Tukukkk

I want lost focus event to be implemented for a column in a datagrid in wpf. I have used CellEditEnding event but this is getting raised on the start of editing not at the end. Please someone help me.

i have used that event and it's working perfect.
my xaml Code Look like

<DataGrid AutoGenerateColumns="False" Height="256" HorizontalAlignment="Left" Name="dgEmp" VerticalAlignment="Top" Width="490"  ItemsSource="{Binding DeleteDate,Mode=TwoWay}" Margin="6,7,0,0" CanUserDeleteRows="True" RowEditEnding="dgEmp_RowEditEnding"  CellEditEnding="dgEmp_CellEditEnding" Grid.RowSpan="3">

                    <DataGrid.Columns>

                        <DataGridTextColumn Header="ID" Binding="{Binding ID,Mode=TwoWay}" IsReadOnly="True" Visibility="Hidden"/>

                        <DataGridTextColumn Header="Description" Binding="{Binding Description,Mode=TwoWay}" IsReadOnly="True"/>

                        <DataGridTextColumn Header="Amount" Binding="{Binding Amount,Mode=TwoWay}" IsReadOnly="True"/>

                        <DataGridTextColumn Header="Date" Binding="{Binding Date,Mode=TwoWay}" IsReadOnly="True"/>

                        <DataGridTextColumn Header="Remark" Binding="{Binding Remark,Mode=TwoWay}" IsReadOnly="True"/>

                        <DataGridTemplateColumn>

                            <DataGridTemplateColumn.CellTemplate>

                                <DataTemplate>

                                    <Button Content="Update" x:Name="btnUpdate"

                            Click="btnUpdate_Click"></Button>

                                </DataTemplate>

                            </DataGridTemplateColumn.CellTemplate>

                        </DataGridTemplateColumn>

                        <DataGridTemplateColumn>

                            <DataGridTemplateColumn.CellTemplate>

                                <DataTemplate>

                                    <Button Content="Delete" x:Name="btnDelete"

                            Click="btnDelete_Click"></Button>

                                </DataTemplate>

                            </DataGridTemplateColumn.CellTemplate>

                        </DataGridTemplateColumn>

                    </DataGrid.Columns>

                </DataGrid>

in my .cs file Code look like

   private void dgEmp_RowEditEnding(object sender, DataGridRowEditEndingEventArgs e)

        {

        var update = from p in Context.Expense_Submits where p.ID == objEmpToEdit.ID select p;

        foreach (var item in update)

            {

            item.ID = objEmpToEdit.ID;

            item.Description = objEmpToEdit.Description;

            item.Date = objEmpToEdit.Date;

            item.Amount = objEmpToEdit.Amount;

            item.Remark = objEmpToEdit.Remark;

            }

        Context.SubmitChanges();

        MessageBox.Show("The Current row updation is complete..");

        }





  private void dgEmp_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)

        {



        if (isUpdateMode) //The Row is edited

            {

            Expense_Submit exp_sub = (from exp in submit where exp.ID == objEmpToEdit.ID select exp).FirstOrDefault();

            FrameworkElement element_1 = dgEmp.Columns[1].GetCellContent(e.Row);

            if (element_1.GetType() == typeof(TextBox))

                {

                var Description = ((TextBox)element_1).Text;

                objEmpToEdit.Description = Description.ToString();



                }



            FrameworkElement element_2 = dgEmp.Columns[2].GetCellContent(e.Row);

            if (element_2.GetType() == typeof(TextBox))

                {

                var Amount = ((TextBox)element_2).Text;

                objEmpToEdit.Amount = Amount.ToString();

                }



            FrameworkElement element_3 = dgEmp.Columns[3].GetCellContent(e.Row);

            if (element_3.GetType() == typeof(TextBox))

                {

                var Date = ((TextBox)element_3).Text;

                objEmpToEdit.Date = Convert.ToDateTime(Date);

                }



            FrameworkElement element_4 = dgEmp.Columns[4].GetCellContent(e.Row);

            if (element_4.GetType() == typeof(TextBox))

                {

                var Remark = ((TextBox)element_4).Text;

                objEmpToEdit.Remark = Remark.ToString();

                }





            }





        }

 private void dgEmp_SelectionChanged(object sender, SelectionChangedEventArgs e)

        {

        objEmpToEdit = dgEmp.SelectedItem as Expense_Submit;

        }

Why not use LostFocus event on cells, then check if the cell belongs to the column you want.

For example:

<DataGrid.CellStyle>

   <Style TargetType="{x:Type DataGridCell}">

      <EventSetter Event="LostFocus" Handler="OnCellLostFocus"/>

   </Style>

</DataGrid.CellStyle>

Then in the handler:

private void OnCellLostFocus(object sender, RoutedEventArgs e)

    {

        if (((DataGridCell)sender).Column.Header == "My Column")

            //do stuff

    }

The solution provided by Esam works needs a little edit:

XAML remains the same:

  <DataGrid.CellStyle>

   <Style TargetType="{x:Type DataGridCell}">

      <EventSetter Event="LostFocus" Handler="OnCellLostFocus"/>

   </Style>

</DataGrid.CellStyle>

Code behind to be adapted:

private void OnCellLostFocus(object sender, RoutedEventArgs e)

    {

        var myCell = sender as DataGridCell;

        if (myCell.Column.Header.ToString() == "Name of the column")

        {

            MessageBox.Show("tralala. I got it");

            //do whatever needed here

        }

    }