我搜寻了一下,但没有找到解决方案。
只有在组合框提示属性中不设置提示工具提示时,才能显示验证工具提示。如果存在验证错误工具提示,则希望看到它,否则显示来自组合框属性的工具提示。当我从组合框属性面板中删除提示文本(即从组合框属性面板中删除)时,验证工具提示可以正常显示。
Application.Resources(App.XAML)中用于显示验证错误提示的XAML代码为
<Style x:Key="StandardComboBoxStyle" TargetType="{x:Type ComboBox}">
<Style.Triggers>
<Trigger Property="Validation.HasError" Value="True">
<Setter Property="ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors)[0].ErrorContent}"/>
</Trigger>
</Style.Triggers>
</Style>
我在Combobox中也使用验证模板,代码如下。这段代码位于用户控件cs文件的UserControl.Resources部分。
<ControlTemplate x:Key="comboBoxValidationTemplate">
<DockPanel Name="myDockPanel">
<Border BorderBrush="Red" BorderThickness="3">
<AdornedElementPlaceholder Name="MyAdorner" />
</Border>
<TextBlock Text="*" FontWeight="Bold" FontSize="18" Foreground="Red" DockPanel.Dock="Left" />
</DockPanel>
</ControlTemplate>
控件本身的定义如下所示。请注意,还有其他未在此处定义的参考资料(但希望不相关 - 如果有问题,请随时告诉我)。
<ComboBox x:Name="ExposureTime" SelectedValuePath="Content"
Text="{Binding ExposureTime, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, ValidatesOnExceptions=True}" IsEditable="True" Validation.ErrorTemplate="{StaticResource comboBoxValidationTemplate}"
HorizontalContentAlignment="Right" FontSize="18" Margin="136,47,462,0" Height="27" VerticalAlignment="Top" GotFocus="ComboBox_GotFocus_1" LostFocus="ComboBox_LostFocus_1" PreviewTextInput="ExposureTime_PreviewTextInput" Opacity="{Binding BackgroundOpacity, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" FontWeight="Thin" Style="{DynamicResource StandardComboBoxStyle}" SelectedValue="{Binding Mode=OneWay, ValidatesOnDataErrors=True, ValidatesOnExceptions=True}" IsTextSearchEnabled="False" ToolTip="My tooltip test.">
<ComboBoxItem Content="0.05"/>
<ComboBoxItem Content="0.1"/>
<ComboBoxItem Content="0.2" />
<ComboBoxItem Content="1" />
<ComboBoxItem Content="2" />
<ComboBoxItem Content="5" />
<ComboBoxItem Content="10" />
<ComboBoxItem Content="20" />
<ComboBoxItem Content="60" />
<ComboBox.IsEnabled >
<MultiBinding Converter="{StaticResource multiBooleanConverter}">
<Binding Path="NotPerformingExposure" UpdateSourceTrigger="PropertyChanged"/>Th
<Binding Path="NotPerformingFocusTest" UpdateSourceTrigger="PropertyChanged"/>
</MultiBinding>
</ComboBox.IsEnabled>
</ComboBox>
感谢您!Buck