Dependency Properties In Windows 8.1

Dependency Properties

1. Create a windows store blank app.
   
   
   
   
2. Add a user control in app,
   
   
   
   
   
   
3. Create a textblock in usercontrol,
   

   <Grid>
       <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="50" Foreground="Aqua" />
   </Grid>

4. Create a dependency property in code behind of user control either by coding or using shortcut propdp.
   

   public string TextBlockText
   {
       get
       {
           return (string) GetValue(TextBlockTextProperty);
       }
       set
       {
           SetValue(TextBlockTextProperty, value);
       }
   }
   
   // Using a DependencyProperty as the backing store for TextBlockText. This enables animation, styling, binding, etc...
   public static readonly DependencyProperty TextBlockTextProperty =
       DependencyProperty.Register("TextBlockText", typeof(string), typeof(MyUserControl1), new PropertyMetadata(string.Empty));

5. Bind the textblock’s text property to the TextBlockText dependency property,
   

   <TextBlock Text="{Binding TextBlockText}"

6. Set datacontext for usercontrol so that the binding can work.
   

   public MyUserControl1()
   {
       this.InitializeComponent();
       (this.Content as FrameworkElement).DataContext = this;
   }

7. In main page create two instances of usercontrol to show the functioning of dependency properties.
   

   <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
       <local:MyUserControl1 x:Name="control1" TextBlockText="Control 1 text" />
       <local:MyUserControl1 x:Name="control2" TextBlockText="Control 2 text" />
   </StackPanel>

8. Run your application and check.