How to optimize the ResizeToFit method for large number of records in WinForms GridGroupingControl?

Optimize the ResizeToFit method

The mechanism of the ResizetoFit method is that it checks each value of the cells and its width and then calculates the width of the column. So, when you check for rows above 44k, it takes more time than expected. The solution for this problem is, you can apply the ResizetoFit method only for the visible layout. That is, instead of applying the ResizetoFit method to the whole WinForms GridGroupingControl, you can apply this method to the viewable cells. You can get the viewable cells row and column index by using the TableControlVScrollPixelPosChanged event.

Refer to the following code examples for the TableControlVScrollPixelPosChanged event.

// Event triggering
this.gridGroupingControl1.TableControlVScrollPixelPosChanged += new GridTableControlScrollPositionChangedEventHandler(gridGroupingControl1_TableControlVScrollPixelPosChanged);

void gridGroupingControl1_TableControlVScrollPixelPosChanged(object sender, GridTableControlScrollPositionChangedEventArgs e)
{
    // Denotes the top visible row index of the grid.
    int top_rowIndex = this.gridGroupingControl1.TableControl.TopRowIndex;

    // ViewLayout.VisibleRows gives you the number of visible rows in the ViewLayout.
    int bottom_rowindex = top_rowIndex +
        this.gridGroupingControl1.TableControl.ViewLayout.VisibleRows;

    this.gridGroupingControl1.TableModel.ColWidths.ResizeToFit(
        GridRangeInfo.Cells(
            top_rowIndex, 
            0, 
            bottom_rowindex, 
            this.gridGroupingControl1.TableModel.ColCount),
        GridResizeToFitOptions.IncludeHeaders | 
        GridResizeToFitOptions.IncludeCellsWithinCoveredRange);
}

'Event triggering
AddHandler gridGroupingControl1.TableControlVScrollPixelPosChanged, AddressOf gridGroupingControl1_TableControlVScrollPixelPosChanged

Private Sub gridGroupingControl1_TableControlVScrollPixelPosChanged(ByVal sender As Object, ByVal e As GridTableControlScrollPositionChangedEventArgs)

    'Denotes the top visible row index of the grid.
    Dim top_rowIndex As Integer = gridGroupingControl1.TableControl.TopRowIndex

    'ViewLayout.VisibleRows gives you the number of visible rows in the ViewLayout.
    Dim bottom_rowindex As Integer = top_rowIndex + 
        gridGroupingControl1.TableControl.ViewLayout.VisibleRows

    gridGroupingControl1.TableModel.ColWidths.ResizeToFit(
        GridRangeInfo.Cells(
            top_rowIndex, 
            0, 
            bottom_rowindex, 
            gridGroupingControl1.TableModel.ColCount),
        GridResizeToFitOptions.IncludeHeaders Or 
        GridResizeToFitOptions.IncludeCellsWithinCoveredRange)
End Sub

Another suggestion is that you can use the QueryColWidth event instead of using ResizeToFit method. Refer to the following code example. In this event, you can change the size of each column with the help of index value.

//Event trigerring.
this.gridGroupingControl1.TableModel.QueryColWidth += new GridRowColSizeEventHandler(TableModel_QueryColWidth);

void TableModel_QueryColWidth(object sender, GridRowColSizeEventArgs e)
{
    if (e.Index > 0)
        // Add the condition which satisfy your needs.
        e.Size = 150;
}

' Event triggering
AddHandler gridGroupingControl1.TableModel.QueryColWidth, AddressOf TableModel_QueryColWidth

Private Sub TableModel_QueryColWidth(ByVal sender As Object, ByVal e As GridRowColSizeEventArgs)
 If e.Index > 0 Then ' Add the condition which satisfy your needs.
    e.Size = 150
 End If
End Sub

Samples:

C#: ResizeToFit_CS

VB: ResizeToFit_VB

Conclusion

I hope you enjoyed learning about how to optimize the ResizeToFit method for a large number of records in the WinForms GridGroupingControl.

You can refer to our WinForms GridGroupingControl’s feature tour page to know about its other groundbreaking feature representations. You can also explore our WinForms GridGroupingControl documentation to understand how to present and manipulate data.

For current customers, you can check out our WinForms components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our WinForms GridGroupingControl and other WinForms components.

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How to optimize the ResizeToFit method for large number of records in WinForms GridGroupingControl?

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