文本框只能点击“第一行”

Question

我有一个文本框，它高于“普通”文本框。如果我单击文本框的“第一行”，我只能输入文本。我怎样才能使单击文本框的任何部分并能够显示光标成为可能，因为如果您有一个 5 行文本框并且必须单击第一行才能输入一些文本，这会很烦人

<StackPanel Orientation="Vertical" Margin="0,0,15,0">
      <TextBlock x:Name="lblObjective" Text="Objective" Style="{StaticResource TextBlockStyle}" VerticalAlignment="Center"></TextBlock>
      <TextBox x:Name="Objective"  Text="{Binding ObjectiveText, Mode=TwoWay}" TextWrapping="Wrap" Height="120" Width="500"></TextBox>
</StackPanel>

编辑：

这是影响我的应用程序中所有文本框的模板。谁能说出我需要添加什么才能单击文本框上的任何位置并仍然获得插入符号，而不必单击第一行

<Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="TextBox">
                <Grid x:Name="RootElement">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="MouseOver">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="FocusRectangle" />
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="DisabledVisualElement">
                                        <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
                                    </DoubleAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="ReadOnly">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="ReadOnlyVisualElement">
                                        <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
                                    </DoubleAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="FocusRectangle" />
                                    <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="FocusInnerRectangle"/>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unfocused">
                                <Storyboard/>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="ValidationStates">
                            <VisualState x:Name="Valid"/>
                            <VisualState x:Name="InvalidUnfocused">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ValidationErrorElement">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <Visibility>Visible</Visibility>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="InvalidFocused">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ValidationErrorElement">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <Visibility>Visible</Visibility>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsOpen" Storyboard.TargetName="validationTooltip">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <sys:Boolean>True</sys:Boolean>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Rectangle x:Name="Base" Stroke="{TemplateBinding BorderBrush}" StrokeThickness="{TemplateBinding BorderThickness}" Opacity="1" Fill="{StaticResource ControlBackgroundBrush}" />
                    <Rectangle x:Name="FocusRectangle" StrokeThickness="{TemplateBinding BorderThickness}" Opacity="0" Stroke="{StaticResource TextBoxMouseOverBorderBrush}" />
                    <Rectangle x:Name="FocusInnerRectangle" StrokeThickness="{TemplateBinding BorderThickness}" Opacity="0" Margin="1" Stroke="{StaticResource TextBoxMouseOverInnerBorderBrush}" />
                    <Grid Margin="0,1,0,0">
                        <Border x:Name="ReadOnlyVisualElement" Background="{StaticResource ReadOnlyBrush}" Opacity="0"/>
                        <Grid >
                            <ScrollViewer x:Name="ContentElement" BorderThickness="0" IsTabStop="False" Margin="4,0,2,2" VerticalAlignment="Top" Background="{x:Null}"/>
                        </Grid>
                    </Grid>
                    <Rectangle x:Name="DisabledVisualElement" Stroke="{StaticResource ControlsDisabledBrush}" StrokeThickness="{TemplateBinding BorderThickness}" Fill="{StaticResource ControlsDisabledBrush}" IsHitTestVisible="False" Opacity="0"/>
                    <Border x:Name="ValidationErrorElement" BorderBrush="{StaticResource ControlsValidationBrush}" BorderThickness="1" Visibility="Collapsed">
                        <ToolTipService.ToolTip>
                            <ToolTip x:Name="validationTooltip" DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" PlacementTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}" Template="{StaticResource ValidationToolTipTemplate}">
                                <ToolTip.Triggers>
                                    <EventTrigger RoutedEvent="Canvas.Loaded">
                                        <BeginStoryboard>
                                            <Storyboard>
                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsHitTestVisible" Storyboard.TargetName="validationTooltip">
                                                    <DiscreteObjectKeyFrame KeyTime="0">
                                                        <DiscreteObjectKeyFrame.Value>
                                                            <sys:Boolean>true</sys:Boolean>
                                                        </DiscreteObjectKeyFrame.Value>
                                                    </DiscreteObjectKeyFrame>
                                                </ObjectAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </BeginStoryboard>
                                    </EventTrigger>
                                </ToolTip.Triggers>
                            </ToolTip>
                        </ToolTipService.ToolTip>
                        <Grid Background="Transparent" HorizontalAlignment="Right" Height="12" Margin="1,-4,-4,0" VerticalAlignment="Top" Width="12">
                            <Path Data="M 1,0 L6,0 A 2,2 90 0 1 8,2 L8,7 z" Fill="{StaticResource ValidationBrush5}" Margin="1,3,0,0"/>
                            <Path Data="M 0,0 L2,0 L 8,6 L8,8" Fill="{StaticResource WhiteColorBrush}" Margin="1,3,0,0"/>
                        </Grid>
                    </Border>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>

如果我删除整个模板，一切正常（即，无论我在哪里点击文本框，我都会得到一个 carret），但其余部分也会丢失。所以我错过了一些想法？

编辑 2：

<ScrollViewer x:Name="ContentElement" BorderThickness="0" IsTabStop="False" Margin="4,0,2,2" VerticalAlignment="Top" Background="{x:Null}"/>

是问题的根源...而不是 VerticalAlignment="Stretch" 它被设置为顶部，因此只有一行是可点击的...

Answer 1

我不确定您看到的是什么，但我发现在这样的文本框中单击文本框中的任何位置都会为其提供输入焦点，因此我可以开始编辑（不管AcceptsReturn 的状态如何，尽管您应该拥有开启）。

但是，如果您在框中单击的位置超出了当前字符串值的末尾，则插入符号将放置在内容的末尾，而不是您单击的位置。这是常见的文本框行为，我正在输入的 stackoverflow 中的文本框具有相同的行为。

如果您希望能够在 TexBox 中的任何位置开始输入，那么您将需要检测 mousedown 的文本位置并注入适当数量的空白。不是小事。