Question

I have a.master and b.aspx .

i have some functions in my aspx page.

how to access that functions in a.master page.

thank you

Answer 1

Let’s say, you want to call Foo from b.aspx from a.master. So first thing is that you have make the method internal (or public) and then you can use code such as below in master page is call that method.

var page = (b)this.Page;
page.Foo();

Note that b will be the code behind class name in b.aspx. Note that above code will fail if you use another page c.aspx and use the same master a with it. Generally, I will say that invoking page specific functions from master does not make sense unless functions are present in some base page class and in such case you should be casting to that base page class.

Edit: More elaborate example as requested by Asif:

Consider your content page b.aspx such as

<%@ Page Language="C#" MasterPageFile="a.Master" Title="Page B" AutoEventWireup="true"
    CodeBehind="b.aspx.cs" Inherits="YourProject.b" %>

And in code behind file (b.aspx.cs), you have a method Foo such as

namespace YourProject
{
    public partial class b : System.Web.UI.Page
    {
            void Foo(string someParameter)
            {
                Label1.Text = someParameter
            }
        ...
    }
}

Now in code behind (a.master.cs) of a.master page

namespace YourProject
{
    public partial class a : System.Web.UI.MasterPage
    {
        protected void Page_Load(object sender, EventArgs e)
        {
           b contentPage = (b)this.Page;
           contentPage.Foo("Hello");
        }

        ....
    }
}