Question

In my ASP.NET app I have a control in the master page that raises an event Foo on certain occasions / interactions.

I also have a couple of pages that have another control that must re-bind itself when this event is fired.

Unfortunately the only way I can see them communicating between each other is by creating a long event chain (deriving a new MasterPage MasterPageSuperDuper, attaching an event handler to Foo‘s event in the user control, and then referring to this event in the masterpage from the control present in a couple of pages – basically using the masterpage as a control center).

Is it possible to raise an event the page control can see without getting the masterpage involved?

Answer 1

Here we go.

Create an Interface, put in app_code folder

public interface IBinder
{
    void Bind();
}

PageControl Implement Interface

public partial class WebUserControl2 : System.Web.UI.UserControl, IBinder
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public void Bind()
    {
    }
}

In your Control on the masterpage

public partial class WebUserControl1 : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void butRaiseEvent_Click(object sender, EventArgs e)
    {
        CheckSub(this.Parent.Parent.Controls);
    }

    private void CheckSub(ControlCollection cc)
    {
        foreach (Control c in cc)
        {
            if (c is IBinder)
                ((IBinder)c).Bind();
            else
                CheckSub(c.Controls);
        }
    }
}

Let me know if it works.