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LostFocus不触发

[英]LostFocus not firing

Got a bit stuck and could use some help. 有点卡住了,可以使用一些帮助。 To achieve: whenever click outside of the StackPanel - it Visibilty should change to Hidden. 要实现:每当在StackPanel外部单击时,“可见性”应更改为“隐藏”。

Pretty easy one, I wrote the next condition: 很简单,我写下了下一个条件:

private void pnlLeftMenu_LostFocus(object sender, RoutedEventArgs e)
    {
        if (pnlLeftMenu.IsFocused == false)
        {
            pnlLeftMenu.Visibility = Visibility.Hidden;
        }
    }

Where pnlLeftMenu is the panel, which should be triggered. 其中pnlLeftMenu是面板,应触发该面板。 Here is the xaml piece, with described properties: 这是xaml片段,具有描述的属性:

    <StackPanel x:Name="pnlLeftMenu"                    
                Orientation="Vertical" 
                Height="475" 
                HorizontalAlignment="Left" 
                VerticalAlignment="Bottom"
                Margin="57,0,0,0"
                Visibility="Hidden"
                Background="{StaticResource BlueFadedBrush}" 
                IsVisibleChanged="pnlLeftMenu_IsVisibleChanged" 
                Focusable="True"
                LostFocus="pnlLeftMenu_LostFocus" >

No worries about the fact, that it is already hidden - it is a side menu, which become vissible on button click. 不用担心,它已经被隐藏了-它是一个侧面菜单,单击按钮即可看到。 That part works fine. 那部分工作正常。

So the question is: what am I missing? 所以问题是:我想念什么? Cause when it looks like this - the click outside of the panel does't give any reaction. 原因如下:面板外部的点击没有任何反应。

can you add a click event to the parent container of stack panel and inside the click event handler try like 您可以将click事件添加到堆栈面板的父容器,并在click事件处理程序内部尝试像

   if (pnlLeftMenu.IsVisible)
    {
        pnlLeftMenu.Visibility = Visibility.Hidden;
    }

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