I have had a problem that I have finally found a solution.

My users require the ability for the focus to be moved to the first column of the next data row when the press enter on the insertion row. They are happy to use the arrow keys to move around the grid and the tab key whilst in edit mode but when they pressed the Enter key the were very unhappy the focus remained on the column that had the focus when the pressed the Enter key. This meant they would have to either left mouse click into the first column or move there by use of arrow keys etc...  I like to keep my users happy so here is my attempt at moving the focus to first column after the Enter key has been pressed.

Please note; this currently only works when a user inserts a new row but that is by design.

Xaml

<xcdg:DataGridControl Name="TestGrid"

                      PreviewKeyUp="TestGrid_PreviewKeyUp"

                      xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">

    <xcdg:DataGridControl.View>

        <xcdg:TableView UseDefaultHeadersFooters="False">

            <xcdg:TableView.Footers>

               <DataTemplate>

                    <xcdg:InsertionRow />

               </DataTemplate>

            </xcdg:TableView.Footers>

            <xcdg:TableView.FixedHeaders>

               <DataTemplate>

                    <xcdg:HierarchicalGroupByControl xcdg:TableView.CanScrollHorizontally="False" />

               </DataTemplate>

               <DataTemplate>

                    <xcdg:ColumnManagerRow />

               </DataTemplate>

            </xcdg:TableView.FixedHeaders>

        </xcdg:TableView>

    </xcdg:DataGridControl.View>

</xcdg:DataGridControl>

VB Code

    Private Sub TestGrid_PreviewKeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.KeyEventArgs)

        If e.Key = Key.Enter Then

            Dim grid As DataGridControl = sender

            Dim c As Column = grid.CurrentColumn

            Dim row As Integer = grid.SelectedIndex

            If c IsNot Nothing And c.HasValidationError = False And row = -1 Then

                Dim pos As Integer = grid.VisibleColumns.IndexOf(c)

                If pos = 0 Or pos = grid.Columns.Count - 1 Then

                    c = grid.Columns(0)

                    grid.CurrentColumn = c

                    grid.BringItemIntoView(c)

                    grid.BeginEdit()

                    e.Handled = True

                Else

                    e.Handled = False

                End If

            Else

            End If

            End If

    End Sub

If will post changes to move the focus to the first column of the next row when the user presses the Enter key on an existing row, as soon as I figure out how to do that.

Here are some changes to the VB code to allow for the user to press Enter key on an existing row and for the focus to move to the first column of the next row.  Still don't know how move focus to the insertion row, so if anyone has any ideas they will be very well received.

VB Code

    Private Sub TestGrid_PreviewKeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.KeyEventArgs)

        If e.Key = Key.Enter Then

            Dim grid As DataGridControl = sender

            Dim c As Column = grid.CurrentColumn

            Dim row As Integer = grid.SelectedIndex

            If c IsNot Nothing And c.HasValidationError = False And row = -1 Then

                Dim pos As Integer = grid.VisibleColumns.IndexOf(c)

                If pos = 0 Or pos = grid.Columns.Count - 1 Then

                    c = grid.Columns(0)

                    grid.CurrentColumn = c

                    grid.BringItemIntoView(c)

                    grid.BeginEdit()

                    e.Handled = True

                Else

                    e.Handled = False

                End If

            Else

                If c IsNot Nothing And c.HasValidationError = False And row <> -1 Then

                    c = grid.Columns(0)

                    grid.CurrentColumn = c

                    grid.Items.MoveCurrentToNext()

                    e.Handled = True

                Else

                    e.Handled = False

                End If

            End If

        End If

    End Sub

Hi Stewart,

I solved in this way, first deriving the Insertion row and overriding the OnPreviewKeyDown event, then using the derived insertion row in xaml, it works for me.

    public class DerivedInsertionRow : Xceed.Wpf.DataGrid.InsertionRow
    {
        protected override void OnPreviewKeyDown(System.Windows.Input.KeyEventArgs e)
        {
            base.OnPreviewKeyDown(e);

            if (e.Key == Key.Enter)
                this.Cells[0].BeginEdit();
        }
    }
 

[cut]

            <xcdg:DataGridControl.View>
                <xcdg:TableView UseDefaultHeadersFooters="False">
                    <xcdg:TableView.Footers>
                        <DataTemplate>
                            <!--<xcdg:InsertionRow />-->
                            <views:DerivedInsertionRow/>
                        </DataTemplate>
                    </xcdg:TableView.Footers>

                </xcdg:TableView>
            </xcdg:DataGridControl.View>
[cut]

Note to activate the followin behaviour at the grid level

            CellEditorDisplayConditions="CellIsCurrent"
            EditTriggers="BeginEditCommand, CellIsCurrent, ActivationGesture"
 

Hope this helps.

Antonio

Thank you Antonio for your suggestion.

However, I thought I would tackle the problem so as to provide the solution 100% in the code behind and within the one subroutine.  The changes simply move the focus down one row only when we are one the last row. I have tested this with or without an insertion row and all works just fine.

So here is the lastest installment of PreviewKeyUp subroutine.

    Private Sub TestGrid_PreviewKeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.KeyEventArgs)

        If e.Key = Key.Enter Then

            Dim grid As DataGridControl = sender

            Dim c As Column = grid.CurrentColumn

            Dim row As Integer = grid.SelectedIndex

            If c IsNot Nothing And c.HasValidationError = False And row = -1 Then

                Dim pos As Integer = grid.VisibleColumns.IndexOf(c)

                If pos = 0 Or pos = grid.Columns.Count - 1 Then

                    c = grid.Columns(0)

                    grid.CurrentColumn = c

                    grid.BringItemIntoView(c)

                    grid.BeginEdit()

                    e.Handled = True

                Else

                    e.Handled = False

                End If

            Else

                If c IsNot Nothing And c.HasValidationError = False Then

                    c = grid.Columns(0)

                    grid.CurrentColumn = c

                    If row = grid.Items.Count - 1 Then

                        Dim focusedElement As UIElement = Keyboard.FocusedElement

                        focusedElement.MoveFocus(New TraversalRequest(FocusNavigationDirection.Down))

                        grid.BringItemIntoView(c)

                    Else

                        grid.Items.MoveCurrentToNext()

                    End If

                    e.Handled = True

                Else

                    e.Handled = False

                End If

            End If

        End If

    End Sub

I hope the provision of this subroutine makes someone's day a little easier.

Stewart

I used this solution for tabbing in V3.1 of the datagrid. Now, after upgrading to V3.2 this did not compile and it complains that grid.CurrentColumn is of type ColumnBase. I change Column to ColumnBase and it does compile and work.

Now, I'm getting a bug report from a user that portions of the datagrid disappear after tabbing and I'm wondering if the change to ColumnBase has anything to do with the problem.

Any thoughts?