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POsilverlight binding combobox in nested controls
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  1. POsilverlight binding combobox in nested controls
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    copied!<p>I have 2 user controls one named Filters and one named FilterItem</p> <p>Filter looks like this:</p> <pre><code>&lt;UserControl xmlns:my="clr-namespace:AttorneyDashboard.Views.UserControls" x:Class="AttorneyDashboard.Views.UserControls.Filters" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:helpers="clr-namespace:AttorneyDashboard.Helpers" mc:Ignorable="d" d:DesignHeight="150" d:DesignWidth="590" x:Name="FiltersRoot"&gt; &lt;Grid&gt; &lt;ListBox x:Name="myListBox" ItemsSource="{Binding Path=FilterItems, ElementName=FiltersRoot}" &gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;my:FilterItem ColumnsList="{Binding Path=Columns_, ElementName=FiltersRoot}" /&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; &lt;/Grid&gt; &lt;/UserControl&gt; </code></pre> <p>Code Behind:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Windows.Data; using System.Collections.ObjectModel; using System.Diagnostics; using AttorneyDashboard.Helpers; namespace AttorneyDashboard.Views.UserControls { public class MyItems { public string Header { get; set; } } public partial class Filters : UserControl { public Filters() { InitializeComponent(); } private DependencyProperty FilterItemsProperty = DependencyProperty.Register("FilterItems", typeof(ObservableCollection&lt;FilterDescriptor&gt;), typeof(Filters), new PropertyMetadata(null, new PropertyChangedCallback(OnChangeFilterItems))); public ObservableCollection&lt;FilterDescriptor&gt; FilterItems { get { return (ObservableCollection&lt;FilterDescriptor&gt;)GetValue(FilterItemsProperty); } set { SetValue(FilterItemsProperty, value); } } public static void OnChangeFilterItems(DependencyObject d, DependencyPropertyChangedEventArgs e) { } public List&lt;MyItems&gt; Columns_ { get { List&lt;MyItems&gt; list = new List&lt;MyItems&gt;(); list.Add(new MyItems() { Header = "test1" }); list.Add(new MyItems() { Header = "test2" }); list.Add(new MyItems() { Header = "test3" }); return list; } } } } </code></pre> <p>FilterItems looks like this</p> <pre><code>&lt;UserControl x:Class="AttorneyDashboard.Views.UserControls.FilterItem" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="23" d:DesignWidth="590" xmlns:my="clr-namespace:AttorneyDashboard.Helpers" x:Name="FilterItemRoot"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;ComboBox Height="23" HorizontalAlignment="Left" Name="FieldName" VerticalAlignment="Top" Width="120" Margin="5,0,0,0" ItemsSource="{Binding Path=ColumnsList, ElementName=FilterItemRoot}" SelectedItem="{Binding PropertyPath, Mode=TwoWay}" DisplayMemberPath="Header"/&gt; &lt;/StackPanel&gt; &lt;/UserControl&gt; </code></pre> <p>Code behind:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Collections.ObjectModel; using AttorneyDashboard.Helpers; using System.Windows.Data; namespace AttorneyDashboard.Views.UserControls { public partial class FilterItem : UserControl { public FilterItem() { InitializeComponent(); } private DependencyProperty ColumnsListProperty = DependencyProperty.Register("ColumnsList", typeof(List&lt;MyItems&gt;), typeof(FilterItem), new PropertyMetadata(null, new PropertyChangedCallback(OnChangeColumns))); public List&lt;MyItems&gt; ColumnsList { get { return (List&lt;MyItems&gt;)GetValue(ColumnsListProperty); } set { SetValue(ColumnsListProperty, value); } } public static void OnChangeColumns(DependencyObject d, DependencyPropertyChangedEventArgs e) { } } } </code></pre> <p>The number of FilterItems is ok (this means that FilterItems binding works ok), but only the Combobox of the last FilterItem is populated... And I do not know what exactly is wrong...</p> <p><strong>Update:</strong> I found why but I stll do not know a solution... It seams that the content of FilterItem is binded before his properties are.. So the combobox in FilterItem is binded before the Columns property is binded...</p>
 

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