Question

我在2-3个地方有这个代码，并且常见的是除了绑定路径之外的样式“BidMovement”需要在其他地方更改（“AskMovement”，“StaleMovement”）。这是否可以在WPF中定义样式并在实际使用时更改某些元素（绑定路径）？

<Border Name="BidBorder" Grid.Column="0" Padding="5" Margin="5" CornerRadius="10">
   <Border.Style>
      <Style TargetType="{x:Type Border}">
         <Style.Triggers>
            <DataTrigger Binding="{Binding BidMovement}" Value="{x:Static crosses:PriceMovement.Up}">
               <Setter  Property="Background" Value="Green" />
            </DataTrigger>
            <DataTrigger Binding="{Binding BidMovement}" Value="{x:Static crosses:PriceMovement.Down}">
               <Setter  Property="Background" Value="OrangeRed" />
            </DataTrigger>
            <DataTrigger Binding="{Binding BidMovement}" Value="{x:Static crosses:PriceMovement.Stale}">
               <Setter  Property="Background" Value="DarkOrange" />
            </DataTrigger>
         </Style.Triggers>
      </Style>
   </Border.Style>
</Border>

Answer 1

创建ValueConverter，将Movements转换为Brushes。它看起来像这样：

public class MovementToBrushConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var movement = value as Movement;
        if (movement == PriceMovement.Up)
            return Brushes.Green;
        //return values for the other cases accordingly

        return Brushes.Transparent; //default
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

要使用它，请将应用程序的命名空间添加到命名空间，并将转换器作为静态资源添加到Windows资源中：

<Window //other attributes omitted for brevity
    xmlns:l="clr-namespace:YourApplication">
<Window.Resources>
    <l:MovementToBrushConverter x:Key="converter" />
</Window.Resources>

然后在边框上定义绑定并添加值转换器，如下所示：

<Border Background="{Binding BidMovement, Converter={StaticResource converter}}"></Border>

样式更改绑定路径值

1 个答案: