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How to freeze the summary row at bottom of the grid in WinForms GridGroupingControl?

Platform: WinForms |
Control: GridGroupingControl
Tags: summaries


By default, the GridGroupingControl does not have support to freeze a summary row. To achieve place a single row at the bottom of the grid and set the calculated summary values to that grid cell which acts as a summary row.

GridControl customization


public class EngineSummaryGrid
     private GridControl grid;
     private GridGroupingControl parentGrid;
     public void WiredSummary(GridGroupingControl ggc)
         parentGrid = ggc;
         parentGrid.TopLevelGroupOptions.ShowSummaries = false;
         parentGrid.TableModel.QueryColWidth += TableModel_QueryColWidth;
         parentGrid.TableControl.Layout += TableControl_Layout;
         //Initializing the grid with single row.
         grid = new GridControl();
         grid.ThemesEnabled = true;
         grid.Model.Options.NumberedRowHeaders = false;
         grid.Model.RowCount = 1;
         this.grid.Model.ColCount = this.parentGrid.TableDescriptor.Columns.Count;
         grid.Properties.ColHeaders = false;           
     private void TableModel_QueryColWidth(object sender, GridRowColSizeEventArgs e)
         this.grid.Model.ColWidths[e.Index] = e.Size;
     private void TableControl_Layout(object sender, LayoutEventArgs e)
     private void SummaryRowSize()
         this.parentGrid.TableControl.GridBounds = new Rectangle(this.parentGrid.TableControl.GridBounds.X,
             this.parentGrid.TableControl.GridBounds.Y, this.parentGrid.TableControl.GridBounds.Width,
             this.parentGrid.TableControl.GridBounds.Height - (this.parentGrid.TableControl.DefaultRowHeight));
         int height = this.parentGrid.TableControl.GridBounds.Height + this.parentGrid.TableControl.DefaultRowHeight;
         this.grid.Location = new Point(0, height - this.parentGrid.TableControl.DefaultRowHeight);
         this.grid.Size = new Size(this.parentGrid.TableControl.ClientSize.Width, this.parentGrid.TableControl.DefaultRowHeight);



Public Class EngineSummaryGrid
     Private grid As GridControl
     Private parentGrid As GridGroupingControl
     Public Sub WiredSummary(ByVal ggc As GridGroupingControl)
         parentGrid = ggc
         parentGrid.TopLevelGroupOptions.ShowSummaries = False
         AddHandler parentGrid.TableModel.QueryColWidth, AddressOf TableModel_QueryColWidth
         AddHandler parentGrid.TableControl.Layout, AddressOf TableControl_Layout
         'Initializing the grid with single row.
         grid = New GridControl()
         grid.ThemesEnabled = True
         grid.Model.Options.NumberedRowHeaders = False
         grid.Model.RowCount = 1
         Me.grid.Model.ColCount = Me.parentGrid.TableDescriptor.Columns.Count
         grid.Properties.ColHeaders = False
     End Sub
     Private Sub TableModel_QueryColWidth(ByVal sender As Object, ByVal e As GridRowColSizeEventArgs)
         Me.grid.Model.ColWidths(e.Index) = e.Size
     End Sub
     Private Sub TableControl_Layout(ByVal sender As Object, ByVal e As LayoutEventArgs)
     End Sub    
     Private Sub SummaryRowSize()
         Me.parentGrid.TableControl.GridBounds = New Rectangle(Me.parentGrid.TableControl.GridBounds.X,
            Me.parentGrid.TableControl.GridBounds.Height - (Me.parentGrid.TableControl.DefaultRowHeight))
         Dim height As Integer = Me.parentGrid.TableControl.GridBounds.Height + Me.parentGrid.TableControl.DefaultRowHeight
         Me.grid.Location = New Point(0, height - Me.parentGrid.TableControl.DefaultRowHeight)
         Me.grid.Size = New Size(Me.parentGrid.TableControl.ClientSize.Width, Me.parentGrid.TableControl.DefaultRowHeight)
     End Sub
 End Class


Setting the Summary value to GridControl


private void SetSummary(GridGroupingControl ggc)
     for (int j = 0; j < grid.Model.ColCount; j++)
         GridSummaryRowDescriptor row = ggc.TableDescriptor.SummaryRows[0];
         GridSummaryColumnDescriptor scd = row.GetSummaryColumnAtCol(j);
         if (scd != null)
             string text = scd.GetDisplayText(ggc.Engine.Table.DisplayElements[0].ParentGroup);
             grid.Model[1, j].CellValue = row.Title;
             grid.Model[1, j + 1].CellValue = text;
             grid.Model[1, j + 1].Enabled = false;



Private Sub SetSummary(ByVal ggc As GridGroupingControl)
    For j As Integer = 0 To grid.Model.ColCount - 1
        Dim row As GridSummaryRowDescriptor = ggc.TableDescriptor.SummaryRows(0)
        Dim scd As GridSummaryColumnDescriptor = row.GetSummaryColumnAtCol(j)
        If scd IsNot Nothing Then
 Dim text As String = scd.GetDisplayText(ggc.Engine.Table.DisplayElements(0).ParentGroup)
 grid.Model(1, j).CellValue = row.Title
 grid.Model(1, j + 1).CellValue = text
 grid.Model(1, j + 1).Enabled = False
        End If
    Next j
End Sub


Adding customized grid to GridGroupingControl


//To add the summary row grid to GridGrouping control
SummaryGrid = new EngineSummaryGrid();



'To add the summary row grid to GridGrouping control 
 SummaryGrid = New EngineSummaryGrid()



Freeze the summary row at bottom of the grid



By this solution, the summary values will not be updated when modifying records in the grid.



C#: Freezing SummaryRow_CS

VB: Freezing SummaryRow_VB

Reference link: https://help.syncfusion.com/windowsforms/gridgrouping/summaries

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