Argthtjtr

I am trying to generalize the sample provided by Microsoft illustrating how to implement a Binding Validation [https://docs.microsoft.com/en-us/dotnet/framework/wpf/data/how-to-implement-binding-validation#see-also] by reformulating it all in C#.

(1) I am trying to convert the following XAML binding to C#:

<TextBox Name="textBox1" Width="50" FontSize="15"

         Validation.ErrorTemplate="{StaticResource validationTemplate}"

         Style="{StaticResource textBoxInError}"

         Grid.Row="1" Grid.Column="1" Margin="2">

  <TextBox.Text>

    <Binding Path="Age" Source="{StaticResource ods}"

             UpdateSourceTrigger="PropertyChanged" >

      <Binding.ValidationRules>

        <c:AgeRangeRule Min="21" Max="130"/>

      </Binding.ValidationRules>

    </Binding>

  </TextBox.Text>

</TextBox>

(2) and the following XAML which creates a red exclamation mark to notify the user of a validation error to C#:

    <ControlTemplate x:Key="validationTemplate">

      <DockPanel>

        <TextBlock Foreground="Red" FontSize="20">!</TextBlock>

        <AdornedElementPlaceholder/>

      </DockPanel>

    </ControlTemplate>

(3) also the XAML which creates a ToolTip to C# that shows the error message is created:

<Style x:Key="textBoxInError" TargetType="{x:Type TextBox}">

  <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>

</Style>

My goal is to make it reusable in many places by defining a class which can construct/define both the text field and the binding in my program to connect text fields to integer or double type properties. Although similar question was asked before [WPF C# how to create THIS binding in code? in this case XAML code for defining the binding and the helper utilities/methods are fairly complex.

Any comment, suggestion, or help would be appreciated.

i.konuk