雙擊列表框項目打開瀏覽器

Question

我有一個ListBox在我的wpf窗口綁定到ObervableCollection。我想打開瀏覽器，如果有人點擊ListBox的元素（就像鏈接一樣）。有人能告訴我如何做到這一點？我用listboxviews發現了一些東西，它只能用這種方式工作，還是有辦法通過使用ListBox？

此致

塞巴斯蒂安

Answer 1

您可以將樣式添加到ListBox.ItemContainerStyle，並添加EventSetter有：

<ListBox> 
    .... 
    <ListBox.ItemContainerStyle> 
     <Style TargetType="{x:Type ListBoxItem}" BasedOn="{StaticResource {x:Type ListBoxItem}}"> 
      <EventSetter Event="MouseDoubleClick" Handler="ListBoxItem_MouseDoubleClick"/> 
     </Style> 
    </ListBox.ItemContainerStyle> 
</ListBox> 

ListBoxItem_MouseDoubleClick是你與MouseDoubleClick正確的簽名後面的代碼的方法。

Answer 2

我想解決這個問題，而不需要處理代碼隱藏中的listBoxItem雙擊事件，並且我不希望重寫listBoxItem樣式（或者定義要在第一個位置重寫的樣式）。我想在listBox被雙擊時激發一個命令。

我創建了一個附加屬性，像這樣（代碼是非常具體的，但你可以概括它爲必填項）：

public class ControlItemDoubleClick : DependencyObject { 
public ControlItemDoubleClick() 
{ 

} 

public static readonly DependencyProperty ItemsDoubleClickProperty = 
    DependencyProperty.RegisterAttached("ItemsDoubleClick", 
    typeof(bool), typeof(Binding)); 

public static void SetItemsDoubleClick(ItemsControl element, bool value) 
{ 
    element.SetValue(ItemsDoubleClickProperty, value); 

    if (value) 
    { 
     element.PreviewMouseDoubleClick += new MouseButtonEventHandler(element_PreviewMouseDoubleClick); 
    } 
} 

static void element_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e) 
{ 
    ItemsControl control = sender as ItemsControl; 

    foreach (InputBinding b in control.InputBindings) 
    { 
     if (!(b is MouseBinding)) 
     { 
      continue; 
     } 

     if (b.Gesture != null 
      && b.Gesture is MouseGesture 
      && ((MouseGesture)b.Gesture).MouseAction == MouseAction.LeftDoubleClick 
      && b.Command.CanExecute(null)) 
     { 
      b.Command.Execute(null); 
      e.Handled = true; 
     } 
    } 
} 

public static bool GetItemsDoubleClick(ItemsControl element) 
{ 
    return (bool)element.GetValue(ItemsDoubleClickProperty); 
} 

}

然後我宣佈我的列表框與附加屬性和我目標命令：

<ListBox ItemsSource="{Binding SomeItems}" 
    myStuff:ControlItemDoubleClick.ItemsDoubleClick="true"> 
<ListBox.InputBindings> 
    <MouseBinding MouseAction="LeftDoubleClick" Command="MyCommand"/> 
</ListBox.InputBindings> 
</ListBox> 

希望這會有所幫助。

Answer 3

我用來表達SDK 4.0

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" 

<i:Interaction.Triggers> 
    <i:EventTrigger EventName="MouseDoubleClick" SourceName="CaravanasListBox"> 
    <i:InvokeCommandAction Command="{Binding AccionesToolbarCommand}" CommandParameter="{x:Static local:OpcionesBarra.MostrarDetalle}" /> 
    </i:EventTrigger> 
</i:Interaction.Triggers> 

Jaimir G.

Answer 4

我已經爲了解決這一問題與射擊執行命令更新的安卓解決方案，如果雙擊列表框中的任意位置：

public class ControlDoubleClick : DependencyObject 
{ 
    public static readonly DependencyProperty CommandProperty = 
     DependencyProperty.RegisterAttached("Command", typeof(ICommand), typeof(ControlDoubleClick), new PropertyMetadata(OnChangedCommand)); 

    public static ICommand GetCommand(Control target) 
    { 
     return (ICommand)target.GetValue(CommandProperty); 
    } 

    public static void SetCommand(Control target, ICommand value) 
    { 
     target.SetValue(CommandProperty, value); 
    } 

    private static void OnChangedCommand(DependencyObject d, DependencyPropertyChangedEventArgs e) 
    { 
     Control control = d as Control; 
     control.PreviewMouseDoubleClick += new MouseButtonEventHandler(Element_PreviewMouseDoubleClick); 
    } 

    private static void Element_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e) 
    { 
     Control control = sender as Control; 
     ICommand command = GetCommand(control); 

     if (command.CanExecute(null)) 
     { 
      command.Execute(null); 
      e.Handled = true; 
     } 
    } 
} 

而在XAML聲明爲ListBox是：

<ListBox ItemsSource="{Binding MyItemsSource, Mode=OneWay}">      
     <ListBox.ItemContainerStyle> 
        <Style>        
         <Setter Property="behaviours:ControlDoubleClick.Command" Value="{Binding DataContext.MyCommand, 
            RelativeSource={RelativeSource FindAncestor, 
            AncestorType={x:Type UserControl}}}"/> 
        </Style> 
    </ListBox.ItemContainerStyle> 
</ListBox>