PasswordBox不假定样式

Question

我有以下样式定义：

<!-- Border -->
<Style x:Key="MyControlBorder" TargetType="{x:Type Border}">
    <Setter Property="BorderBrush" Value="DarkKhaki" />
    <Setter Property="Background" Value="White" />
    <Setter Property="BorderThickness" Value="1" />
    <Setter Property="CornerRadius" Value="10" />
</Style>

<!-- TextBox -->
<Style x:Key="MyTextBox" TargetType="{x:Type TextBox}">
    <Setter Property="Height" Value="30" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type TextBoxBase}">
                <Border Name="TextBoxBorder" Style="{StaticResource MyControlBorder}">
                    <ScrollViewer x:Name="PART_ContentHost"/>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<!-- PasswordBox -->
<Style x:Key="MyPasswordBox" TargetType="{x:Type PasswordBox}">
    <Setter Property="Height" Value="30" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Control}">
                <Border Name="Border" Style="{StaticResource MyControlBorder}">
                    <ScrollViewer x:Name="PART_ContentHost" />
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

和以下xaml代码：

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*" />
        <RowDefinition Height="*" />
    </Grid.RowDefinitions>
    <TextBox Grid.Row="0" Style="{StaticResource MyTextBox}" />
    <PasswordBox Grid.Row="1" Style="{StaticResource MyPasswordBox}" />
</Grid>

现在我得到了这样的结果：

​

TextBox正确地采用了这种风格，但是为什么PasswordBox不采用这种风格呢？

Answer 1

不知何故，PasswordBox的ControlTemplate中的Border不采用MyControlBorder风格。

当您像这样修改MyPasswordBox样式时...那么它就会起作用。

<Style x:Key="MyPasswordBox" TargetType="{x:Type PasswordBox}">
<Setter Property="Height" Value="30" />
<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="{x:Type Control}">
            <Border Name="Border" BorderBrush="DarkKhaki" Background="White" BorderThickness="1" CornerRadius="10">
                <ScrollViewer x:Name="PART_ContentHost" />
            </Border>
        </ControlTemplate>
    </Setter.Value>
</Setter>

​

我知道这不是最好的解决方案。但是我不明白为什么不应用MyControlBorder。当你去掉MyTextBox风格的时候，它甚至都不能工作。那么你就只剩下MyControlBorder了，MyPasswordBox ...it也不能工作。

Answer 2

如果您将Border包装在另一个Border中，一切都会正常工作(我不知道为什么)。

额外的好处是，您现在可以从相同的Style“继承”PasswordBoxes和TextBoxes，从而保持事物的完整性。

<!-- Border Style Definition -->
<Style x:Key="MyControlBorder" TargetType="Border">
    <Setter Property="BorderBrush" Value="DarkKhaki" />
    <Setter Property="Background" Value="White" />
    <Setter Property="BorderThickness" Value="1" />
    <Setter Property="CornerRadius" Value="10" />
</Style>

<!-- TextBox and PasswordBox Style -->
<Style x:Key="MyControlInputBox" TargetType="Control">
    <Setter Property="Height" Value="30" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Control}">
                <Border>
                    <Border Name="Border" Style="{StaticResource MyControlBorder}">
                        <ScrollViewer x:Name="PART_ContentHost" />
                    </Border>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<!-- TextBox -->
<Style x:Key="MyTextBox" TargetType="{x:Type TextBox}" BasedOn="{StaticResource MyControlInputBox}" />

<!-- PasswordBox -->
<Style x:Key="MyPasswordBox" TargetType="{x:Type PasswordBox}" BasedOn="{StaticResource MyControlInputBox}" />