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POWPF How to expose fields on a UserControl
 

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  1. POWPF How to expose fields on a UserControl
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    <p>I have a simple application with just a window and a user control. The user control has a list box. The user control is positioned on the Window and I want to bind the user control's listbox to an element on the window's data context. </p> <p>The examples I've been able to find have CLR properties on the user control which are accessed in code not via XAML. </p> <pre><code>&lt;Window x:Class="WpfApplication2b.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:WpfApplication2b="clr-namespace:WpfApplication2b" Title="MainWindow" Height="410" Width="520"&gt; &lt;Grid&gt; &lt;WpfApplication2b:MyUserControl&gt;&lt;/WpfApplication2b:MyUserControl&gt; &lt;/Grid&gt; </code></pre> <p></p> <p>And here is the user control itself.</p> <pre><code>&lt;UserControl x:Class="WpfApplication2b.MyUserControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300"&gt; &lt;Grid Background="#FFD8AA13"&gt; &lt;ListBox Height="276" HorizontalAlignment="Left" Margin="12,12,0,0" Name="listBox1" VerticalAlignment="Top" Width="276" /&gt; &lt;/Grid&gt; </code></pre> <p></p> <p>As you can see it's just a listbox on a different coloured background. I have no idea where to go next :)</p> <p>I'm guessing that I need to add a code behind property for the list box as a dependency property?</p> <p>Edit: I've added a dependencyProperty, but I don't think I've quite got the point.</p> <pre><code> public partial class MyUserControl : UserControl { public static readonly DependencyProperty ListBoxProperty; static MyUserControl() { FrameworkPropertyMetadata md = new FrameworkPropertyMetadata(); MyUserControl.ListBoxProperty = DependencyProperty.Register("MyListBox", typeof (ListBox), typeof (MyUserControl), md); } public ListBox MyListBox { get { return (ListBox) GetValue(ListBoxProperty); } set { SetValue(ListBoxProperty, value); } } public MyUserControl() { InitializeComponent(); } } </code></pre>
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