///展开所有明细
        private List<int> expandedRows = new List<int>();
        void ExpandAllDetails(GridView gridview)
        {
            if (gridview.RowCount>0)
            {
                expandedRows.Clear();
                gridview.BeginUpdate();
                try
                {
                    int dataRowCount = gridview.DataRowCount;
                    int rHandle = 0;
                    for (rHandle = 0; rHandle < dataRowCount; rHandle++)
                    {
                        expandedRows.Add(rHandle);
                    }
                }
                finally
                {
                    gridview.EndUpdate();
                }
                ExpandDetails(gridview);
            }

        }

        private void ExpandDetails(GridView view)
        {
            GridViewInfo info = (GridViewInfo)view.GetViewInfo();
            foreach (GridDataRowInfo rInfo in info.RowsInfo)
            {
                if (expandedRows.Contains(rInfo.RowHandle))
                {
                    view.ExpandMasterRow(rInfo.RowHandle);
                    expandedRows.Remove(rInfo.RowHandle);
                }
            }
        }