在 WPF 中，我可以在 2 个按钮之间共享相同的图像资源吗
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In WPF, can I share the same image resource between 2 buttons
提问by Tamar Cohen
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（如果它打开，则切换到关闭，如果它关闭，则切换到打开）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:
事件代码是，“flag”是一个布尔局部变量，初始化为真：
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，它们的行为相同。当我尝试对第二个按钮使用相同的资源时，出现异常：
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，还是必须再次将图像添加为具有不同 Key 的资源？
回答by Artiom
Set Shared in your style to false
将您的风格中的 Shared 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}" />
回答by Tilak
You should use BitmapImagefor 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 Imagewith 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;
回答by Maverik
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，但您也可以通过 Style.Triggers
Here's an example (with the assumption that Flagis a public property exposing flag):
这是一个示例（假设Flag是公共属性公开标志）：
<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>
