Published on : Feb 28, 2010
Category : General
When you start learning Silverlight or even to some extend on a medium size project, you’ll be fine with deriving your user controls directly from
System.Windows.Controls.UserControl. But soon you’ll be in a situation to derive your user controls from your own custom user control to keep something consistent. Here are the steps
Step 1:
Create a custom user control derived from
System.Windows.Controls.UserControl. Ex:
public class EnvironmentAwareUserControl : UserControl
{
public EnvironmentSettings EnvironmentSettings { get; set; }
}
Step 2:
Once you added a new Silverlight User Control to your project, change it to
from:
public partial class SilverlightControl1 : UserControl
to:
public partial class SilverlightControl1 : EnvironmentAwareUserControl
Step 3:
This is the confusing bit (or the way Silverlight/WPF works). You need the change the XAML as well to reflect that you are deriving it from a custom control.
from :
<UserControl x:Class=”Test.UI.SilverlightControl1″
to:
<EnvironmentAwareUserControl x:Class=”Test.UI.SilverlightControl1″
or
<local:EnvironmentAwareUserControl x:Class=”Test.UI.SilverlightControl1″
xmlns:local=”clr-namespace:Test.UI.Controls”
depending on your namespace declaration.
Common Error message you’ll see when you try to figure out this “
Partial declarations of must not specify different base classes”
Nandri!
Saravana
