Question

C#怎么动态改变TabItem的背景色

Answer 1

设定

Background 属性，

比如 item.Background = Brushes.Red;

更高级的例子：

void ChangeBackground(object sender, RoutedEventArgs e)
{
if (btn.Background == Brushes.Red)
{
btn.Background = new LinearGradientBrush(Colors.LightBlue, Colors.SlateBlue, 90);
btn.Content = "Control background changes from red to a blue gradient.";
}
else
{
btn.Background = Brushes.Red;
btn.Content = "Background";
}
}

上面的例子使用 LinearGradientBrush ，显示线性渐变