SilverlightShow: Tip: How to declare a dependency property in Silverlight? Comments

Re: Tip: How to declare a dependency property in Silverlight?

TemalaRidha — Mon, 10 Oct 2011 11:39:40 GMT

To access this dependecy preperty you have to first acces to the namespace throught the xaml code:

xmlns:Controls="clr-namespace:YourProjcet.NameSpaceWhereYouDeclaredYourControl"

and then simply call your user control:

RE: Tip: How to declare a dependency property in Silverlight?

Narasimha — Fri, 25 Feb 2011 08:27:36 GMT

Hi All,

Ofter declare the DP. how can access the same control in my a XAML design please let me know .

RE: Tip: How to declare a dependency property in Silverlight?

Andy Bruce — Sat, 17 Jul 2010 23:42:38 GMT

Hey, thanks for this resource!

RE: Tip: How to declare a dependency property in Silverlight?

Nishanth — Wed, 12 Aug 2009 13:46:29 GMT

Below is an example.

The default value and the propertychanged handler are optional. Depends on whether you want something besides null as the default value if the setter is never called, and whether you want to execute some code when the value changes. Note that the naming of properties are important. Search/Replace "MyProperty" with whatever you want to call it, but not that the stafic DP must be names [name]Property.

public MyObjectType MyProperty
{
	get { return (MyObjectType)GetValue(MyPropertyProperty); }
	set { SetValue(MyPropertyProperty, value); } //Never put code here! Put it in onMyPropertyChanged
}

public static readonly DependencyProperty MyPropertyProperty =
	DependencyProperty.Register("MyProperty", typeof(MyObjectType), typeof(MyControl), new PropertyMetadata([DefaultValue], onMyPropertyChanged));

private static void onMyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
	MyControl obj = d as MyControl;
	//handle changed values
}

Next step is to create a Control with a Template. You can then bind this value into your control using:

You might want to see this post on how to create your own custom controls: http://www.silverlightshow.net/items/Creating-a-Silverlight-Custom-Control-The-Basics.aspx

RE: Tip: How to declare a dependency property in Silverlight?

Hector — Thu, 28 May 2009 11:54:12 GMT

so how do you make an property that expects an IEnumerable such as ItemsSource from a ComboBox, and what if you have two or more controls that you want to add a dependy property to make data-bindable? For example, if I had two ComboBoxes in your example above, the MySilverLightControl, how do I specify which ComboBox a property belongs to?