MVVM C# WPF binding mouse double click

问题:

I want to copy the content of one text box to another text box by clicking the mouse.

How do I bind a mouse click event?

回答1:

This sample is for RightClick, but you can adjust the event according to your needs:

<TextBox>
    <TextBox.InputBindings>
        <MouseBinding Gesture="RightClick" Command="{Binding YourCommand}" />
    </TextBox.InputBindings>
</TextBox>

Edit: I uploaded on my SkyDrive a sample app that illustrates how to use this method in order to achieve exactly what you need. Please be advised that it will only work for .NET Framework 4+

回答2:

Want to add a behavior to a control ? Just use the Ramora pattern !

回答3:

It sounds like you are inventing a new behaviour for your textbox :)

I would just consider if the users of your program understands and likes this behaviour.

Maybe it is easier to understand the funcionality if it is just a button you have to click - it is also faster to implement :)

回答4:

I think you could bind mouse gestures to commands. Take a look at this: http://www.thejoyofcode.com/Invoking_a_Command_on_a_Double_Click_or_other_Mouse_Gesture.aspx

回答5:

I'm not sure what exactly you're wanting to bind to.

There is no readily available MouseClick event as far as i'm aware.

the Click event as you'd find on a Button is inherited from ButtonBase and is not readily available on most controls.

MouseDoubleClick is inherited from Control and available on anythning deriving from it.

in your example it sounds like a simple Button with its Click event handled might do the trick.

To bind to the click event, you just need to specify the event handler for the event in the Button.

Something like:

XAML:

<TextBox Name=TextBoxOne />
<TextBox Name=TextBoxTwo />

<Button Click="CopyTextButton_Click"/>

And in your code behind:

void CopyTextButton_Click(object sender, RoutedEventArgs e)
{
    //Copy the text and anything else you need done
}

Otherwise if this is a more specialised scenario, you might want to investigate using a UserControl or as AndrewS answered above, a Command.

Hope it helps.

回答6:

Hope this helps

Use this code for TreeView

<TreeView commandBehaviors:MouseDoubleClick.Command="{Binding YourCommand}"
          commandBehaviors:MouseDoubleClick.CommandParameter="{Binding}"
          .../>

Use this code for TreeViewItem

<TreeView ItemsSource="{Binding Projects}">
    <TreeView.ItemContainerStyle>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="commandBehaviors:MouseDoubleClick.Command"
                    Value="{Binding YourCommand}"/>
            <Setter Property="commandBehaviors:MouseDoubleClick.CommandParameter"
                    Value="{Binding}"/>
        </Style>
    </TreeView.ItemContainerStyle>
</TreeView>

Use this code to create a new behavior MouseDoubleClick

public class MouseDoubleClick
{
    public static DependencyProperty CommandProperty =
        DependencyProperty.RegisterAttached("Command",
        typeof(ICommand),
        typeof(MouseDoubleClick),
        new UIPropertyMetadata(CommandChanged));

    public static DependencyProperty CommandParameterProperty =
        DependencyProperty.RegisterAttached("CommandParameter",
                                            typeof(object),
                                            typeof(MouseDoubleClick),
                                            new UIPropertyMetadata(null));

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

    public static void SetCommandParameter(DependencyObject target, object value)
    {
        target.SetValue(CommandParameterProperty, value);
    }
    public static object GetCommandParameter(DependencyObject target)
    {
        return target.GetValue(CommandParameterProperty);
    }

    private static void CommandChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
    {
        Control control = target as Control;
        if (control != null)
        {
            if ((e.NewValue != null) && (e.OldValue == null))
            {
                control.MouseDoubleClick += OnMouseDoubleClick;
            }
            else if ((e.NewValue == null) && (e.OldValue != null))
            {
                control.MouseDoubleClick -= OnMouseDoubleClick;
            }
        }
    }

    private static void OnMouseDoubleClick(object sender, RoutedEventArgs e)
    {
        Control control = sender as Control;
        ICommand command = (ICommand)control.GetValue(CommandProperty);
        object commandParameter = control.GetValue(CommandParameterProperty);
        command.Execute(commandParameter);
    }
}

回答7:

You can easily do this by creating a new behavior.

<TextBox 
    MouseDoubleClick="SelectAddress" 
    GotKeyboardFocus="SelectAddress" 
    PreviewMouseLeftButtonDown="SelectivelyIgnoreMouseButton" />

Here's the code behind:

private void SelectAddress(object sender, RoutedEventArgs e)
{

    TextBox tb = (sender as TextBox);
    if (tb != null)
    {
        tb.SelectAll();
    }

}

private void SelectivelyIgnoreMouseButton(object sender, 
        MouseButtonEventArgs e)

{

    TextBox tb = (sender as TextBox);
    if (tb != null)
    {
         if (!tb.IsKeyboardFocusWithin)
        {
            e.Handled = true;
            tb.Focus();
        }
    }
}

Please update this snippet according to your need.