Проблема при использовании fluentvalidation для проверки сетки данных

Question

Я новичок ie в WPF, и я изо всех сил пытаюсь проверить DataGrid с помощью FluentValidation, что я пытаюсь проверить каждую строку в Datagrid, проблема в том, что некоторые строки, хотя они действительны, это показывает, что они не действительны

вот скриншот странного поведения DataGrid

снимок экрана

вот код, который я использую

• класс

  public class DetailFacture : INotifyPropertyChanged, IDataErrorInfo , IEditableObject
  {
  private DetailFactureValidator _detailFactureValidator;
  
  private string _libellePiece;
  private decimal _montantHT;
  private decimal _tauxTVA;
  private string _compteCharge;
  private string _compteTva;
  private string _codeTva;
  
  public DetailFacture ( )
  {
      _detailFactureValidator = new DetailFactureValidator( );
  }
  
  public string LibellePiece
  {
      get { return _libellePiece; }
      set
      {
          _libellePiece = value;
          OnPropertyChanged( "LibellePiece" );
      }
  }
  
  public decimal MontantHT
  {
      get { return _montantHT; }
      set
      {
          _montantHT = value;
          OnPropertyChanged( "MontantHT" );
      }
  }
  
  public decimal TauxTVA
  {
      get { return _tauxTVA; }
      set
      {
          _tauxTVA = value;
          OnPropertyChanged( "TauxTVA" );
      }
  }
  
  public string CompteCharge
  {
      get { return _compteCharge; }
      set
      {
          _compteCharge = value;
          OnPropertyChanged( "CompteCharge" );
      }
  }
  
  public string CompteTva
  {
      get { return _compteTva; }
      set
      {
          _compteTva = value;
          OnPropertyChanged( "CompteTva" );
      }
  }
  
  public string CodeTva
  {
      get { return _codeTva; }
      set
      {
          _codeTva = value;
          OnPropertyChanged( "CodeTva" );
      }
  }
  
  public string Error
  {
      get
      {
          if ( _detailFactureValidator != null )
          {
              var results = _detailFactureValidator.Validate( this );
              if ( results != null && results.Errors.Any( ) )
              {
                  var errors = string.Join( Environment.NewLine , results.Errors.Select( x => x.ErrorMessage ).ToArray( ) );
                  return errors;
              }
          }
          return string.Empty;
      }
  }
  
  public string this[ string columnName ]
  {
      get
      {
          var firstOrDefault = _detailFactureValidator.Validate( this ).Errors.FirstOrDefault( lol => lol.PropertyName == columnName );
          if ( firstOrDefault != null )
              return _detailFactureValidator != null ? firstOrDefault.ErrorMessage : "";
          return "";
      }
  }
  
  public event PropertyChangedEventHandler PropertyChanged;
  
  protected virtual void OnPropertyChanged ( string propertyName )
  {
      PropertyChanged?.Invoke( this , new PropertyChangedEventArgs( propertyName ) );
  }
  
  private DetailFacture backupCopy;
  private bool inEdit;
  
  public void BeginEdit ( )
  {
      if ( inEdit )
          return;
      inEdit = true;
      backupCopy = this.MemberwiseClone( ) as DetailFacture;
  }
  
  public void CancelEdit ( )
  {
      if ( !inEdit )
          return;
      inEdit = false;
      this.CodeTva = backupCopy.CodeTva;
      this.CompteCharge = backupCopy.CompteCharge;
      this.CompteTva = backupCopy.CompteTva;
      this.LibellePiece = backupCopy.LibellePiece;
      this.MontantHT = backupCopy.MontantHT;
      this.TauxTVA = backupCopy.TauxTVA;
  }
  
  public void EndEdit ( )
  {
      if ( !inEdit )
          return;
      inEdit = false;
      backupCopy = null;
  }
  }
  

• Validator

  public class DetailFactureValidator : AbstractValidator<DetailFacture>
  {
  public DetailFactureValidator ( )
  {
      RuleFor( det => det.CodeTva ).NotNull( ).WithMessage( "CodeTva ne doit pas être vide" )
          .ExclusiveBetween("32" , "44").WithMessage("Code Tva doit etre entre 32 et 44")
          .Matches( @"\w*" ).WithMessage( "CodeTva n'est pas une chaîne de caractères" );
  
