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POWhy this Button Command Binding is not working?
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  1. POWhy this Button Command Binding is not working?
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    copied!<p>I did this like 50 times before. I really don't know why it is not working this time. I have a WPF application and my only dependency is MahApps.Metro. I'm using it's MetroWindow and Dynamic Style on my Button.</p> <p>Here is the latest xaml:</p> <pre><code> &lt;ItemsControl Grid.Column="0" Grid.Row="1" ItemsSource="{Binding ServerList}" Margin="5"&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;Border Background="LightGray"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Button Style="{DynamicResource MetroCircleButtonStyle}" Content="{StaticResource appbar_monitor}" Command="{Binding VM.ServerSelectedCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Controls:MetroWindow}}" CommandParameter="{Binding .}"&gt;&lt;/Button&gt; &lt;Label Content="{Binding .}" HorizontalAlignment="Center" VerticalAlignment="Center"&gt;&lt;/Label&gt; &lt;/StackPanel&gt; &lt;/Border&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; </code></pre> <p>Here is my ServerSelectedCommand in my ViewModel:</p> <pre><code> private ViewModelCommand _ServerSelectedCommand; public ViewModelCommand ServerSelectedCommand { get { if (_ServerSelectedCommand == null) { _ServerSelectedCommand = new ViewModelCommand( p =&gt; { SelectServer(p); }, p =&gt; true ); } return _ServerSelectedCommand; } set { _ServerSelectedCommand = value; } } private void SelectServer(object parameter) { } </code></pre> <p>ViewModelCommand class is like RelayCommand. Here it is:</p> <pre><code>public class ViewModelCommand : Observable, ICommand { public bool CanExecuteValue { get { return CanExecute(null); } } public ViewModelCommand( Action&lt;object&gt; executeAction, Predicate&lt;object&gt; canExecute) { if (executeAction == null) throw new ArgumentNullException("executeAction"); _executeAction = executeAction; _canExecute = canExecute; } private readonly Predicate&lt;object&gt; _canExecute; public bool CanExecute(object parameter) { return _canExecute == null ? true : _canExecute(parameter); } public event EventHandler CanExecuteChanged; public void OnCanExecuteChanged() { OnPropertyChanged(() =&gt; CanExecuteValue); if (CanExecuteChanged != null) CanExecuteChanged(this, EventArgs.Empty); } private readonly Action&lt;object&gt; _executeAction; public void Execute(object parameter) { _executeAction(parameter); } } </code></pre> <p>Sorry for a lot of code. But I need to add them in order to find the problem which I can't see. So lets turn back to first xaml, that is the latest one I tried. Here are the codes that I tried for problematic Button line.</p> <pre><code>Command="{Binding ServerSelectedCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ItemsControl}}" Command="{Binding ServerSelectedCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:ViewModel}}}" </code></pre> <p>This also doesn't provide anything!</p> <pre><code>Command="{Binding RelativeSource={RelativeSource AncestorType=Controls:MetroWindow}}" </code></pre> <p>Thanks!</p>
 

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