Can't get a simple Extender Provider to work

[Chris Dunaway]

I have created a simple Extender Provider and when I drop it onto a
form, it appears in the component tray, but none of the controls it is
supposed to provide a property for show the property in the
PropertyGrid!

Here is the class. The GlassButton is a custom button control that
derives from button and I just do some custom painting. I am sure I
have just omitted something simple, but I cannot see it.

I am using VS 2005.

//This code from BeepProvider.cs

using System;
using System.Componen tModel;
using System.Componen tModel.Design;
using System.Drawing. Design;
using System.Collecti ons.Generic;
using System.Diagnost ics;
using System.Text;
using System.Windows. Forms;

[ProvideProperty ("BeepWhenClick ed", typeof(GlassBut ton))]
public partial class BeepProvider : Component, IExtenderProvid er
{

Dictionary<Glas sButton, bool> _beeps;

public BeepProvider()
{
InitializeCompo nent();
_beeps = new Dictionary<Glas sButton, bool>();
}

public BeepProvider(IC ontainer container)
: this()
{
container.Add(t his);
}

bool IExtenderProvid er.CanExtend(ob ject extendee)
{
if ((extendee is GlassButton) && !(extendee is BeepProvider))
return true;
else
return false;
}

public bool GetBeepWhenClic ked(GlassButton gb)
{
return _beeps[gb];
} //end method GetBeedWhenClic ked

public void SetBeepWhenClic ked(GlassButton gb, bool value)
{
_beeps[gb] = value;
if (value)
gb.Click += new EventHandler(On Click);
else
gb.Click -= new EventHandler(On Click);
}

private void OnClick(object sender, EventArgs e)
{
System.Console. Beep(1000, 50);
}
}

//This code from BeepProvider.De signer.cs

using System.Componen tModel;
using System.Windows. Forms;

[ProvideProperty ("BeepProvider" , typeof(GlassBut ton))]
partial class BeepProvider
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.Componen tModel.IContain er components = null;

/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing ">true if managed resources should be
disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Disp ose();
}
base.Dispose(di sposing);
}

#region Component Designer generated code

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeCompo nent()
{
components = new System.Componen tModel.Containe r();
}

#endregion
}

[Chris Dunaway]

Chris Dunaway wrote:

Here is the class. The GlassButton is a custom button control that
derives from button and I just do some custom painting. I am sure I
have just omitted something simple, but I cannot see it.
It wasn't very simple or intuitive, but here is my solution:
[ProvideProperty ("BeepWhenClick ed", typeof(GlassBut ton))]
public partial class BeepProvider : Component, IExtenderProvid er
In these lines I can't use my custom control class name, it has to be
Control like this:

[ProvideProperty ("BeepWhenClick ed", typeof(Control) )]
public partial class BeepProvider : Component, IExtenderProvid er

{

Dictionary<Glas sButton, bool> _beeps;

Next, I can not use a generic dictionary but I have to use a Hashtable
like this:

Hashtable _beeps;

public BeepProvider()
{
InitializeCompo nent();
_beeps = new Dictionary<Glas sButton, bool>();
use a Hashtable here as well.

_beeps = new Hashtable();
bool IExtenderProvid er.CanExtend(ob ject extendee)
{
if ((extendee is GlassButton) && !(extendee is BeepProvider))
return true;
else
return false;
}
This part is Ok, I can use GlassButton here to restrict what controls
are extended

public bool GetBeepWhenClic ked(GlassButton gb)
public void SetBeepWhenClic ked(GlassButton gb, bool value)

These two methods had to be changed to Control rather than GlassButton
What I don't understand is why. Does anyone have any insight?

Thanks,

Chris