如何创建专属面板

Question

I would like to create a panel where only one control can be enabled at a time. It should work just the way radio buttons do.

The idea is something like that:

class XClusivePanel : Panel
{
    // Init code

    // Use this in order to add Exclusive Controls
    void AddControl( Control c )
    {
        if(! Controls.Contains(c) )
        {
            Controls.Add(c);

            c.Enabled = false;

            c.EnabledChanged += new System.EventHandler( this.control_EnabledChanged );
        }
    }

    // Avoid more than one control enabled at a time.
    private void control_EnabledChanged( object sender, EventArgs e )
    {
        Control s = (Control)sender;

        if(s.Enabled == true)
        {
            foreach( Control c in Controls )
            {
                if( s != c )
                {
                    s.Enabled = false;  
                }
            }
        }
    }
}

The problem with this code is that it works only if you create your form by code; if you add components using the designer, it does not work.

Any idea? By the way, I am working with the .NET CF.

Answer 1

Why you don't use the form load event(or similar) to disable all the controls on the form (including the one added by the designer). The ones added programmatically would be then taken care by your AddControl