[英]Override property of custom control style in XAML
I borrowed some code from some other guy here on Stack Overflow.我从 Stack Overflow 上的其他人那里借用了一些代码。 I have two PasswordBoxes.我有两个密码框。 I want the first one to show "Password" and the second one to show "Re-enter Password".我希望第一个显示“密码”,第二个显示“重新输入密码”。 I don't want to rewrite the complete style all over again if the only difference is the text in the TextBlock.如果唯一的区别是 TextBlock 中的文本,我不想重新编写完整的样式。 How can I override and change the value of the TextBlock, if the TargetType has to be PasswordBox?如果 TargetType 必须是 PasswordBox,如何覆盖和更改 TextBlock 的值? I'm trying to create a second style that is based on the first one, and then change it from there, but I'm not sure about the syntax.我正在尝试创建基于第一个样式的第二个样式,然后从那里更改它,但我不确定语法。
This one works fine:这个工作正常:
<Style x:Name="customPWBStyle" x:Key="customPasswordBox"
TargetType="{x:Type PasswordBox}">
<Setter Property="helper:PasswordBoxMonitor.IsMonitoring"
Value="True"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type PasswordBox}">
<Border Name="Bd"
Background="{TemplateBinding Background}"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
SnapsToDevicePixels="true">
<Grid>
<ScrollViewer x:Name="PART_ContentHost"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
<TextBlock Text="Password"
Margin="4, 2, 0, 0"
Foreground="Gray"
Visibility="Collapsed"
Name="txtPrompt" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled"
Value="false">
<Setter TargetName="Bd"
Property="Background"
Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
<Trigger Property="helper:PasswordBoxMonitor.PasswordLength" Value="0">
<Setter Property="Visibility" TargetName="txtPrompt" Value="Visible"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
But I want to create another style identical, but the only difference has to be the TextBlock that has to say "Re-enter password"但我想创建另一种相同的样式,但唯一的区别必须是必须说“重新输入密码”的 TextBlock
This is what I got so far:这是我到目前为止得到的:
<Style x:Key="reEnterPasswordBox" BasedOn="{StaticResource customPasswordBox}" TargetType="{x:Type PasswordBox}">
<Style.Resources>
<Style TargetType="TextBlock">
<Setter Property="Text" Value="Re-enter Password"></Setter>
</Style>
</Style.Resources>
</Style>
However it does not work.但是它不起作用。 I can see that theres a name for the TextBlock, which is txtPrompt, but I'm not sure if its possible to use that as a reference for chaning the value of the TextBlock.我可以看到 TextBlock 有一个名称,即 txtPrompt,但我不确定是否可以将其用作更改 TextBlock 值的参考。
I would recommend to create a special dependency property in customPasswordBox, eg InputHint.我建议在 customPasswordBox 中创建一个特殊的依赖属性,例如 InputHint。 (If you can't change customPasswordBox code, make a custom attached dependency property - like helper:PasswordBoxMonitor.IsMonitoring. Attached DPs are great for parametrizing templates) (如果您无法更改 customPasswordBox 代码,请创建自定义附加依赖项属性 - 如 helper:PasswordBoxMonitor.IsMonitoring。附加 DP 非常适合参数化模板)
When you have a property, set default value via Setter, and then bind TextBlock to it via TemplateBinding.当你有一个属性时,通过 Setter 设置默认值,然后通过 TemplateBinding 将 TextBlock 绑定到它。
<Style x:Name="customPWBStyle" x:Key="customPasswordBox"
TargetType="{x:Type PasswordBox}">
<Setter Property="helper:PasswordBoxMonitor.IsMonitoring" Value="True"/>
<Setter Property="InputHint" Value="Password"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type PasswordBox}">
<Border Name="Bd"
Background="{TemplateBinding Background}"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
SnapsToDevicePixels="true">
<Grid>
<ScrollViewer x:Name="PART_ContentHost"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
<TextBlock Text="{TemplateBinding InputHint}"
Margin="4, 2, 0, 0"
Foreground="Gray"
Visibility="Collapsed"
Name="txtPrompt" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled"
Value="false">
<Setter TargetName="Bd"
Property="Background"
Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
<Trigger Property="helper:PasswordBoxMonitor.PasswordLength" Value="0">
<Setter Property="Visibility" TargetName="txtPrompt" Value="Visible"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
to make another style, change only Setter for InputHint:要制作另一种样式,只需更改 InputHint 的 Setter:
<Style x:Key="reEnterPasswordBox" BasedOn="{StaticResource customPasswordBox}" TargetType="{x:Type PasswordBox}">
<Setter Property="InputHint" Value="Re-enter Password"/>
</Style>
Parts of template are not easily reachable for modification, even with implicit styles即使使用隐式样式,模板的某些部分也不容易修改
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