如何读取silverlight中定义的内部样式控件的属性。？

Question

我在 Silver-light 应用程序中使用 NumericUpDown 控件。代码如下

 <StackPanel Style="{StaticResource StackPanelStyle_LableValue}">
                        <TextBlock Text="{Binding Path=ViewItem.Strength, Source={StaticResource LocalizedStrings }}" Style="{StaticResource TextBlockStyle}" />
                        <inputToolkit:NumericUpDown Style="{StaticResource NumericUpdownStyle_Strength}"
                                                    Value="{Binding RightSpecGlassStrength, Mode=TwoWay, ValidatesOnNotifyDataErrors=True, NotifyOnValidationError=True}" 
                                                    TabIndex="5" />
                    </StackPanel>

我绑定到 NumericUpDown 控件的样式如下

 <Style x:Key="NumericUpdownStyle_Strength" TargetType="inputToolkit:NumericUpDown">
    <Setter Property="Width" Value="Auto"></Setter>
    <Setter Property="MinWidth" Value="50"></Setter>
    <Setter Property="Height" Value="20"></Setter>
    <Setter Property="Minimum" Value="-28"></Setter>
    <Setter Property="Maximum" Value="28"></Setter>            
    <Setter Property="BorderThickness" Value="0"></Setter>
    <Setter Property="BorderBrush" Value="White"></Setter>
    <Setter Property="DecimalPlaces" Value="2"></Setter>
    <Setter Property="Increment" Value="0.25"></Setter>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="inputToolkit:NumericUpDown">
                <Grid>
                    <VisualStateManager.VisualStateGroups>


                        <VisualStateGroup x:Name="CommonStates">
                            <VisualStateGroup.Transitions>
                                <VisualTransition GeneratedDuration="0"/>
                            </VisualStateGroup.Transitions>
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" Storyboard.TargetName="DisabledVisualElement" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Opacity">
                                        <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
                                    </DoubleAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unfocused"/>
                        </VisualStateGroup>

                        <VisualStateGroup x:Name="ValidationStates">
                            <VisualState x:Name="Valid"/>
                            <VisualState x:Name="InvalidUnfocused">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ValidationErrorElement" Storyboard.TargetProperty="Visibility">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <Visibility>Visible</Visibility>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="InvalidFocused">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ValidationErrorElement" Storyboard.TargetProperty="Visibility">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <Visibility>Visible</Visibility>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="validationTooltip" Storyboard.TargetProperty="IsOpen">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <sys:Boolean>True</sys:Boolean>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>

