Question

I am having three master pages like Master-Green, Master-Bule, Master-Red. In each master page having three buttons named as green, blue and red.
Now my default master is green,

It’s assigned a page Default.aspx. At this time three button also display on the top.

How to make so clicking “blue” button means the Master-Blue shold be master page for the current page?

Answer 1

1. In the Master Page use input type submit button

<input type=”submit” name=”btnGreen” value=”Green” />

<input type=”submit” name=”btnBlue” value=”Blue” />

2.Then from the code behind you can check the name of the button clicked, in the Request object in the Page_PreInit event

public partial class Default : System.Web.UI.Page
{
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (Request["btnGreen"] != null)
        {
            Page.MasterPageFile = "/Green.Master";
        }
        else if (Request["btnBlue"] != null)
        {
            Page.MasterPageFile = "/Blue.Master";
        }
    }

}