DevExpress实现根据行，列索引来获取RepositoryItem的方法

/// 

/// 根据行，列索引来获取RepositoryItem
/// 
/// GridView
/// 行索引
/// 列索引
/// RepositoryItem
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;
}