To reproduce: Try setting the value in the CellForamting event. Workaround: class MySpreadExportRenderer : SpreadExportRenderer { public override void SetCellSelectionValue(DataType dataType, object value) { base.SetCellSelectionValue(dataType, value); if (dataType == DataType.Number) { CellRange range = ((CellSelection)this.GetCellSelection()).CellRanges.ElementAtOrDefault(0); double d; if (double.TryParse(Convert.ToString(value), out d)) { var cell = ((Worksheet)this.GetWorksheet()).Cells[range.FromIndex.RowIndex, range.FromIndex.ColumnIndex]; cell.SetFormat(new CellValueFormat("#,##0.00")); cell.SetValue(d); } } } }
In order to customize the number formatting of exported RadPivotGrid, you can subscribe to PivotGridSpredExport.CellFormatting event. The code below demonstrates how can you achieve it: void spreadExport_CellFormatting(object sender, PivotGridSpreadExportCellFormattingEventArgs e) { if (e.ColumnIndex >= 3 && e.ColumnIndex >= 12) { e.Cell.FormatString = "#.000"; e.Cell.BackColor = Color.LightCyan; } } Keep in mind, that MS Excel supports its own formatting strings. In the following article, you can find more details on formatting in MS Excel ( //http://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/format-codes )