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POInvoke IValueConverter's ConvertBack on load
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  1. POInvoke IValueConverter's ConvertBack on load
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    copied!<p>I bind combobox (that is a part if listbox item template) to enum, the selected item is bound to the collection that is bound to listbox. <br/> I use a converter for some logic. </p> <p>The problem is that the ConvertBack is not invoked on startup, but only when I re-select the item in combobox.</p> <p>I need it to invoke also on start. </p> <pre><code>public enum FullEnum { Apple, Banana, Pear } </code></pre> <pre class="lang-xml prettyprint-override"><code>&lt;Window.Resources&gt; &lt;local:EnumConverter x:Key="enumConverter"/&gt; &lt;ObjectDataProvider x:Key="DataT" MethodName="GetValues" ObjectType="{x:Type sys:Enum}"&gt; &lt;ObjectDataProvider.MethodParameters&gt; &lt;x:Type TypeName="local:FullEnum" /&gt; &lt;/ObjectDataProvider.MethodParameters&gt; &lt;/ObjectDataProvider&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition Height="190*" /&gt; &lt;RowDefinition Height="71*" /&gt; &lt;/Grid.RowDefinitions&gt; &lt;ListBox Name="list1" Margin="0,0,0,37"&gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel&gt; &lt;TextBlock Text="{Binding Path=Label}"&gt;&lt;/TextBlock&gt; &lt;ComboBox Height="23" Width="90" ItemsSource="{Binding Source={StaticResource DataT}}" SelectedValue="{Binding Path=Oped, Converter={StaticResource enumConverter}}"&gt; &lt;/ComboBox&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; &lt;/Grid&gt; </code></pre> <pre class="lang-cs prettyprint-override"><code>List&lt;Item1&gt; list = new List&lt;Item1&gt;(); public Window1() { InitializeComponent(); list.Add(new Item1 { Label="label1" }); list.Add(new Item1 { Label = "label2" }); list.Add(new Item1 { Label = "label3" }); list1.ItemsSource = list; } public class Item1 { public FullEnum Oped { get; set; } public string Label { get; set; } } public class EnumConverterr : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { //some code } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if ((int)value != 0) return (EnumSuperior)value; return (EnumSuperior)7; } } </code></pre>
 

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