                    </VisualStateManager.VisualStateGroups>
                    <inputToolkit:ButtonSpinner x:Name="Spinner" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" MinWidth="35">
                        <StackPanel Background="White" Orientation="Horizontal" HorizontalAlignment="Right" Width="Auto">                                   
                            <TextBox x:Name="Text"  Style="{StaticResource TextBoxStyle}" TabIndex="0"
                                 BorderThickness="0" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" FontStretch="{TemplateBinding FontStretch}" FontStyle="{TemplateBinding FontStyle}" FontWeight="{TemplateBinding FontWeight}" Foreground="{TemplateBinding Foreground}" MinWidth="50" Width="Auto"  AcceptsReturn="False" Text="{TemplateBinding Value}" TextAlignment="Left" TextWrapping="NoWrap"/>
                        </StackPanel>
                    </inputToolkit:ButtonSpinner>
                    <Border x:Name="DisabledVisualElement" IsHitTestVisible="false" Opacity="0" Background="#A5FFFFFF" CornerRadius="2.5,2.5,2.5,2.5"/>
                    <Border x:Name="FocusVisualElement" IsHitTestVisible="False" Opacity="0" BorderBrush="#FF45D6FA" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="1,1,1,1"/>
                    <Border x:Name="ValidationErrorElement" Visibility="Collapsed" BorderBrush="#FFDB000C" BorderThickness="1" CornerRadius="1">
                        <ToolTipService.ToolTip>
                            <ToolTip x:Name="validationTooltip" Height="Auto" Width="Auto" Template="{StaticResource ValidationToolTipTemplate}" DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" PlacementTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}">
                                <ToolTip.Triggers>
                                    <EventTrigger RoutedEvent="Canvas.Loaded">
                                        <BeginStoryboard>
                                            <Storyboard>
                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="validationTooltip" Storyboard.TargetProperty="IsHitTestVisible">
                                                    <DiscreteObjectKeyFrame KeyTime="0">
                                                        <DiscreteObjectKeyFrame.Value>
                                                            <sys:Boolean>true</sys:Boolean>
                                                        </DiscreteObjectKeyFrame.Value>
                                                    </DiscreteObjectKeyFrame>
                                                </ObjectAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </BeginStoryboard>
                                    </EventTrigger>
                                </ToolTip.Triggers>
                            </ToolTip>
                        </ToolTipService.ToolTip>
                        <Grid Height="12" HorizontalAlignment="Right" Margin="1,-4,-4,0" VerticalAlignment="Top" Width="12" Background="Transparent">
                            <Path Fill="#FFDC000C" Margin="1,3,0,0" Data="M 1,0 L6,0 A 2,2 90 0 1 8,2 L8,7 z"/>
                            <Path Fill="#ffffff" Margin="1,3,0,0" Data="M 0,0 L2,0 L 8,6 L8,8"/>
                        </Grid>
                    </Border>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

我在使用上述代码运行应用程序构建时发现了错误。

为了解决这个错误，我想读取在 App.xaml 的 style 中定义的 <inputToolkit:ButtonSpinner > </inputToolkit:ButtonSpinner > "Text" 中定义的输入 TextBox 的值> 用于 NumericUpDown 控件。

如何在 ValueChainging/ValueChanged/GotFocus/LostFocust 或 NumericUpDown 控件的任何其他事件上在运行时从 textBox 读取值。

Answer 1

您可以将事件处理程序添加到您的内部TextBox 模板。我不记得了，你能把它加到模板上吗，但我敢肯定，你可以创建这样的样式

<Style x:Key="MyTextBoxStyle" TargetType="{x:Type TextBox}">
    <EventSetter Event="ValueChainging" Handler="PathName_KeyDown" />
    <EventSetter Event="LostFocust" Handler="GiveFocusToMe" />
    ....
</Style>

然后将其应用于您的文本框，放置 BreakPoints 并查看您需要的所有详细信息

Answer 2

我已将 LostFocus 事件添加到 <inputToolkit:ButtonSpinner > </inputToolkit:ButtonSpinner > 内的文本框中，并且在该事件中我编写了代码来实现我的逻辑。 :)

我的 TextBox 如下所示

 <TextBox x:Name="Text"  Style="{StaticResource TextBoxStyle}" TabIndex="{TemplateBinding TabIndex}"
                                     BorderThickness="0" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" FontStretch="{TemplateBinding FontStretch}" FontStyle="{TemplateBinding FontStyle}" FontWeight="{TemplateBinding FontWeight}" Foreground="{TemplateBinding Foreground}" MinWidth="50" Width="Auto"  AcceptsReturn="False" Text="{TemplateBinding Value}" TextAlignment="Right" TextWrapping="NoWrap" LostFocus="Text_LostFocus"/>

Answer 3

您的inputToolkit:ButtonSpinner 控件在模板中有一个名称，即Spinner

因此，您可以使用它获得如下控件（仅在 Visual Tree 完全形成之后，例如在 Load 事件之后）...

 var mySpinner = myNumericUpDownControl.Template.FindName("Spinner", myNumericUpDownControl)

您的 myNumericUpDownControl 可以在 XAML 中直接命名为 myNumericUpDownControl，或者您可以附加行为以从中提取微调器控件。无论您做出何种决定，请确保在 VisualTree 完全形成后执行此操作，否则 FindName 将失败。

如果这有帮助，请告诉我。