当我使用WPF选中datagrid中的复选框时，如何获取行值？

Question

If user checked 'isACreer' and 'oldLibelle' (in same row) is empty, then I show a message box to inform user that is not authorized. How to do that in WPF ?

Here is my wpf code :

    <Window.Resources>
        <local:_Produits x:Key="_Produits"/>
        <CollectionViewSource x:Key="produitsViewSource" Source="{Binding Produits, Source={StaticResource _Produits}}"/>
    </Window.Resources>
    <DataGrid  x:Name="futureProductsDataGrid" Grid.Row="4" Grid.Column="0" Margin="20" ItemsSource="{Binding}" AutoGenerateColumns="False" >
        <DataGrid.Columns>
            <DataGridTextColumn Header="Code produit vinif"  Binding="{Binding codeVinif}" Width="105" IsReadOnly="true"/>
            <DataGridTextColumn Header="Libellé Actuel" Binding="{Binding oldLibelle}" Width="SizeToCells" IsReadOnly="true"/>
            <DataGridTextColumn Header="Libellé Futur"   Binding="{Binding newLibelle, Mode=TwoWay}" Width="SizeToCells"/>
            <DataGridCheckBoxColumn Header="A créer ?" Binding="{Binding isACreer, Mode=TwoWay}" Width="80" >
                <DataGridCheckBoxColumn.CellStyle>
                    <Style>
                        <EventSetter Event="CheckBox.Checked" Handler="OnChecked"/>
                    </Style>
                </DataGridCheckBoxColumn.CellStyle>
            </DataGridCheckBoxColumn>
        </DataGrid.Columns>
    </DataGrid>

Here is my C# code :

    private void GetProduits()
    {
        try
        {
            _produits = new _Produits();
            _produitsProduitsTableAdapter = new ProduitsTableAdapter();
            _produitsProduitsTableAdapter.Connection = new OleDbConnection(_connectionString);
            _produitsProduitsTableAdapter.Fill(_produits.Produits);
        }
        catch (Exception ex)
        {
            _loggerComavi.Error("Erreur lors du chargement de la table Produits");
            _loggerComavi.Error(ex.Source);
            _loggerComavi.Error(ex.Message);
            _loggerComavi.Error(ex.StackTrace);
        }
    }


    private void OnChecked(object sender, RoutedEventArgs e)
    {
        _loggerComavi.Info("OnChecked");
       //TODO MessageBox.show()
    }

Here is a screenshot :

Answer 1

Try this:

private void OnChecked(object sender, RoutedEventArgs e)
{
    CheckBox checkBox = (CheckBox)e.OriginalSource;
    DataGridRow dataGridRow = VisualTreeHelpers.FindAncestor<DataGridRow>(checkBox);

    var produit = dataGridRow.DataContext;

    if (checkBox.IsChecked && String.IsNullOrEmpty(produit.oldLibelle)
    {
        // Show message box here...
    }


    e.Handled = true;
}

I do not know how the products look like that are bound to the grid which come from your table adapter. But you should be able to find your oldLibelle property somewhere in the produit object mentioned above.

Please note that this solution uses the custom VisualTreeHelpers class (written by Rachel Lim). It can be found here . I provides the FindAcenstor method used above.

VisualTreeHelpers uses the .NET class VisualTreeHelper internally.

Answer 2

this will popup a message bix and you can take action on OK press.

MessageBoxResult result = MessageBox.Show("Please enter the empty field to proceed?", "Confirmation", MessageBoxButton.OK, MessageBoxImage.Asterisk);
            if (result == MessageBoxResult.OK)
            {

            }

please try. thankyou.

Answer 3

Here is full code:

private void OnChecked(object sender, RoutedEventArgs e)
    {
        CheckBox checkBox = (CheckBox)e.OriginalSource;
        DataGridRow dataGridRow = VisualTreeHelpers.FindAncestor<DataGridRow>(checkBox);
        DataRowView produit = (DataRowView)dataGridRow.Item;

        if (produit[3].Equals(""))
        {
            MessageBox.Show(
                "Vous ne pouvez pas ajouter cette appellation car elle n'était pas créée l'année dernière. Veuillez la créer manuellement.", "Erreur",
                MessageBoxButton.OK, MessageBoxImage.Warning);

        }

        e.Handled = true;
    }