小编Mym*_*uma的帖子

<Canvas>
    <Button Name="b1" Content="Button"/>
    <Rectangle Name="Mr1" Fill="Black">
        <Rectangle.Triggers>
            <EventTrigger SourceName="b1" RoutedEvent="Button.Click">
                <BeginStoryboard>
                 <code.../>
                </BeginStoryboard>
            </EventTrigger>
        </Rectangle.Triggers>
    </Rectangle>
</Canvas>

错误：找不到 b1。

请帮帮我，谢谢。