Nov 04, 2010 08:18 AM|florinlabou|LINK
The Empty value of your Width / Height properties is normal. You return the CompositeControl default values of its properties. The DefaultValueAttribute that decorates your properties should be set with the exact value of the default value returned by your
properties. To solve your issue, overwrite the oninit of your control:
protected override void OnInit(EventArgs e)
this.Width = "400px";
this.Height = "400px";
I didn't test this but it should work.