C# – Using nested Master Pages

asp.netcinheritancemaster-pagesnested

I'm very new to ASP.NET, help me please understand MasterPages conception more.

I have Site.master with common header data (css, meta, etc), center form (blank) and footer (copyright info, contact us link, etc).

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="Site.master.cs" Inherits="_SiteMaster" %>
<!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="tagHead" runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <link rel="stylesheet" href="styles.css" type="text/css" />
</head>
<body>
    <form id="frmMaster" runat="server">
    <div>
        <asp:ContentPlaceHolder ID="holderForm" runat="server"></asp:ContentPlaceHolder>
        <asp:ContentPlaceHolder ID="holderFooter" runat="server">Some footer here</asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

and I want to use second master page for a project into sub directory, which would contains SQL query on Page_Load for logging (it isn't necessary for whole site).

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="Project.master.cs" Inherits="_ProjectMaster" MasterPageFile="~/Site.master" %>
<asp:Content ContentPlaceHolderID="holderForm" runat="server">
    <asp:ContentPlaceHolder ID="holderForm" runat="server" EnableViewState="true"></asp:ContentPlaceHolder>
</asp:Content>
<asp:Content ContentPlaceHolderID="holderFooter" runat="server">
    <asp:ContentPlaceHolder ID="holderFooter" runat="server" EnableViewState="true"></asp:ContentPlaceHolder>
</asp:Content>

But I have a problem: footer isn't displayed.

Where is my mistake? Am I right to use second master page as super class for logging?

Project page looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" MasterPageFile="~/Project.master" %>
<asp:Content ContentPlaceHolderID="holderForm" runat="server">
    <p>Hello World!</p>
</asp:Content>
<asp:Content ContentPlaceHolderID="holderFooter" runat="Server">
    Some footer content
</asp:Content>

Best Answer

I've been working with nested master pages and have run in to something similar. From what I see where you have "Some footer here" in the Site.Master is where the problem lies and I've had similar problems with having content with-in a contentplaceholder tag. if you try this instead

<asp:ContentPlaceHolder ID="holderFooter" runat="server"/>Some footer here

Then you should be able to see the footer content.

Related Solutions

C# – Should ‘using’ directives be inside or outside the namespace

There is actually a (subtle) difference between the two. Imagine you have the following code in File1.cs:

// File1.cs
using System;
namespace Outer.Inner
{
    class Foo
    {
        static void Bar()
        {
            double d = Math.PI;
        }
    }
}

Now imagine that someone adds another file (File2.cs) to the project that looks like this:

// File2.cs
namespace Outer
{
    class Math
    {
    }
}

The compiler searches Outer before looking at those using directives outside the namespace, so it finds Outer.Math instead of System.Math. Unfortunately (or perhaps fortunately?), Outer.Math has no PI member, so File1 is now broken.

This changes if you put the using inside your namespace declaration, as follows:

// File1b.cs
namespace Outer.Inner
{
    using System;
    class Foo
    {
        static void Bar()
        {
            double d = Math.PI;
        }
    }
}

Now the compiler searches System before searching Outer, finds System.Math, and all is well.

Some would argue that Math might be a bad name for a user-defined class, since there's already one in System; the point here is just that there is a difference, and it affects the maintainability of your code.

It's also interesting to note what happens if Foo is in namespace Outer, rather than Outer.Inner. In that case, adding Outer.Math in File2 breaks File1 regardless of where the using goes. This implies that the compiler searches the innermost enclosing namespace before it looks at any using directive.

C# – Find Textbox control

I've recently started doing this the 'modern' LINQ way. First you need an extension method to grab all the controls of the type you're interested in:

//Recursively get all the formControls  
public static IEnumerable<Control> GetAllControls(this Control parent)  
{  
     foreach (Control control in parent.Controls)  
        {  
            yield return control;  
            foreach (Control descendant in control.GetAllControls())  
            {  
                yield return descendant;  
            }  
     }  
}`

Then you can call it in your webform / control:

var formCtls = this.GetAllControls().OfType<Checkbox>();

foreach(Checkbox chbx in formCtls){

//do what you gotta do ;)}

Regards,
5arx

Best Answer

Related Solutions

C# – Should ‘using’ directives be inside or outside the namespace

C# – Find Textbox control

Related Topic