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Beginner question: Changing contentplaceholder on button click

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Join Date: Jul 2008

Posts: 11

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RandV80

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Re: Beginner question: Changing contentplaceholder on button click

#11

Aug 25th, 2008

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Originally Posted by greeny_1984

what u want u want to change the content of the page page.aspx .whats the meaning of content(),can u post u r code here.

Ok, I was trying to do this without simply posting everything, but here it is. As I'm just starting out in web development (with a hobbyist mentality) I'm keeping everything very basic right now, just trying to lay down the framework to start.

My masterfile contains 3 main DIV sections, a header, the main content, and a footer. Things are being organized with a stylesheet which I don't think needs to be posted.

MasterPage.master

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 ASP.net Syntax (Toggle Plain Text) 
<%@ Master  Language="C#" 
            AutoEventWireup="true" 
            CodeFile="MasterPage.master.cs" 
            Inherits="MasterPage" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="MasterHead" runat="server">
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
</head>
 
<body>
    <form id="MasterPageForm" runat="server">
 
    <div id="master_header">
        <div id="master_headertop">
            <asp:Image runat="server" ID="HeaderImage" 
                ImageUrl="~/Images/logo.GIF" 
        </div>
        <div id="master_headerbottom">
            <asp:Button ID="btnHome" runat="server" Text="Home" Width="150" 
                onclick="btnHome_Click" ></asp:Button>
 
            <asp:Button ID="btnPage1" runat="server" Text="Page1" Width="150" 
		onclick="btnPage1_Click"></asp:Button>
 
            <asp:Button ID="btnPage2" runat="server" Text="Page2" Width="150" 
                onclick="btnPage2k"></asp:Button>
 
            <asp:Button ID="btnPage3" runat="server" Text="Page3" Width="150" 
                onclick="btnPage3"></asp:Button>
 
            <asp:Button ID="btnPage4" runat="server" Text="Page4" Width="150" 
                onclick="btnPage4"></asp:Button>
 
            <asp:Button ID="btnPage5" runat="server" Text="Page5" Width="150" 
                onclick="btnPage5"></asp:Button>        
        </div>
    </div>
 
    <div id="master_content" runat="server">
        <div id="master_contentplaceholder">
            <asp:ContentPlaceHolder id="mainContent" runat="server">
		<H1>HOME</H1>
            </asp:ContentPlaceHolder>
        </div>
    </div>
    <div id="master_footer">
	/*...Footer stuff*/
    </div>    
    </form>
</body>
</html>
<%@ Master  Language="C#" 
            AutoEventWireup="true" 
            CodeFile="MasterPage.master.cs" 
            Inherits="MasterPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="MasterHead" runat="server">
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
</head>

<body>
    <form id="MasterPageForm" runat="server">
    
    <div id="master_header">
        <div id="master_headertop">
            <asp:Image runat="server" ID="HeaderImage" 
                ImageUrl="~/Images/logo.GIF" 
        </div>
        <div id="master_headerbottom">
            <asp:Button ID="btnHome" runat="server" Text="Home" Width="150" 
                onclick="btnHome_Click" ></asp:Button>

            <asp:Button ID="btnPage1" runat="server" Text="Page1" Width="150" 
		onclick="btnPage1_Click"></asp:Button>

            <asp:Button ID="btnPage2" runat="server" Text="Page2" Width="150" 
                onclick="btnPage2k"></asp:Button>

            <asp:Button ID="btnPage3" runat="server" Text="Page3" Width="150" 
                onclick="btnPage3"></asp:Button>

            <asp:Button ID="btnPage4" runat="server" Text="Page4" Width="150" 
                onclick="btnPage4"></asp:Button>

            <asp:Button ID="btnPage5" runat="server" Text="Page5" Width="150" 
                onclick="btnPage5"></asp:Button>        
        </div>
    </div>

    <div id="master_content" runat="server">
        <div id="master_contentplaceholder">
            <asp:ContentPlaceHolder id="mainContent" runat="server">
		<H1>HOME</H1>
            </asp:ContentPlaceHolder>
        </div>
    </div>
    <div id="master_footer">
	/*...Footer stuff*/
    </div>    
    </form>
</body>
</html>

Here's the current C# code for the master page, where I'm trying to implement the button functionality. The button_click function is the default setup by Visual Studios.

