Question

我正在尝试根据行的类型以及是否选中行为数据网格中的不同行设置不同的颜色：

<Style TargetType="DataGridCell" x:Key="ActiveCellStyle">
    <Setter Property="Foreground" Value="Black"/>
    <Style.Triggers>
        <MultiDataTrigger>
            <MultiDataTrigger.Conditions>
                 <Condition Binding="{Binding Type}" Value="0"/>
                 <Condition Property="IsSelected" Value="False"/>
            </MultiDataTrigger.Conditions>      
            <Setter Property="Background" Value="#FFDFE6ED"/>
        </MultiDataTrigger>
        <MultiDataTrigger>
            <MultiDataTrigger.Conditions>
                 <Condition Binding="{Binding Type}" Value="0"/>
                 <Condition Property="IsSelected" Value="True"/>
            </MultiDataTrigger.Conditions>      
            <Setter Property="Background" Value="#FF6CAFF1"/>
        </MultiDataTrigger>
        ...
    </Style.Triggers>
</Style>

当我运行它时，我得到ArgumentException：key不能为null。

我该如何解决这个问题？

Answer 1

MultiTrigger使用Property而MultiDataTrigger使用Binding，则无法将它们合并。所以改变

<Condition Property="IsSelected"

到

<Condition Binding="{Binding RelativeSource={RelativeSource Self},
                             Path=IsSelected}"

它应该有效

<Style TargetType="DataGridCell" x:Key="ActiveCellStyle">
    <Setter Property="Foreground" Value="Black"/>
        <Style.Triggers>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <Condition Binding="{Binding Type}" Value="0"/>
                    <Condition Binding="{Binding RelativeSource={RelativeSource Self},
                                                 Path=IsSelected}"
                                       Value="False"/>
                </MultiDataTrigger.Conditions>
                <Setter Property="Background" Value="#FFDFE6ED"/>
            </MultiDataTrigger>
            <MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                <Condition Binding="{Binding Type}" Value="0"/>
                <Condition Binding="{Binding RelativeSource={RelativeSource Self},
                                             Path=IsSelected}"
                           Value="True"/>
            </MultiDataTrigger.Conditions>
            <Setter Property="Background" Value="#FF6CAFF1"/>
        </MultiDataTrigger>
    </Style.Triggers>
</Style>

不同DataGrid行的不同选择颜色

1 个答案: