WPF EventSetter 写法

FuckPatience2024-05-12 9:25

感觉这玩意之前一直没用过，可能在容器里用到的比较多吧，记录一下。

第一种代码法：

cs 复制代码

      Style itemContainerStyle = new Style(typeof(ListBoxItem));
            itemContainerStyle.Setters.Add(new Setter(ListBoxItem.AllowDropProperty, true));
            itemContainerStyle.Setters.Add(new EventSetter(ListBoxItem.PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(s_PreviewMouseLeftButtonDown)));
            itemContainerStyle.Setters.Add(new EventSetter(ListBoxItem.DropEvent, new DragEventHandler(listbox1_Drop)));
            listbox1.ItemContainerStyle = itemContainerStyle;

第二种xaml法：

XML 复制代码

<ListBox>
    <ListBox.Resources>
        <Style TargetType="ListBoxItem">
            <Setter Property="AllowDrop" Value="True" />
            <EventSetter Event="PreviewMouseLeftButtonDown" Handler="s_PreviewMouseLeftButtonDown" />
            <EventSetter Event="Drop" Handler="listbox1_Drop" />
        </Style>
    </ListBox.Resources>
</ListBox>

如果使用MVVM框架可以使用Binding:

XML 复制代码

<EventSetter Event="PreviewMouseLeftButtonDown" Handler="{Binding s_PreviewMouseLeftButtonDown}" />
            <EventSetter Event="Drop" Handler="{Binding listbox1_Drop}" />