我想在(Not a )TextTrimming上应用一个选项。TextBoxTextBlock
编译器告诉我TextTrimming选项不是Textbox.
我可以做一个花哨的控件，它是 a Textblock，一旦单击它就会变成 a ，反之，一旦失去焦点，它就会变Textbox回 a 。Textblock
在采用这种方式之前，我想知道是否已经存在内置功能（或者是否有更智能的方法）来允许您这样做？
编辑：我最终想要的TextBox是修剪（完整内容将显示在工具提示中）但是当用户选择TextBox（进入“编辑模式”）时，将显示完整内容（不修剪）因此，用户将能够修改全文。当TextBox失去焦点时（返回“查看模式”），内容将再次被修剪。
谢谢
尝试这样的样式（我添加了背景颜色以使更改明显）：
<Style TargetType="TextBox">
<Setter Property="Background" Value="Yellow" />
<Style.Triggers>
<DataTrigger Binding="{Binding IsKeyboardFocused, RelativeSource={RelativeSource Self}}" Value="false">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<TextBlock Text="{TemplateBinding Text}" TextTrimming="CharacterEllipsis" Background="Red" />
</ControlTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
Dan Puzey 有一个很好的答案，但我想添加更多以使样式TextBlock 看起来像一个TextBox。
这是我想出的 XAML 样式：
<Style TargetType="TextBox">
<Style.Triggers>
<DataTrigger Binding="{Binding IsKeyboardFocused, RelativeSource={RelativeSource Self}}" Value="False">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Border BorderThickness="1" CornerRadius="1">
<Border.BorderBrush>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFABADB3" Offset="0"/>
<GradientStop Color="#FFABADB3" Offset="0.044"/>
<GradientStop Color="#FFE2E3EA" Offset="0.060"/>
<GradientStop Color="#FFE3E9EF" Offset="1"/>
</LinearGradientBrush>
</Border.BorderBrush>
<TextBlock Padding="4,2,0,0" Text="{TemplateBinding Text}" TextTrimming="CharacterEllipsis"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
这是控件在没有键盘焦点时的样子：
这是获得键盘焦点后控件的样子：
我想你要找的是这个
<TextBox Text="{Binding Path=String, Converter={StaticResource StringConverter}, ConverterParameter=Trim:Argument:AnotherArgument}" />
我希望它有帮助:)
如果需要，它将调用修剪函数并传递任何参数。您还可以使用 split 并将分隔符作为参数传递。
您可以在此处找到有关 Binding.Converter 的更多信息
我会使用不同的控件模板：当文本框没有聚焦时带有修剪的模板，而文本框聚焦我会使用常规模板来允许文本选择。需要替换 TextBox 控件模板。
<ControlTemplate TargetType="{x:Type TextBox}"
x:Key="ControlTemplateTextBoxNormal">
<Border Background="{TemplateBinding Background}"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}">
<Grid>
<Border x:Name="ErrorElement"
Visibility="Collapsed"
BorderThickness="1.25"
BorderBrush="{StaticResource BrushError}">
<Grid>
<Polygon x:Name="toolTipCorner"
Panel.ZIndex="2"
Margin="-1"
Points="9,9 9,0 0,0"
Fill="{StaticResource BrushError}"
HorizontalAlignment="Right"
VerticalAlignment="Top">
<Polygon.ToolTip>
<ToolTip Style="{StaticResource ToolTipStyleError}"
Content="{Binding (Validation.Errors)[0].ErrorContent, RelativeSource={RelativeSource TemplatedParent}}" />
</Polygon.ToolTip>
</Polygon>
</Grid>
</Border>
<ScrollViewer x:Name="PART_ContentHost"
Padding="{TemplateBinding Padding}"
BorderThickness="0"
IsTabStop="False"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
TextElement.Foreground="{TemplateBinding Foreground}" />
<TextBlock Text="{Binding Path=(behaviors:TextBoxBehaviors.WatermarkText), RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
IsHitTestVisible="False"
Visibility="Collapsed"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}"
Foreground="Gray"
x:Name="watermark" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsFocused"
Value="False">
<Setter Property="Visibility"
TargetName="watermark"
Value="Visible" />
</Trigger>
<Trigger Property="Validation.HasError"
Value="True">
<Setter Property="Visibility"
TargetName="ErrorElement"
Value="Visible" />
</Trigger>
<!--<Trigger Property="behaviors:TextBoxBehaviors.WatermarkText"
Value="True">
<Setter Property="Visibility"
TargetName="ErrorElement"
Value="Visible" />
</Trigger>-->
</ControlTemplate.Triggers>
</ControlTemplate>
<Style TargetType="{x:Type TextBox}"
BasedOn="{StaticResource {x:Type TextBox}}"
x:Key="TextBoxStyleTrimming">
<Setter Property="BorderThickness"
Value="1" />
<Setter Property="Validation.ErrorTemplate"
Value="{x:Null}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<Border Background="{TemplateBinding Background}"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}">
<Grid>
<Border x:Name="ErrorElement"
Visibility="Collapsed"
BorderThickness="1.25"
BorderBrush="{StaticResource BrushError}">
<Grid>
<Polygon x:Name="toolTipCorner"
Panel.ZIndex="2"
Margin="-1"
Points="9,9 9,0 0,0"
Fill="{StaticResource BrushError}"
HorizontalAlignment="Right"
VerticalAlignment="Top">
<Polygon.ToolTip>
<ToolTip Style="{StaticResource ToolTipStyleError}"
Content="{Binding (Validation.Errors)[0].ErrorContent, RelativeSource={RelativeSource TemplatedParent}}" />
</Polygon.ToolTip>
</Polygon>
</Grid>
</Border>
<TextBlock Padding="{TemplateBinding Padding}"
Text="{TemplateBinding Text}"
TextTrimming="CharacterEllipsis"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
TextElement.Foreground="{TemplateBinding Foreground}" />
<TextBlock Text="{Binding Path=(behaviors:TextBoxBehaviors.WatermarkText), RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type TextBox}}}"
IsHitTestVisible="False"
Visibility="Collapsed"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}"
Foreground="Gray"
x:Name="watermark" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsFocused"
Value="False">
<Setter Property="Visibility"
TargetName="watermark"
Value="Visible" />
</Trigger>
<Trigger Property="Validation.HasError"
Value="True">
<Setter Property="Visibility"
TargetName="ErrorElement"
Value="Visible" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsKeyboardFocused"
Value="True">
<Setter Property="Template"
Value="{StaticResource ControlTemplateTextBoxNormal}" />
</Trigger>
</Style.Triggers>
</Style>
您可以为您创建一个控件模板，TextBox在聚焦时显示通常的编辑器，在TextBlock没有聚焦时显示修剪。