Chapter 8 pg 289 Clicking Button doesn't change banner

RobinP2K1 · March 3rd, 2013, 01:59 PM

Step 3 of page 289 states that the button click will change the banner from vertical to horizontal because the Page_Load handler will not be run so the property on the page will not be affected, which is set at horizontal. However, my banner remains vertical after clicking the button. It seems the Page_Load handler is being run when the button is clicked which I understand is supposed to be a PostBack (and not supposed to run Page_Load?)

AboutUs.aspx:

Code:

<%@ Page Title="About Us" Language="C#" MasterPageFile="~/MasterPages/Frontend.master" AutoEventWireup="true" CodeFile="AboutUs.aspx.cs" Inherits="About_AboutUs" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    <!-- Copyright (C) 2013 -->
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="cpMainContent" Runat="Server">
    Robin P
    Skills: <br />
    <asp:Button ID="Button1" runat="server" Text="Button" />
    <br />
    <Wrox:Banner ID="Banner2" runat="server" DisplayDirection="Horizontal" />
&nbsp;
</asp:Content>

Code Behind AboutUs.aspx.cs:

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class About_AboutUs : BasePage
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Banner2.DisplayDirection = Direction.Vertical;
    }
}

I am using MVS Express 2012 for Web if that makes a difference. Thanks!
Robin

Imar · March 4th, 2013, 08:57 AM

Hi there,

Looks like you missed step 1 where the code is wrapped in a !Page.IsPostBack statement.

Page_Load always fires, on the initial request as well as on a postback (for example, when a button is clicked). The check for Page.IsPostBack in Page_Load causes the direction only to be set on the initial load.

Hope this helps,

Imar

RobinP2K1 · March 4th, 2013, 09:56 PM

I appreciate your quick help.
Robin