Trouble desabling a button when using Validation rules

Question

Dear all,

I have the following control template triger in a style I have for my buttons:

<ControlTemplate.Triggers>
                                <Trigger Property="IsPressed"
							Value="True">
                                    <Trigger.EnterActions>
                                        <BeginStoryboard Storyboard="{StaticResource Press}" />
                                    </Trigger.EnterActions>
                                    <Trigger.ExitActions>
                                        <BeginStoryboard Storyboard="{StaticResource Release}" />
                                    </Trigger.ExitActions>
                                    <Setter Property="Foreground"
								Value="{DynamicResource {x:Static s:SurfaceColors.ButtonForegroundPressedBrushKey}}"/>
                                </Trigger>
                                <Trigger Property="IsEnabled" Value="False">
                                    <Setter Property="Fill" Value="{DynamicResource {x:Static s:SurfaceColors.ButtonBackgroundDisabledBrushKey}}" TargetName="ButtonBody" />
                                    <Setter Property="Foreground" Value="{DynamicResource {x:Static s:SurfaceColors.ButtonForegroundDisabledBrushKey}}"/>
                                    <Setter Property="Opacity" Value="0.33"	TargetName="Content" />
                                    </Trigger>
                                <!--<Trigger Property="IsEnabled" Value="false" />-->
                                <MultiDataTrigger>
                                    <MultiDataTrigger.Conditions>
                                        <Condition Binding="{Binding ElementName=_Nom, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_Prenom, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_company, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_role, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_adresse1, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_City, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_Zip, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_mail, Path=(Validation.HasError)}" Value="false" />
                                        <Condition Binding="{Binding ElementName=_tel, Path=(Validation.HasError)}" Value="false" />
                                    </MultiDataTrigger.Conditions>
                                    <Setter Property="IsEnabled" Value="true" />
                                </MultiDataTrigger>
                            </ControlTemplate.Triggers>

Then for each of my form field I have setup validation rules as follow :

 <TextBox x:Name="_mail"  Style="{StaticResource DefaultTextBox}" Grid.Column="1" Grid.Row="5" Margin="10,5,10,5" BorderBrush="LightBlue" BorderThickness="2"
                                  Validation.ErrorTemplate="{StaticResource validationTemplate}">
                    <TextBox.Text>
                        <Binding Path="CurrentLead.Email" UpdateSourceTrigger="LostFocus" >
                            <Binding.ValidationRules>
                                <validators:IsEmptyStringValidationRules ValidatesOnTargetUpdated="True"/>
                                <validators:IsEmailValidationRules ValidatesOnTargetUpdated="True"/>
                                <ExceptionValidationRule />
                            </Binding.ValidationRules>
                        </Binding>
                    <TextBox.Text>
                <TextBox>

Whatever the status of my validation the Button isEnable prperty is not affected.

Do you see anything wrong in what I have done which culd prevent ?

regards

serge

---

Your knowledge is enhanced by that of others.

Answer 1

Hi Serge,

I suggest you use DataTrigger, instead of MultiDataTrigger, refer to below code snippet:

<ControlTemplate x:Key="buttonTemplate" TargetType="{x:Type Button}">
    <Grid>
        <Ellipse Name="ButtonBody" Fill="Orange" Width="100" Height="100">
        </Ellipse>
    </Grid>
    <ControlTemplate.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Fill" Value="Red" TargetName="ButtonBody" />
        </Trigger>
        <DataTrigger Binding="{Binding ElementName=_Nom,Path=(Validation.HasError)}" Value="True">
            <Setter Property="IsEnabled" Value="False" />
        </DataTrigger>
        <DataTrigger Binding="{Binding ElementName=_Mail,Path=(Validation.HasError)}" Value="True">
            <Setter Property="IsEnabled" Value="False" />
        </DataTrigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

Best regards,

---

Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 2

Does it means that MultiDataTriger is not working well ?

regards

---

Your knowledge is enhanced by that of others.

Answer 3

Yes, I think multiDataTrigger does work on this case.

---

Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.