Question

我已经学会了如何在标签的content属性中格式化字符串，如下所示：

<Label Content="{Binding ElementName=theSlider, Path=Value}" 
   ContentStringFormat="The font size is {0}."/>

我想在Setter中做同样的事情但是“ValueStringFormat”不存在，在这里做我想做的正确语法是什么：

<DataTrigger Binding="{Binding Path=Kind}" Value="Task">
    <Setter TargetName="TheTitle" Property="Text" 
       Value="{Binding Title}" 
       ValueStringFormat="Your title was: {0}"/>
</DataTrigger>

Answer 1

你能简单地使用Binding本身的StringFormat属性吗？

<DataTrigger Binding="{Binding Path=Kind}" Value="Task">
    <Setter TargetName="TheTitle" Property="Text" 
        Value="{Binding Title,StringFormat='Your title was: {}{0}'}" 
        />
</DataTrigger>

Answer 2

我无法测试，但希望它有效：

...
xmlns:local="clr-namespace:ValueConverter"
...

<Window.Resources>
   <local:MyTextConverter x:Key="MyTextConverter" />
</Window.Resources>

...
<DataTrigger Value="Task">
     <DataTrigger.Binding>
        <Binding Converter="{StaticResource MyTextConverter}"
            Path="Kind" />
     </DataTrigger.Binding>
     <Setter TargetName="TheTitle" Property="Text"/>
</DataTrigger>

其中MyTextConverter是一个实现IValueConverter接口的类：

public class PositionConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, 
         CultureInfo culture)
    {
        return String.Format("Your title was: {0}", value);
    }

    public object ConvertBack(object value, Type targetType, object parameter,
        CultureInfo culture)
    {
        throw new Exception("The method or operation is not implemented.");
    }

如何在XAML Setter Value中格式化字符串？

2 个答案: