Index Out Of Range

I try to put CheckBox in the headers of my GridDataBoundGrid. I have 2 nested relation. My Checkbox box are located in the third row, the row of the second relation. I use your example "How to put a checkbox in headers". I can see them, but when i click on one of them i have this Exception: " System.ArgumentOutOfRangeException: L''argument spécifié n''était pas dans les limites de la plage des valeurs valides. Nom du paramètre : rowIndex at Syncfusion.Collections.SFTable.set_Item(Int32 rowIndex, Int32 colIndex, Object value) at Syncfusion.Windows.Forms.Grid.GridRowCollection.set_Item(Int32 rowIndex, Int32 colIndex, GridStyleInfoStore value) at Syncfusion.Windows.Forms.Grid.GridData.set_Item(Int32 rowIndex, Int32 colIndex, GridStyleInfoStore value) at Syncfusion.Windows.Forms.Grid.GridModel.SetCellInfo(Int32 rowIndex, Int32 colIndex, GridStyleInfo style, StyleModifyType modifyType, Boolean dontRaiseSaveCellInfoEvent, Boolean copyReferenceOnly)" I have to double click on the checkbox to check them, and it takes a long time. Any Ideas? thx. jerome PS: my code private void Model_QueryCellInfo(object sender, GridQueryCellInfoEventArgs e) { if(e.RowIndex==2) { e.Style.CellValueType = typeof(string); if(CheckedHeaders.Contains(e.ColIndex)) e.Style.CellValue = (string) CheckedHeaders[e.ColIndex]; e.Style.CheckBoxOptions = new GridCheckBoxCellInfo(true.ToString(), false.ToString(), "", true); e.Style.CellType = "CheckBox"; e.Style.CellAppearance = GridCellAppearance.Raised; e.Style.Enabled = true; } } private void Model_SaveCellInfo(object sender, GridSaveCellInfoEventArgs e) { if(e.RowIndex==2) { if (e.Style.CellValue!=null) CheckedHeaders[e.ColIndex] = (string) e.Style.CellValue; e.Style.Enabled = true; } }

Sorry, i forgot: I m using version 3.3 Regards, jerome

Hi Jerome, Try setting Model.Data.RowCount with Model.RowCount after setting the datasource to see if this helps. this.gridDataBoundGrid1.Model.Data.RowCount = this.gridDataBoundGrid1.Model.RowCount; Regards, Calvin.

Thx a lot, it works very well, jerome