Adding common functionality with user controls

Posted Date: 13 Mar 2004	Resource Type: Articles	Category: ASP.NET/Web Applications
Author: Siva	Member Level: Gold
Rating:	Points: 5

User controls allow you to build your own custom controls from any other control. You can apply this to every page in your application rapidly by packaging common functionality into a reusable package. A great example of this is a menu that will be rendered on a high percentage of your Web pages. By encapsulating this functionality into a user control, you can drag and drop the control onto a Web page and move on.
Because the user control contains all the presentation and code, maintenance is reduced -- when you update the user control, all your pages will be ready to go.
For instance, the following user control adjusts the hyperlink based on the value set on the control's SourceURL property. You could position this user control on every page to provide consistent navigation to resources such as help files:
<%@ Control Language="vb" AutoEventWireup="false"
Codebehind="UserControlDemo.ascx.vb"
Inherits="UserControlDemo.UserControlDemo"
%>
<LINK href="Styles.css" type="text/css" rel="stylesheet">
&tl;TABLE id="Table1" cellSpacing="0" cellPadding="0"
border="0">
<TR>
<TD align="right">
<IMG src="Images/HelpIcon.gif"></TD>
<TD>
<asp:HyperLink id="HelpHyperlink" runat="server">
User Control Demo
</asp:HyperLink>
</TD>
</TR>
</TABLE>

Siva

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