How to add custom XAML attributes to a class that inherits UserControl?

I have a custom UserControl and I want to give it a custom property "MyProperty" which I can set in XAML. So that my XAML will look like this:

<EventDet:EventAddressControl 
            MyCustomProperty="formattype"     
            x:Name="EventSessionLocationContr开发者_如何学编程ol"/>

How do I give the UserControl a custom attribute / property which I can then set in XAML?

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If you are using CLRProperty you cannot use for Binding purpose.

 public partial class MyCustomControl : UserControl
{
    public MyCustomControl()
    {
        InitializeComponent();
    }

    public string MyCLRProperty { get; set; }

    public string MyProperty
    {
        get { return (string)GetValue(MyPropertyProperty); }
        set { SetValue(MyPropertyProperty, value); }
    }

    // Using a DependencyProperty as the backing store for MyProperty.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty MyPropertyProperty =
        DependencyProperty.Register("MyProperty", typeof(string), typeof(MyCustomControl ));
}

 <my:MyCustomControl MyProperty="{Binding BindingProperty}"
                     MyCLRProperty="MyCLRProperty"/>

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Just put a normal DependencyProperty in your class.

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If you just want to set the value from xaml then you can use a regular property. If you want to use the property with triggers, styles, etc then you would need to use a dependency property to take advantage of those WPF features