How to update the table summary value when the cell in edit mode in UWP DataGrid (SfDataGrid) ?

dataGrid.AllowEditing = true;
dataGrid.LiveDataUpdateMode = LiveDataUpdateMode.AllowSummaryUpdate;
this.dataGrid.CellRenderers.Remove("Numeric");
this.dataGrid.CellRenderers.Add("Numeric", new CustomizedGridCellNumericRenderer(dataGrid));internal class CustomizedGridCellNumericRenderer : GridCellNumericRenderer
{
    RowColumnIndex RowColumnIndex;
    SfDataGrid DataGrid { get; set; }
    string newvalue = null;
 
    public CustomizedGridCellNumericRenderer(SfDataGrid dataGrid)
    {
        DataGrid = dataGrid;
    }
 
    public override void OnInitializeEditElement(DataColumnBase dataColumn, SfNumericTextBox uiElement, object dataContext)
    {
        base.OnInitializeEditElement(dataColumn, uiElement, dataContext);
        uiElement.ValueChanged += UiElement_ValueChanged;
        this.RowColumnIndex.ColumnIndex = dataColumn.ColumnIndex;
        this.RowColumnIndex.RowIndex = dataColumn.RowIndex;
    }
 
    private void UiElement_ValueChanged(object sender, ValueChangedEventArgs e)
    {
        newvalue = e.NewValue.ToString();
        UpdateSummaryValues(this.RowColumnIndex.RowIndex, this.RowColumnIndex.ColumnIndex);
    }
 
    private void UpdateSummaryValues(int rowIndex, int columnIndex)
    {
        string editEelementText = newvalue == "0" ? "0" : newvalue;
        columnIndex = this.DataGrid.ResolveToGridVisibleColumnIndex(columnIndex);
        if (columnIndex < 0)
            return;
        var mappingName = DataGrid.Columns[columnIndex].MappingName;
        var recordIndex = this.DataGrid.ResolveToRecordIndex(rowIndex);
        if (recordIndex < 0)
            return;
        if (DataGrid.View.TopLevelGroup != null)
        {
            var record = DataGrid.View.TopLevelGroup.DisplayElements[recordIndex];
            if (!record.IsRecords)
                return;
            var data = (record as RecordEntry).Data;
            data.GetType().GetProperty(mappingName).SetValue(data, (int.Parse(editEelementText)));
        }
        else
        {
            var record1 = DataGrid.View.Records.GetItemAt(recordIndex);
            record1.GetType().GetProperty(mappingName).SetValue(record1, (int.Parse(editEelementText)));
        }
    }
}