Question

I have a master page and I want to change his elements from different page.
Actually the goal is to create the site management page, it will be possible for example to change a master page menu.

Thanks.

Answer 1

Provide a public method in your MasterPage that changes it’s content, for example:

public void changeMenuSource(object dataSource)
{
    this.Menu.DataSource = dataSource;
    this.Menu.DataBind();
}

Then you can call it from your ContentPages as well as from any UserControl inside of any ContentPage in the following way(YourMasterPage is the actual type of the MasterPage):

((YourMasterPage)this.Page.Master).changeMenuSource(newDataSource);