sdk/samples/WPFSamples/BusinessLayerValidation/csharp/window1.xaml

   1 <Window x:Class="BusinessLayerValidation.Window1"
   2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   4         Title="WPF IDataErrorInfo Sample" Width="350" Height="150"
   5         xmlns:src="clr-namespace:BusinessLayerValidation">
   6
   7   <Window.Resources>
   8     <src:Person x:Key="data"/>
   9
  10     <!--The tool tip for the TextBox to display the validation error message.-->
  11     <Style x:Key="textBoxInError" TargetType="TextBox">
  12       <Style.Triggers>
  13         <Trigger Property="Validation.HasError" Value="true">
  14           <Setter Property="ToolTip"
  15                             Value="{Binding RelativeSource={x:Static RelativeSource.Self},
  16                         Path=(Validation.Errors)[0].ErrorContent}"/>
  17         </Trigger>
  18       </Style.Triggers>
  19     </Style>
  20   </Window.Resources>
  21
  22   <StackPanel Margin="20">
  23     <TextBlock FontSize="16">
  24
  25     </TextBlock>
  26     <TextBlock>Enter your age:</TextBlock>
  27     <TextBox Style="{StaticResource textBoxInError}">
  28       <TextBox.Text>
  29         <Binding Path="Age" Source="{StaticResource data}"
  30                  UpdateSourceTrigger="PropertyChanged">
  31           <Binding.ValidationRules>
  32             <!--DataErrorValidationRule checks for validation
  33                 errors raised by the IDataErrorInfo object
  34                 Alternatively, you can set ValidatesOnDataErrors="True"
  35                 on the Binding.-->
  36             <DataErrorValidationRule/>
  37           </Binding.ValidationRules>
  38         </Binding>
  39       </TextBox.Text>
  40     </TextBox>
  41     <TextBlock>Mouse-over to see the validation error message.</TextBlock>
  42   </StackPanel>
  43 </Window>