Creating Master Page (Default Content) in ASP.NET: Part 2

Introduction

Here is Part 1

We do not have to associate a Content control with every ContentPlaceHolder control contained in a Master Page. We can provide default content in a ContentPlaceHolder control, and the default content will appear unless it is overridden in a particular content page. For example, the Master Page given below includes an additional column, which displays a banner advertisement. The banner advertisement is contained in a ContentPlaceHolder control named Add of.

<%@ Master Language="VB" CodeFile="MasterPage.master.vb" Inherits="MasterPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head id="Head1" runat="server">
<style type="text/css">
html
{
background-color:silver;
font:14px Arial,Sans-Serif;
}
.content
{
margin:auto;
width:700px;
background-color:white;
border:Solid 1px black;
}
.leftColumn
{
float:left;
padding:5px;
width:200px;
border-right:Solid 1px black;
height:700px;

}
.middleColumn
{
float:left;
padding:5px;
}
.rightColumn
{
float:right;
width:auto;
height:auto;
border-left:solid 1px black;
border-bottom:solid 1px black;
background-color:#eeeeee;
text-align:center;
}
.ad
{
margin-top:20px;
}
.clear
{
clear:both;
}
</style>
<title>Default Content in Master Page</title>
</head>
<body>
<form id="form1" runat="server">
<div class="content">
<div class="leftColumn">
<asp:contentplaceholder
id="ContentPlaceHolder1"
runat="server"/>
</div>
<div class="middleColumn">
<asp:ContentPlaceholder
id="ContentPlaceHolder2"
runat="server" />
</div>
<div class="rightColumn">
<asp:ContentPlaceHolder
id="Add_of"
Runat="server">
<asp:Image
id="imgAd"
ImageUrl="~/adds/CSSiteLogo.gif"
CssClass="ad"
AlternateText="Add of C# CORNER"
Runat="server" />
</asp:ContentPlaceHolder>
</div>
<br class="clear" />
</div>
</form>
</body>
</html>

The content page picture given below uses the Master Page. It does not include a Content control that corresponds to the Add_of control in the Master Page. When we open the page in a browser, the default banner advertisement is displayed. Remember that since we have used CSS, the advertisement will automatically be placed according to the amount of text.

<%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false"CodeFile="Default.aspx.vb" Inherits="_Default" %>
<asp:Content
ID="LeftOne"
ContentPlaceHolderID="ContentPlaceHolder1"
Runat="Server">
<b>TITLE</b>
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
</asp:Content>
<asp:Content
ID="RightOne"
ContentPlaceHolderID="ContentPlaceHolder2"
Runat="Server">
<b>TITLE</b>
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
<br />This is my data area.
</asp:Content>

MasterPage-in-vb.net.gif

Note: Continued in the Next Part.

HAVE A GREAT CODING!