Use ContentPlaceHolder’s default content instead of page’s content

asp.netcontentplaceholdermaster-pages

When a page that uses a master page doesn't have an asp:Content control for one of the master page's ContentPlaceHolders, the default content is shown instead. I want to use that default content on a page that does have an asp:Content control for that ContentPlaceHolder.

In the page that uses the master page I want to decide in code whether to use the default content or the page-specific content. How can I show the default content from the master page instead of the content from the asp:Content control for the ContentPlaceHolderID?

For instance, say I have a ContentPlaceHolder for a menu. The default content shows a basic menu. The page builds the menu from a query, but if there's no result for the query I want to show the default menu. By default though, the empty asp:Content control will be shown. How do I get the master page's default content instead?

Best Answer

One way to do it is to clear the controls collection of the placeholder contents in the Page_Load and add your updated menu.

protected void Page_Load(object sender, EventArgs e)
{
    if(needsBetterMenu)
    {
        ContentPlaceHolder holder = (ContentPlaceHolder)Master.FindControl("ContentPlaceHolder1");
        holder.Controls.Clear();
        holder.Controls.Add(betterMenu);
    }
}

Related Solutions

R – Filling in parent master page from child

You didn't define a "customeHead" in your child master page. If you want to expose the root master pages content area, you'll need to expose it in the child master page.

<%@ Master Language="C#" MasterPageFile="/templates/main.master" %>
<asp:contentplaceholder runat="server" id="customHead" />
<asp:content id="homeContent" contentPlaceHolderId="masterContent" Runat="server">
    <div id="info-container">
        <div id="info-content">
            <asp:contentplaceholder runat="server" id="infoContent"/>       
        </div>
    </div>
</asp:content>

R – Why can’t I override the default master page content in a SharePoint publishing page

There is nothing like SharePoint ContentPlaceHolders & non-SharePoint ContentPlaceHolders. When you add a Default content to the Master Page ContentPlaceholder and if you dont override it in the Content Page then it will be visible in all the Pages that use that Master Page. Only way to get rid of it is to Override those Content Place Holder with empty content in the Content Pages. As overriding contentPlaceHolder in all the Pages is not an good Aproach. What I recommend is not to place conent in the ContentPlaceHolder of the Master Page but instead , put the content in the Content Control page of the Pages, so that Content doesn't come in all page but only the page that needs it. Yes it not a good to put the exact same content in multiple page. but in your case that is only the Option. May be you try to wrap the content in to a User Control so that the code can be updated only one place

Best Answer

Related Solutions

R – Filling in parent master page from child

R – Why can’t I override the default master page content in a SharePoint publishing page

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