我该怎么做才能使“ContentControl”与“IDataErrorInfo”一起工作,并在选中或取消选中复选框时检查其有效性?
一些代码:
绑定:
<ContentControl Content="{Binding GeneralInvoiceTypes, ValidatesOnDataErrors=True}"
Margin="0,0,5,0" />
数据模板:
<DataTemplate DataType="{x:Type ViewModels:MultipleOptionsViewModel}">
<GroupBox Header="{Binding Title}">
<ItemsControl ItemsSource="{Binding Options}" />
</GroupBox>
</DataTemplate>
<DataTemplate DataType="{x:Type ViewModels:OptionViewModel}">
<CheckBox IsChecked="{Binding IsChecked}"
Content="{Binding Name}"
Margin="6,3,3,0" />
</DataTemplate>
样式:
<Style TargetType="{x:Type ContentControl}">
<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>
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="90*" />
<ColumnDefinition Width="20" />
</Grid.ColumnDefinitions>
<Border BorderBrush="Red"
BorderThickness="1"
CornerRadius="2.75"
Grid.Column="0">
<AdornedElementPlaceholder Grid.Column="0" />
</Border>
<TextBlock Foreground="Red"
Grid.Column="1"
Margin="0"
FontSize="12"
VerticalAlignment="Center"
HorizontalAlignment="Left"
x:Name="txtError">
*
</TextBlock>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>