public override HTMLElement OnCreate(DataGridView gridView, int dataRowIndex, int columnIndex) { var value = gridView.GetRowCellValue(dataRowIndex, columnIndex); var cell = Helper.Element(new HTMLTableCellElement()); var input = new CheckBox(); input.SetBoundsFull(); input.Checked = value.As <bool>(); input.Element.style.margin = "0"; cell.appendChild(input); return(cell); }