Nsryjdtyk

I have a View that contains a lot of input parameters. Each parameter consists of a label (name of the parameter) a textbox for its value and another label for its units (eg. kNm).

The Control displays in a horizontal Stackpanel.

When changing the Text (ToWay Binding) of the Textbox the underlying Property (eg. DesignLife) does not update anymore, since I switched from straight WPF (OnPropertyChanged) to MVVM Light (RaisePropertyChanged).

Here are some relevant pieces of code:

using System.Windows;

using System.Windows.Controls;

using System.Windows.Media;



namespace xxxx.Views.CustomControls

{   

    public class InputParameter : ContentControl

    {

        static InputParameter()

        {

            DefaultStyleKeyProperty.OverrideMetadata(typeof(InputParameter), new FrameworkPropertyMetadata(typeof(InputParameter)));

        }



        public override void OnApplyTemplate()

        {

            base.OnApplyTemplate();

        }      

 // some properties left out

        public static readonly DependencyProperty TextProperty =

         DependencyProperty.Register("Text", typeof(string), typeof(InputParameter));

        public string Text

        {

            get => (string)GetValue(TextProperty);

            set => SetValue(TextProperty, value);

        }



    }

}



<UserControl

    x:Class="xxxx.Views.MainUserControls.Column"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:cc="clr-namespace:xxxx.Views.CustomControls"

    xmlns:cf="clr-namespace:xxxx.Model.Config"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    xmlns:tt="clr-namespace:xxxx.Properties"

    DataContext="{Binding Main.Calc, Source={StaticResource Locator}}"

    mc:Ignorable="d">

    <GroupBox Margin="3">



        <StackPanel Orientation="Vertical">



<!-- Stuff left out -->



            <cc:InputParameter

                NameContent="Design life"

                Text="{Binding DesignLife, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, StringFormat=N0}"                  

                UnitContent="years" />

<!-- Stuff left out -->



        </StackPanel>

    </GroupBox>

</UserControl>



<ResourceDictionary

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:cc="clr-namespace:CoCa.Views.CustomControls"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d">

    <Style x:Key="InputParm" TargetType="{x:Type cc:InputParameter}">

        <Setter Property="Template">

            <Setter.Value>

                <ControlTemplate TargetType="{x:Type cc:InputParameter}">

                    <StackPanel Style="{StaticResource SPanel}">



                        <Label

                            x:Name="PART_NameLabel"

                            Width="130"

                            HorizontalContentAlignment="Left"

                            Content="{TemplateBinding NameContent}"

                            Foreground="{TemplateBinding Foreground}"

                            Style="{StaticResource LabelStyle1}"

                            ToolTip="{TemplateBinding ToolTip}" />

                        <TextBox

                            x:Name="PART_TextBox"

                            Width="70"

                            Background="{TemplateBinding TbBackground}"

                            Foreground="{TemplateBinding Foreground}"

                            Style="{StaticResource Tb}"

                            Text="{TemplateBinding Property=Text}" />

                        <Label

                            x:Name="PART_UnitLabel"

                            Content="{TemplateBinding UnitContent}"

                            Foreground="{Binding ElementName=PART_NameLabel, Path=Foreground}"

                            Style="{StaticResource Unit}" />



                    </StackPanel>

                </ControlTemplate>

            </Setter.Value>

        </Setter>

    </Style>

</ResourceDictionary>



private int _designLife;    

public int DesignLife

{

    get => _designLife;



    set

    {

        Set<int>(() => DesignLife, ref _designLife, value, true);

    }

}

I suspect that RaisePropertyChanged does not get called because it is not used anywhere in the class InputParameter's Text DependencyProperty. (Maybe under the hood it does?)

Questions:

1: Is the way I made InputParameter the way to go?

2: Is my suspicion correct?

3 a: If so, How do I get RaisePropertyChanged called?

b: If not: what could be the problem?