Question

这两个按钮;启用一个，并禁用具有样式的一个。任何人都可以找出原因吗？

<Button Command="{Binding ResolveHostsCommand}" VerticalAlignment="Center" IsEnabled="{Binding CanUserUpdateHosts}" Grid.Column="0" Content="Resolve" />

<Button VerticalAlignment="Center" IsEnabled="False" Content="Cancel" Grid.Column="1">
    <Button.Style>
        <Style TargetType="Button">
            <Style.Triggers>
                <DataTrigger Binding="{Binding CanUserUpdateHosts}" Value="True">
                    <Setter Property="IsEnabled" Value="True"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

Answer 1

即使将CanUserUpdateHosts设置为true，Style.Setter也不能覆盖您在Button声明中提供的显式值。请参阅Dependency Property Value Precedence页面。触发器中的样式设置器位于＃6，而显式值为＃3。

您需要反转逻辑，如下所示：

<Button Command="{Binding ResolveHostsCommand}" VerticalAlignment="Center" IsEnabled="{Binding CanUserUpdateHosts}" Grid.Column="0" Content="Resolve" />
<Button  VerticalAlignment="Center" Content="Cancel" Grid.Column="1">
    <Button.Style>
        <Style TargetType="Button">
            <Style.Triggers>
                <DataTrigger Binding="{Binding CanUserUpdateHosts}" Value="False">
                    <Setter Property="IsEnabled" Value="False"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

或者你可以使用你的Style的Setter将IsEnabled设置为false，如下所示：

<Button Command="{Binding ResolveHostsCommand}" VerticalAlignment="Center" IsEnabled="{Binding CanUserUpdateHosts}" Grid.Column="0" Content="Resolve" />
<Button  VerticalAlignment="Center" Content="Cancel" Grid.Column="1">
    <Button.Style>
        <Style TargetType="Button">
            <Setter Property="IsEnabled" Value="False"/>
            <Style.Triggers>
                <DataTrigger Binding="{Binding CanUserUpdateHosts}" Value="True">
                    <Setter Property="IsEnabled" Value="True"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

Answer 2

您将IsEnabled标记为false。

<Button VerticalAlignment="Center" IsEnabled="False"...>

顽皮的按钮样式行为不端

2 个答案: