Validation.HasError attached property
- by Nima
Did I miss something?
1- Style
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=Validation.HasError}" Value="true">
<Setter Property="BorderBrush" Value="Blue" />
</DataTrigger>
</Style.Triggers>
<Setter Property="MinWidth" Value="160" />
<Setter Property="Margin" Value="0 7 0 0"/>
</Style>
2 - Viewmodel implement IDataErrorInfo
3- textBox in view
<TextBox x:Name="FirstName" Text="{Binding Person.FirstName, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=true}"></TextBox>
3 - I use Caliburn MVVM
I got " BindingExpression path error: 'Validation' property not found on 'object' ''PersonWindowViewModel' (HashCode=38783181)'. BindingExpression:Path=Validation.HasError; DataItem='PersonWindowViewModel' (HashCode=38783181); target element is 'TextBox' (Name='FirstName'); target property is 'NoTarget' (type 'Object')"S
