/// <summary>
/// 根据行，列索引来获取RepositoryItem
/// </summary>
/// <param name="view">GridView</param>
/// <param name="rowIndex">行索引</param>
/// <param name="columnIndex">列索引</param>
/// <returns>RepositoryItem</returns>
public static RepositoryItem GetRepositoryItem(this GridView view, int rowIndex, int columnIndex)
{
  GridViewInfo _viewInfo = view.GetViewInfo() as GridViewInfo;
  GridDataRowInfo _viewRowInfo = _viewInfo.RowsInfo.FindRow(rowIndex) as GridDataRowInfo;
  return _viewRowInfo.Cells[columnIndex].Editor;
}