It turns out I needed to do this:
private void grdAirWayBillDetails_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
this.grdAirWayBillDetails.CommitEdit();
Dispatcher.BeginInvoke(new Action(() =>
{
AddDetailRow();
}), DispatcherPriority.Background, null);
}
}So now I just need to work out how to detect when I am on the last row and column in the grid.
>Ah. I 'm guessing that 'AirWayBillDetail' is a MM thing - in which case I don't know what it does so your understanding is better than mine :-}
>
>Doesn't sound from the syntax as if it is actually added to the collection tho :-{
>
>>if I understand it correctly, that's what this line does:
>>
>>
AirWayBillDetailEntity entity = this.AirWayBillDetail.NewEntity(new AirWayBillDetailDefaults(this.AirWayBill.Entity.awb_pk));
>>
>>The rest of it is setting focus to the correct cell in the grid.
>>
>>Or have I misunderstood?
>>
>>
>>>Haven't looked at this properly but would it make more sense (in AddDetailRow()) to just add the created entity to the collection to which the grid is bound ?
>>>
>>>>Anyone have any ideas on this?
>>>>
>>>>>Hi,
>>>>>
>>>>>I have a datagrid with two columns, one a dropdown/combo and the other a textbox for entering a value. Once a value is entered in the last row I want to automatically add another row to the datagrid and place the focus on the combo.
>>>>>
>>>>>This is the xaml for the grid:
>>>>>
>>>>>
<DataGrid AutoGenerateColumns="False" Grid.Row="1" Grid.Column="3"
>>>>> Height="Auto"
>>>>> HorizontalAlignment="Stretch"
>>>>> Margin="0"
>>>>> Name="grdAirWayBillDetails"
>>>>> VerticalAlignment="Stretch"
>>>>> Width="Auto"
>>>>> IsSynchronizedWithCurrentItem="True"
>>>>> ItemsSource="{Binding Mode=default}"
>>>>> SelectionMode="Single"
>>>>> GridLinesVisibility="None"
>>>>> HeadersVisibility="Column"
>>>>> Grid.ColumnSpan="2"
>>>>>
>>>>> CanUserAddRows="False"
>>>>> CanUserDeleteRows="False"
>>>>> SelectionUnit="Cell"
>>>>> Grid.RowSpan="4">
>>>>> <DataGrid.Resources>
>>>>> <Style x:Key="AlignRight" TargetType="DataGridCell">
>>>>> <Setter Property="HorizontalAlignment" Value="Right" />
>>>>>
>>>>> </Style>
>>>>> <Style x:Key="AlignRightHeader" TargetType="DataGridColumnHeader">
>>>>> <Setter Property="HorizontalAlignment" Value="Right" />
>>>>> </Style> </DataGrid.Resources>
>>>>> <DataGrid.Columns>
>>>>> <DataGridComboBoxColumn Header="Charge Type" Width="2*"
>>>>> DisplayMemberPath="cty_name"
>>>>> SelectedValuePath="cty_pk"
>>>>> SelectedValueBinding="{Binding awd_ctyfk, Mode=Default}"/>
>>>>>
>>>>> <DataGridTextColumn Header="Amount" Width="*" Binding="{Binding awd_amount, Mode=default}"
>>>>> CellStyle="{StaticResource AlignRight}"
>>>>> HeaderStyle="{StaticResource AlignRightHeader}"/>
>>>>> </DataGrid.Columns>
>>>>> </DataGrid>>>>>>
>>>>>This is my AddDetailRow() code:
>>>>>
>>>>>
private void AddDetailRow()
>>>>> {
>>>>> AirWayBillDetailEntity entity = this.AirWayBillDetail.NewEntity(new AirWayBillDetailDefaults(this.AirWayBill.Entity.awb_pk));
>>>>>
>>>>> // Select cell and begin edit
>>>>> this.grdAirWayBillDetails.CommitEdit();
>>>>>
>>>>> this.grdAirWayBillDetails.Focus();
>>>>> System.Windows.Controls.DataGridCellInfo cellInfo = new System.Windows.Controls.DataGridCellInfo(entity, this.grdAirWayBillDetails.Columns[0]);
>>>>> this.grdAirWayBillDetails.SelectedCells.Clear();
>>>>> this.grdAirWayBillDetails.SelectedCells.Add(cellInfo);
>>>>> this.grdAirWayBillDetails.CurrentCell = cellInfo;
>>>>> this.grdAirWayBillDetails.BeginEdit();
>>>>> }>>>>>
>>>>>This code causes the total of the amount column in the grid to get calculated:
>>>>>
>>>>>
void AirWayBillDetail_StateChange(mmBaseBusinessObject bizObj, mmBusinessStateChangeEventArgs e)
>>>>> {
>>>>> if (e.State == mmBusinessState.Retrieved)
>>>>> {
>>>>> // Store the Air WayBill Detail in the DataGrid's data context
>>>>> this.grdAirWayBillDetails.DataContext = this.AirWayBillDetail.EntityList;
>>>>>
>>>>> // Hide the new item row place holder in the Air WayBill Detail DataGrid
>>>>> ((IEditableCollectionView)CollectionViewSource.GetDefaultView(grdAirWayBillDetails.ItemsSource)).NewItemPlaceholderPosition =
>>>>> NewItemPlaceholderPosition.None;
>>>>> }
>>>>> //this.ShowAirWayBillTotal();
>>>>> if (this.AirWayBillDetail.EntityList != null)
>>>>> {
>>>>> this.AirWayBillTotal = this.AirWayBillDetail.EntityList.Sum(x => x.awd_amount);
>>>>> foreach (var c in this.AirWayBillDetail.EntityList)
>>>>> {
>>>>> c.PropertyChanged += CollectionItemChanged;
>>>>> }
>>>>> }
>>>>>
>>>>> }>>>>>
>>>>>This is what I have in my CollectionItemChanged:
>>>>>
>>>>>
void CollectionItemChanged(object sender, PropertyChangedEventArgs e)
>>>>> {
>>>>> if (e.PropertyName == "awd_amount")
>>>>> {
>>>>> AirWayBillTotal = AirWayBillDetail.EntityList.Sum(x => x.awd_amount);
>>>>> OnPropertyChanged("AirWayBillTotal");
>>>>> AddDetailRow();
>>>>> }
>>>>> }>>>>>
>>>>>What is happening now is that if I press Tab after entering an amount, a new row gets added, but focus goes to the next control in the tab order after the grid. So I have two questions:
>>>>>
>>>>>1. How to check if I'm on the last row?
>>>>>
>>>>>2. How to set focus to the combo?
>>>>>
>>>>>
update:>>>>>
>>>>>I have got a bit further with this using the PreviewKeyDown event and checking for Return, then calling my AddDetailRow(), but when I do this the combobox is not visible!
