Create your own click event handler for the WPF user control that contains the?

Question

Have you ever had a problem assigning a click event handler to a custom WPF user control using a nested button control? I do.

When you put such a user control in the main window, let Main.xaml say, MouseLeftButtonDown doesn't work, but PreviewMouseLeftButtonDown works like a charm.

But imagine that you tell each developer in your team about using this event when using your usercontrol ... Some user controls in your library have MouseLeftButtonDown, others PreviewMouseLeftButtonDown .... This is a mess, do you disagree?

So, I have a solution, but I want someone to see if there is any elegant way to create your special event handler named "Click".

In my usercontrol called CustomButton.xaml.cs, I still have:

public partial class CustomButton: UserControl
{

    public CustomButton()
        : base()
    {
        this.InitializeComponent();

    }

    public delegate void ClickHandler(object sender, EventArgs e);
    public event EventHandler Click;

    public void Button_Click(object sender, RoutedEventArgs e) {//execute daddy button click
            (((sender as Button).Parent as Grid).Parent as CustomButton).Click(sender, e);

            e.Handled = false;

    }

In my CustomButton.xaml

<UserControl
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"
x:Class="YourCompany.UI.Controls.CustomButton" d:DesignHeight="72.5" d:DesignWidth="200">
<UserControl.Resources>
blablabla
</UserControl.Resources>

<Grid x:Name="LayoutRoot">
    <Button Style="{DynamicResource CustomButton}" 
            Width="{Binding ElementName=CustomButton, Path=ActualWidth}" 
            Cursor="Hand" Foreground="#ffffff" FontSize="28" Margin="8,8,0,12" 
            HorizontalAlignment="Left" 
            Content="Custom Button" Click="Button_Click" />


</Grid>

Now in my Main.xaml calling I:

<Window x:Class="YourCompany.MyProject.Main"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MyProject!" Height="600" Width="800" 
MinWidth="800" MinHeight="600" WindowState="Maximized" WindowStartupLocation="CenterScreen"
xmlns:bigbola="clr-namespace:YourCompany.UI.Controls;assembly=YourCompany.UI.Controls">

<mycontrols:CustomButton Name="test" MyImage=".\Images\btnOptions.png" Cursor="Hand" 
            Texto="See options" Click="test_Click"
            Margin="168.367,176.702,253.609,0" ToolTip="See all options" Height="76.682" 
            VerticalAlignment="Top"></mycontrols:CustomButton>

Explanation:

in usercontrol, when you click a nested button, it executes its parent user "Click" handler.

Is there an elegant way to achieve the same effect?

Answer 1

, mdm20 ... UserControl ( , 1), CustomControl ( , , )? , , CustomButton, CustomControl , (UserControl).

UserControl vs CustomControl

, !

Answer 2

, ?

, , .

if (Click != null) Click(this, EventArgs.Empty);

Answer 3

:

(((sender as Button).Parent as Grid).Parent as CustomButton).Click(sender, e);

this.Click(sender, e);

?

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