How can I set a property on a master page from a custom control?

Question

I have a master page.

I'm working on a testpage which inherits the master page.

the master page has a public property which is accessible to turn visibility on and off.

I have a set of controls which I can include into testpage. One of these controls needs to be able to set the visibility of a masterpage control.

Normally in a page code behind I would just say;

this.Master.ShowItem = false;

I have no idea how to be able to access this property from the custom control?

Answer 1

You just have to cast the master to the correct type. Assuming the type of your master is SiteMaster :

var master = this.Page.Master as SiteMaster;
if(master != null)  // cast failed, your master is a different type
{
    master.ShowItem = false;
}

So the navigation is:

• UserControl.Page
• Page.Master
• type cast

Answer 2

(sry due to my reputation I cant make comments, so as an answer)

Hint: Make sure that the Property you want to access in the master page is set to public.

Heeding this the solution of Tim Schmelter works fine.

Answer 3

I don't believe you can set a property of master page directly. But you can find the control of the master page and made them visible/invisible from conternt page like this:

((Label)this.Page.Master.FindControl("IdOfTYurControl")).Visible = false;