/// <summary>
/// 添加单元格
/// </summary>
/// <param name="columnIndex">列索引</param>
/// <param name="cell">单元格</param>
public void addCell(int columnIndex, FCGridCell cell)
{
cell.Grid = m_grid;
cell.Column = m_grid.getColumn(columnIndex);
cell.Row = this;
m_cells.add(cell);
cell.onAdd();
}