How to determine which Child Page is being displayed from Master Page?

Question

I'm writing code on the master page, and I need to know which child (content) page is being displayed. How can I do this programmatically?

Answer 1

I use this:

string pageName = this.ContentPlaceHolder1.Page.GetType().FullName;

It returns the class name in this format "ASP.default_aspx", but I find that easy to parse for most purposes.

Answer 2

It's better to let the ContentPage notify the MasterPage. That's why the ContentPage has a Master Property and MasterPage does not have Child property. Best practice in this is to define a property or method on the MasterPage and use this through the Master property of the ContentPage.

If you use this technique it's best to explicitly specify the class name for the MasterPage. This makes to use the MasterPage in the ContentPage.

Example:

//Page_Load
MyMaster m = (MyMaster)this.Master;

m.TellMasterWhoIAm(this);