Xaml（WPF）中ViewModel的Validation.ErorrTemplate动态更改

Question

Is there a way to change the Validation.ErrorTemplate from viewModel ,based on property Error Type in mvvm style with IDataErrorInfo.

Eg. I have a property with two different validation templates , in one i display in a way and the another in another way based on the property if required show a choosed template, if exceeds choosed the second one.

Thanks in advance Ben

Answer 1

use this in your resource

<ControlTemplate x:Key="ct1">
    <!--Your First Template-->
</ControlTemplate>
<ControlTemplate x:Key="ct2">
    <!--Your Second Template-->
</ControlTemplate>

<Style TargetType="TextBox">
    <Style.Triggers>
        <DataTrigger Binding="{Binding YourProperty}" Value="yourValue1">
            <Setter Property="Validation.ErrorTemplate" Value="{StaticResource ct1}"></Setter>
        </DataTrigger>
        <DataTrigger Binding="{Binding YourProperty}" Value="yourValue2">
            <Setter Property="Validation.ErrorTemplate" Value="{StaticResource ct2}"></Setter>
        </DataTrigger>
    </Style.Triggers>
</Style>