How to add Custom Properties to WPF User Control

Question

I've my own User Control including a few buttons and etc.

I use this code to bring that UC to screen.

<AppUI:XXXX x:Name="ucStaticBtns" HorizontalAlignment="Left" Margin="484,0,0,0" VerticalAlignment="Top" Width="68" />

I've added two property like Property1 and Property2 to XXXX user control. And changed my code with

<AppUI:XXXX x:Name="ucStaticBtns" HorizontalAlignment="Left" Margin="484,0,0,0" VerticalAlignment="Top" Width="68" Property1="False" Property2="False"/>

When I add this 2 parameters to XAML page, system throws an exception like "The member 'Property1' is not recognized or is not accessible"

Here is my UC code.

 public partial class XXXX : UserControl
    {
        public event EventHandler CloseClicked;
        public event EventHandler MinimizeClicked;
        //public bool ShowMinimize { get; set; }
        public static DependencyProperty Property1Property;
        public static DependencyProperty Property2Property;
        public XXXX()
        {
            InitializeComponent();
        }

        static XXXX()
        {
            Property1Property = DependencyProperty.Register("Property1", typeof(bool), typeof(XXXX));
            Property2Property = DependencyProperty.Register("Property2", typeof(bool), typeof(XXXX));
        }

        public bool Property1
        {
            get { return (bool)base.GetValue(Property1Property); }
            set { base.SetValue(Property1Property, value); }
        }

        public bool Property2
        {
            get { return (bool)base.GetValue(Property2Property); }
            set { base.SetValue(Property2Property, value); }
        }
}

Can you help me with doing that? Thank you so much!

bsguedes · Accepted Answer · 2018-08-28 12:30:57Z

56

You can use this declaration for your DependencyProperties:

public bool Property1
{
    get { return ( bool ) GetValue( Property1Property ); }
    set { SetValue( Property1Property, value ); }
}

// Using a DependencyProperty as the backing store for Property1.  
// This enables animation, styling, binding, etc...
public static readonly DependencyProperty Property1Property 
    = DependencyProperty.Register( 
          "Property1", 
          typeof( bool ), 
          typeof( XXXX ), 
          new PropertyMetadata( false ) 
      );

This snippet can be found in Visual Studio if you type "propdp" and then TabTab. You'll need to fill the DependencyProperty's type, the name of the DependencyProperty, the class that contains it and the default value for that DependencyProperty (in my example, I put false as default).

edited Aug 28, 2018 at 12:30

answered Sep 17, 2014 at 16:38

bsguedes

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3 Comments

Informagic Over a year ago

The way VS adapts the generated code fragment (by means of propdp) to my modifications is magic. Do you know of a “cheat sheet” showing more of this?

JKH Over a year ago

After spending days wrestling data context problems, I took a step back and started again using this simple example. Pure gold.

Alan Baljeu Over a year ago

It surprises me that XAML doesn't have a way to do this. I would have thought <sys:Boolean x:Name="Property1" /> or some such would be a much cleaner way of developing controls.

Sheridan · Accepted Answer · 2014-09-17 15:59:45Z

3

You may not have declared your DependencyPropertys correctly. You can find out full details about how to create DependencyPropertys in the Dependency Properties Overview page on MSDN, but in short, they look something like this (taken from the linked page):

public static readonly DependencyProperty IsSpinningProperty = 
    DependencyProperty.Register(
    "IsSpinning", typeof(Boolean),
...
    );

public bool IsSpinning
{
    get { return (bool)GetValue(IsSpinningProperty); }
    set { SetValue(IsSpinningProperty, value); }
}

You can find further help in the DependencyProperty Class page on MSDN.

answered Sep 17, 2014 at 15:59

Sheridan

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