      RuleFor( det => det.CompteCharge ).NotNull( ).WithMessage( "CompteCharge ne doit pas être      vide" )
          .Matches( @"\w*" ).WithMessage( "CompteCharge n'est pas une chaîne de caractères" );
  
      RuleFor( det => det.CompteTva ).NotNull( ).WithMessage( "CompteTva ne doit pas être vide" )
          .Matches( @"\w*" ).WithMessage( "CompteTva n'est pas une chaîne de caractères" );
  
      RuleFor( det => det.LibellePiece ).NotNull( ).WithMessage( "LibellePiece ne doit pas être vide" )
          .Matches( @"\w*" ).WithMessage( "LibellePiece n'est pas une chaîne de caractères" );
  
  }
  }
  

• Xaml

<UserControl.Resources>
       <Style x:Key="errorStyle" TargetType="{x:Type TextBox}">
           <Setter Property="Padding" Value="-2"/>
           <Style.Triggers>
               <Trigger Property="Validation.HasError" Value="True">
                   <Setter Property="Background" Value="Red"/>
                   <Setter Property="ToolTip" 
         Value="{Binding RelativeSource={RelativeSource Self},
           Path=(Validation.Errors)[0].ErrorContent}"/>
               </Trigger>
           </Style.Triggers>
       </Style>
       <Style TargetType="DataGridCell">
           <Setter Property="Margin" Value="0"/>
           <Setter Property="Padding" Value="0"/>
           <Setter Property="BorderThickness" Value="0"/>
           <EventSetter Event="PreviewMouseLeftButtonDown" Handler="DataGridCell_PreviewMouseLeftButtonDown" />
       </Style>
       <Style TargetType="{x:Type DataGridRow}">
           <Setter Property="ValidationErrorTemplate">
               <Setter.Value>
                   <ControlTemplate>
                       <Image Source="/Images/Alerte.png" ToolTip="{Binding RelativeSource={ RelativeSource FindAncestor, AncestorType={x:Type DataGridRow}}, Path=(Validation.Errors)[0].ErrorContent}" Margin="0" Width="11" Height="11" />
                   </ControlTemplate>
               </Setter.Value>
           </Setter>
       </Style>
   </UserControl.Resources>
<DataGrid x:Name="grille" Grid.ColumnSpan="2" CanUserAddRows="True" ItemsSource="{Binding FactureDetailList, Mode=TwoWay ,ValidatesOnDataErrors=True,ValidatesOnNotifyDataErrors=True,UpdateSourceTrigger=PropertyChanged}" AutoGenerateColumns="False" Background="#FF06C257" BorderBrush="#FF02401D" Foreground="#FF929292" BorderThickness="0" CanUserResizeColumns="False" >
                           <DataGrid.Columns>
                               <DataGridTextColumn Header="Libelle Piece" EditingElementStyle="{StaticResource errorStyle}" Binding="{Binding LibellePiece, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />
                               <DataGridTextColumn Header="Montant HT" EditingElementStyle="{StaticResource errorStyle}" Binding="{Binding MontantHT, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />
                               <DataGridTextColumn Header="Taux TVA" EditingElementStyle="{StaticResource errorStyle}" Binding="{Binding TauxTVA, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />

                               <DataGridTextColumn Header="Compte Charge" EditingElementStyle="{StaticResource errorStyle}" Binding="{Binding CompteCharge, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />
                               <DataGridTextColumn Header="Compte Tva" EditingElementStyle="{StaticResource errorStyle}" Binding="{Binding CompteTva, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />
                               <DataGridTextColumn Header="Code Tva" EditingElementStyle="{StaticResource errorStyle}" Binding="{Binding CodeTva, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />
                           </DataGrid.Columns>
                       </DataGrid>

• Xaml.cs

 public partial class FormulaireUC : UserControl
    {
        private ObservableCollection<DetailFacture> FactureDetailList;
        public FormulaireUC ( )
        {
            InitializeComponent( );

            grille.ItemsSource = FactureDetailList;
        }
}