在WPF中，我可以在2个按钮之间共享相同的图像资源

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:

我想在WPF中创建一个On / Off按钮，我想让它在用户点击它时改变它的外观（如果它在关闭时切换到关闭，如果它关闭切换到打开）使用图像。我将要使用的图像添加到资源中：

 <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>

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

而事件代码是，“flag”是一个布尔局部变量，初始化为true：

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

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:

现在我需要创建2个开/关按钮，其行为相同。当我尝试为第二个按钮使用相同的资源时，我得到了一个例外：

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

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?

我可以在第二个按钮中使用相同的图像资源，还是必须将图像作为具有不同密钥的资源再次添加？

3 个解决方案

#1

You should use BitmapImage for image sharing.

您应该使用BitmapImage进行图像共享。

<BitmapImage x:Key="Off1" UriSource="/WPFApplication;component/Images/off_button.png" Height="30" Width="70" />
<BitmapImage x:Key="On1" UriSource="/WPFApplication;component/Images/on_button.png" Height="30" Width="70"/>

After that you can create Multiple Image with BitmapImage

之后，您可以使用BitmapImage创建多个图像

In XAML

在XAML中

 <Button ..>
  <Button.Content>
   <Image Source="{StaticResource Off1}" />
  </Button.Content>
 </Button>

In Code

在代码中

  Image image = new Image();
  image.Source = FindResource("Off1");
  OnOff1Btn.Content = image;

#2

Set Shared in your style to false

将您的样式中的共享设置为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}" />

#3

While @Tilak's solution is definitely one way to go, you can also do this via Style.Triggers

虽然@Tilak的解决方案绝对是一种方法，但你也可以通过Style.Triggers来实现

Here's an example (with the assumption that Flag is a public property exposing flag):

这是一个例子（假设Flag是公共属性暴露标志）：

<Button Content="{StaticResource On1}">
    <Button.Style>
        <Style>
            <Style.Triggers>
                <DataTrigger Binding="{Binding Flag}" Value="false">
                    <Setter Property="Content" Value="{StaticResource Off1}" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

#1