MasterPage.Master.CS

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public partial class MasterPage : System.Web.UI.MasterPage
{
 
 
    protected void Page_Load(object sender, EventArgs e)
    {
    }
 
    protected void btnHome_Click(object sender, EventArgs e)
    {        
    }
 
    protected void btnPage1_Click(object sender, EventArgs e)
    {
	//Isn't working
        Content con = new Content();
 
	con = (Content)Master.FindControl("~/Page1.aspx").FindControl("content1");
	masterplaceholder.ID = con.ContentPlaceHolderID;
    }
 
    protected void btnPage2_Click(object sender, EventArgs e)
    {
    }
 
    protected void btnPage3_Click(object sender, EventArgs e)
    {        
    }
 
    protected void btnPage4_Click(object sender, EventArgs e)
    {
    }
 
    protected void btnPage5_Click(object sender, EventArgs e)
    {
    }
 
}
public partial class MasterPage : System.Web.UI.MasterPage
{


    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void btnHome_Click(object sender, EventArgs e)
    {        
    }

    protected void btnPage1_Click(object sender, EventArgs e)
    {
	//Isn't working
        Content con = new Content();
 
	con = (Content)Master.FindControl("~/Page1.aspx").FindControl("content1");
	masterplaceholder.ID = con.ContentPlaceHolderID;
    }

    protected void btnPage2_Click(object sender, EventArgs e)
    {
    }

    protected void btnPage3_Click(object sender, EventArgs e)
    {        
    }

    protected void btnPage4_Click(object sender, EventArgs e)
    {
    }

    protected void btnPage5_Click(object sender, EventArgs e)
    {
    }

}

And here's the corresponding .aspx files. I only need to show one, as there's nothing in them at the moment except some text to display which page is loading. The .aspx files are named "Page1.aspx" to "Page5.aspx", and the content ID "content1" to "content5".

page1-5.aspx

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 ASP.Net Syntax (Toggle Plain Text) 
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" 
    AutoEventWireup="true" CodeFile="Page1.aspx.cs" Inherits="Page1" %>
 
<asp:Content ID="content1" ContentPlaceHolderID="mainContent" runat="server">
    <h1>PAGE 1</h1>
</asp:Content>
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" 
    AutoEventWireup="true" CodeFile="Page1.aspx.cs" Inherits="Page1" %>

<asp:Content ID="content1" ContentPlaceHolderID="mainContent" runat="server">
    <h1>PAGE 1</h1>
</asp:Content>

So what I want to do is fairly simple. I want the content of Page#.aspx loaded into the MainContent placeholder section of the Master Page when one of the buttons in the Master Header is clicked.

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Join Date: Apr 2007

Posts: 370

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greeny_1984 greeny_1984 is offline

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Re: Beginner question: Changing contentplaceholder on button click

#12

Aug 27th, 2008

is the master file different for all the pages or is the same as have given in u r question

If u r query is achieved,mark the thread as solved

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Join Date: Jul 2008

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RandV80

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Re: Beginner question: Changing contentplaceholder on button click

#13

Aug 28th, 2008

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Originally Posted by greeny_1984

is the master file different for all the pages or is the same as have given in u r question

It's the same, I only have one master file right now. One master file to many pages, I thought that's how it worked?

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Re: Beginner question: Changing contentplaceholder on button click

#14

Aug 28th, 2008

What you are doing should be referenced by each page. When you click a button in your header, which is located on your master page, you want the main content to change? This is done by just going to the next page, that references the master. This is still a server call, so it's exactly as going to the next page.

So, with your master page created, now create your content pages that just reference the contentplaceholder from the master, which is the control asp:Content.

It is it's own separate page, so you just go from page to page, where your master will stay the same. You do this by setting your master in the head line of the document. It will do the rest itself.

However, with your header as a contentplaceholder, if you have buttons in them, you will have to either copy the code to each page you use with that header, or just make the header part of the master page.

Does this make sense?

The master page will be standard among all pages that reference it, or among all pages if hard-coded into the web.config file.

Then each page that has the content just references the master page and only place the content in the appropriate content holders. Any code not within those holders will throw an error.

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Join Date: Apr 2007

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greeny_1984 greeny_1984 is offline

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Re: Beginner question: Changing contentplaceholder on button click

#15

Aug 29th, 2008

hi,
there is no need to load pages in contentplaceholder of master file,u cant debug master page.if u want to achieve the functioanlity ,u can create a usercontrol containing
the linkbuttons u have used in the master page.
just create a placeholder in the master page and load the user control in to it.

and debug page1.aspx.
u can achieve the functionality u want

If u r query is achieved,mark the thread as solved

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