如何在xaml和c＃中为我的所有Windows中的所有背景添加更改颜色的按钮

Question

I have already changed the background color of the window (a label) that are my buttons, but it doesn't appear the other labels from the other windows to change it too. Can someone help me?

private void Button_Click(object sender, RoutedEventArgs e)
{
   label3.Background = new SolidColorBrush(Colors.Green);
}

Answer 1

Add Style as Window.Resources or Application.Resources as below:

<Window.Resources>
    <Style x:Key="MyButtonStyle" TargetType="{x:Type Button}">
        <Setter Property="Background" Value="White"/>
    </Style>
</Window.Resources>

I added button as an example as below:

<Button Name="Button1" Click="Button_Click" Style="{DynamicResource MyButtonStyle}">Button1</Button>

And, Add event handler for "Button_Click" as below:

public void Button_Click(object sender, EventArgs e)
{
    Style style = new Style { TargetType = typeof(Button) };
    style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.Green));
    Resources["MyButtonStyle"] = style;
}

Button's color will be changed to Green when you click the button.

It comes from https://mobilechos.blogspot.com/2019/04/how-to-change-button-background-color.html what is my blog.