在 WPF 中，我可以在 2 个按钮之间共享相同的图像资源吗 [英] In WPF, can I share the same image resource between 2 buttons

问题描述

我想在 WPF 中创建一个开/关按钮，并且我希望它在用户单击它时更改其外观(如果它是打开切换到关闭，如果它关闭切换到打开)使用图像.我在资源中添加了我想使用的图片:

I want to create a On/Off button in WPF and I want it to change its appearance when the user clicks it (if it was on switch to off, if it wad off switch to on) using images. I added the images I want to use to the resources:

 <Window.Resources>
    <Image x:Key="Off1" Source="/WPFApplication;component/Images/off_button.png" Height="30" Width="70" />
    <Image x:Key="On1" Source="/WPFApplication;component/Images/on_button.png" Height="30" Width="70"/>
 </Window.Resources>

事件代码是，flag"是一个布尔局部变量，初始化为真:

And the event code is, "flag" is a Boolean local variable initialize as true:

 private void OnOff1Btn_Click(object sender, RoutedEventArgs e)
    {
        if (flag)
        {
            OnOff1Btn.Content = FindResource("Off1");
            flag = false;     
        }
        else
        {
            OnOff1Btn.Content = FindResource("On1");
            flag  = true;
        }
    }

现在我需要创建 2 个开/关按钮，它们的行为相同.当我尝试为第二个按钮使用相同的资源时，出现异常:

Now I need to create 2 on/off buttons, that behave the same. When I tried to use the same resources for the second button I got an exception:

 Specified element is already the logical child of another element. Disconnect it first.

我可以在第二个按钮中使用相同的图像资源，还是必须再次将图像添加为具有不同 Key 的资源?

Can I use the same images resources in the second button or do I have to add the images again as resources with different Key?

推荐答案

在你的风格中设置 Shared 为 false

Set Shared in your style to false

<StackPanel >
   <StackPanel.Resources>
      <Image x:Key="flag" Source="flag-italy-icon.png" Width="10" x:Shared="false"/>
   </StackPanel.Resources>

   <ContentControl Content="{DynamicResource flag}" />
   <ContentControl Content="{DynamicResource flag}" />

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