Wpf 条件不等于时触发

我需要一个WPF下的

样式

，当多个条件已满时，该样式将设置多个属性。但是，我的一个条件的类型为

不等于

。我应该如何更改下面的

样式

，使条件变为

不等于

？即使没有

IValueConverter

，它也能实现吗

<Style>
    <Style.Triggers>
        <MultiDataTrigger>
             <MultiDataTrigger.Conditions>
                  <!--<Condition 1 here.../>-->
                  <!--<Condition 2 here.../>-->
                  <Condition Binding="{Binding Path=id}" Value="3"/>
             </MultiDataTrigger.Conditions>
             <Setter Property="Background" Value="Red"/>
             <Setter Property="Foreground" Value="Black"/>
         </MultiDataTrigger>
    </Style.Triggers>
</Style>

---

您需要一个

IValueConverter

和一些额外的标记：

    <Style>
        <Style.Triggers>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <!--<Condition 1 here.../>-->
                    <!--<Condition 2 here.../>-->
                    <Condition>
                        <Condition.Binding>
                            <Binding Path="id" Converter="{StaticResource ValueToEqualsParameterConverter}">
                                <Binding.ConverterParameter>
                                    <System:Int32>3</System:Int32>
                                </Binding.ConverterParameter>
                            </Binding>
                        </Condition.Binding>
                        <Condition.Value>
                            <System:Boolean>False</System:Boolean>
                        </Condition.Value>
                    </Condition>
                </MultiDataTrigger.Conditions>
                <Setter Property="Background" Value="Red" />
                <Setter Property="Foreground" Value="Black" />
            </MultiDataTrigger>
        </Style.Triggers>
    </Style>

---

另一个选项是在样式中将默认值定义为setter，然后实现数据触发器。在以下代码中，背景值始终为红色，值为3时除外

---

即使没有IValueConverter也能实现吗？。。。不，它不能。注意，对于枚举参数和其他类型，它将不起作用。使用

返回等于（值、参数）代码
    <Style>
        <Style.Triggers>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <!--<Condition 1 here.../>-->
                    <!--<Condition 2 here.../>-->
                    <Condition>
                        <Condition.Binding>
                            <Binding Path="id" Converter="{StaticResource ValueToEqualsParameterConverter}">
                                <Binding.ConverterParameter>
                                    <System:Int32>3</System:Int32>
                                </Binding.ConverterParameter>
                            </Binding>
                        </Condition.Binding>
                        <Condition.Value>
                            <System:Boolean>False</System:Boolean>
                        </Condition.Value>
                    </Condition>
                </MultiDataTrigger.Conditions>
                <Setter Property="Background" Value="Red" />
                <Setter Property="Foreground" Value="Black" />
            </MultiDataTrigger>
        </Style.Triggers>
    </Style>

public class ValueToEqualsParameterConverter : IValueConverter {
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { 
        return value == parameter; 
    }
    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { 
        return null; 
    }
}