WPF 绑定(bind)到两个属性

Question

我有一个具有 Message 的 WPF 控件属性(property)。

我目前有这个:

 <dxlc:LayoutItem >
            <local:Indicator Message="{Binding PropertyOne}" />
 </dxlc:LayoutItem>

但我需要 Message属性绑定(bind)到两个属性。

显然不能这样做，但这可以帮助解释我想要什么:

<dxlc:LayoutItem >
            <local:Indicator Message="{Binding PropertyOne && Binding PropertyTwo}" />
 </dxlc:LayoutItem>

Answer 1

尝试使用 MultiBinding :

Describes a collection of Binding objects attached to a single binding target property.

例子:
XAML

<TextBlock>
   <TextBlock.Text>
       <MultiBinding Converter="{StaticResource myNameConverter}"
                     ConverterParameter="FormatLastFirst">
          <Binding Path="FirstName"/>
          <Binding Path="LastName"/>
       </MultiBinding>
   </TextBlock.Text>
</TextBlock>

Converter

public class NameConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        string name;

        switch ((string)parameter)
        {
            case "FormatLastFirst":
                name = values[1] + ", " + values[0];
                break;
            case "FormatNormal":
                default:
                name = values[0] + " " + values[1];
                break;
        }

        return name;
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
        string[] splitValues = ((string)value).Split(' ');
        return splitValues;
    }
}