Question

我已经为WPF按钮实现了一些触发器，如下所示：

   <ControlTemplate.Triggers>
        <EventTrigger RoutedEvent="DragOver">
            <BeginStoryboard Storyboard="{StaticResource swap}"/>
            <BeginStoryboard Storyboard="{StaticResource fadein}"/>
        </EventTrigger>

        <EventTrigger RoutedEvent="DragLeave">
            <BeginStoryboard Storyboard="{StaticResource reset}"/>
            <BeginStoryboard Storyboard="{StaticResource fadeout}"/>
        </EventTrigger>

        <EventTrigger RoutedEvent="Drop">
            <BeginStoryboard Storyboard="{StaticResource reset}"/>
            <BeginStoryboard Storyboard="{StaticResource fadeout}"/>
        </EventTrigger>
    </ControlTemplate.Triggers>

这在Visual Studio 2015中完美运行，但在Visual Studio 2008中，它会被抛出错误：

Cannot convert string 'DragOver' in attribute 'RoutedEvent' to object of type 'System.Windows.RoutedEvent'

我已将事件触发器中的上述路由事件更改为：

RoutedEvent =“DragOver” - ＆gt; RoutedEvent = “Mouse.DragOver”
RoutedEvent =“DragLeave” - ＆gt; RoutedEvent = “Mouse.DragLeave”
RoutedEvent =“Drop” - ＆gt; RoutedEvent = “Mouse.Drop”

xaml解析器无法识别Mouse.DragOver，Mouse.DragLeave，Mouse.Drop，它会突出显示。有什么想法吗？

Answer 1

我找到了解决方案。我需要在路由事件之前使用Button和下面的句点。现在正在努力：

   <ControlTemplate.Triggers>
        <EventTrigger RoutedEvent="Button.DragOver">
            <BeginStoryboard Storyboard="{StaticResource swap}"/>
            <BeginStoryboard Storyboard="{StaticResource fadein}"/>
        </EventTrigger>

        <EventTrigger RoutedEvent="Button.DragLeave">
            <BeginStoryboard Storyboard="{StaticResource reset}"/>
            <BeginStoryboard Storyboard="{StaticResource fadeout}"/>
        </EventTrigger>

        <EventTrigger RoutedEvent="Button.Drop">
            <BeginStoryboard Storyboard="{StaticResource reset}"/>
            <BeginStoryboard Storyboard="{StaticResource fadeout}"/>
        </EventTrigger>
    </ControlTemplate.Triggers>

WPF EventTriggers - 无法将属性“RoutedEvent”中的字符串“DragOver”转换为Visual Studio 2008中“System.Windows.RoutedEvent”类型的对象

1 个答案: