according to the requirement.

2. Source Mode: In this mode it will display the source code of the web user control

Structure of .ascx code window:-

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="WebUserControlExample.WebUserControl1" %>

// Here it will display the source code of design

.ascx.cs File:

                   It is a c#.Net class file. Every web user control is a user defined class i.e.,webuser control1,webusercontrol2,....webusercontroln are user defined classes.

* For all these web user control classes Microsoft is providing a predefined class called user control as super class.

* user control is a predefined class which is part of System.Web.UI Base class library

Structure of .ascx.cs File:-

public partial class WebUserControl1 : System.Web.UI.UserControl

    {

        protected void Page_Load(object sender, EventArgs e)

        {

                // Here we will write the business logic or functionality of the webusercontrol

        }

    }  

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