1

我使用控件模板重新设置了文本框的样式。样式效果很好,但在文本框中更改后,我现在无法以编程方式从文本框中获取文本值。

以下是我使用该样式的方式:

     <TextBox
        x:Name="KernTextBox"
        Style="{StaticResource MediumTextBoxStyle}"
        TextWrapping="Wrap"
        MinLines="1"
        MaxLines="5"
        VerticalScrollBarVisibility="Auto"
        TextChanged="TextChanged"
        />

这是行不通的。

  get { return KernTextBox.Text; }

这是样式:

<Style x:Key="MediumTextBoxStyle" TargetType="TextBox">
    <Setter Property="FontSize" Value="18" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="TextBox">
                <Grid>

                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="MouseOver" />
                            <VisualState x:Name="ReadOnly">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonRectangle"
                                        Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource ForegroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonText"
                                        Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource BackgroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonText"
                                        Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource ForegroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonText"
                                        Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource ForegroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonRectangle"
                                        Storyboard.TargetProperty="Fill">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource ForegroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonText"
                                        Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource BackgroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonText"
                                        Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource ForegroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ButtonText"
                                        Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame
                                            KeyTime="0"
                                            Value="{StaticResource ForegroundBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>

                        </VisualStateGroup>

                        <VisualStateGroup x:Name="CheckStates">
                            <VisualState x:Name="Checked" />
                            <VisualState x:Name="Unchecked"/>
                        </VisualStateGroup>

                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused" />
                            <VisualState x:Name="Unfocused"/>
                        </VisualStateGroup>

                    </VisualStateManager.VisualStateGroups>

                    <Rectangle 
                        x:Name="ButtonRectangle" 
                        Stroke="Transparent" 
                        UseLayoutRounding="False" 
                        Fill="{StaticResource BackgroundBrush}">
                    </Rectangle>

                    <TextBox 
                        x:Name="ButtonText" 
                        Text="{Binding Path=Text, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
                        FontSize="{TemplateBinding FontSize}"
                        HorizontalAlignment="Stretch" 
                        VerticalAlignment="Center" 
                        Margin="2 0"
                        TextWrapping="{TemplateBinding TextWrapping}"
                        MinLines="{TemplateBinding MinLines}"
                        MaxLines="{TemplateBinding MaxLines}"
                        VerticalScrollBarVisibility="{TemplateBinding VerticalScrollBarVisibility}"
                        Padding="{TemplateBinding Padding}"
                        Foreground="{StaticResource ForegroundBrush}"
                        Background="{StaticResource BackgroundBrush}"
                        >
                    </TextBox>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

编辑:

最终工作方式:

<Style 
    x:Key="TextBoxStyle" 
    TargetType="{x:Type TextBox}">
    <Setter
        Property="Foreground"
        Value="{StaticResource ForegroundBrush}" />
    <Setter
        Property="FontSize"
        Value="18" />
    <Setter 
        Property="CaretBrush"
        Value="{StaticResource ForegroundBrush}" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type TextBox}">
                <Border 
                    Name="Border"
                    Background="{StaticResource BackgroundBrush}"
                    BorderBrush="{StaticResource ForegroundBrush}"
                    BorderThickness="1" >
                    <ScrollViewer Margin="0" x:Name="PART_ContentHost"/>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsEnabled" Value="False">
                        <Setter TargetName="Border" Property="Background" Value="{StaticResource ForegroundBrush}"/>
                        <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource BackgroundBrush}"/>
                        <Setter Property="Foreground" Value="{StaticResource BackgroundBrush}"/>
                    </Trigger>
                    <Trigger Property="IsReadOnly" Value="True">
                        <Setter TargetName="Border" Property="Background" Value="{StaticResource ForegroundBrush}"/>
                        <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource BackgroundBrush}"/>
                        <Setter Property="Foreground" Value="{StaticResource BackgroundBrush}"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
4

2 回答 2

1

将文本框放在文本框内是否有原因?签出文本框的原始样式和模板并从那里进行修改。我的猜测是,文本框在内部使用 TextBoxView(隐藏在 Scrollviewer 中),并且 Text 属性不是通过 TemplateBinding 绑定的,而是在这些内部类之间计算的。因此,也许这就是您无法将文本属性绑定到控件模板中的文本框文本的原因。

于 2012-06-15T01:07:11.403 回答
1

在您的样式中,当您将内部 Text 属性绑定到 Template Text 属性时,添加更新源触发器PropertyChanged,然后即使您没有失去焦点,您也会获得文本更新。

Text="{Binding Path=Text, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

设置文本框样式的方法不太有效的原因是,默认情况下,文本属性在从控件中移除焦点之前不会更新其绑定属性。我猜您正在尝试在 TextChanged 事件中使用 Text 属性,此时尚未从 TextBox 中移除焦点。

我向您的 Text 绑定建议的添加将强制属性在每次文本更改时更新,并且会在引发 TextChanged 事件之前执行此操作。

于 2012-06-15T09:19:13.710 回答