查询页面根据某一列分组代码

 private void FormPMOMMABW03_EF_DO_F7(object sender, EF.EF_Args e)
        {
                   
            this.isGrouped = !this.isGrouped;
            this.gridView1.ClearSorting();

            if (this.isGrouped)
            {
                this.gridView1.Columns["ST_NO"].GroupIndex = 0;
                this.gridView1.Columns["ST_NO"].SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Count;
                this.gridView1.Columns["ST_NO"].SummaryItem.DisplayFormat = "个数:{0}";
                this.gridView1.Columns["ST_NO"].SummaryItem.FieldName = "ST_NO";
                this.gridView1.Columns["NOM_SLAB_WT"].SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Sum;
                this.gridView1.Columns["NOM_SLAB_WT"].SummaryItem.DisplayFormat = "总重:{0}T";
                this.gridView1.Columns["NOM_SLAB_WT"].SummaryItem.FieldName = "NOM_SLAB_WT";
                this.gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, "ST_NO", this.gridView1.Columns["ST_NO"], "小计: {0}个");
                this.gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Sum, "NOM_SLAB_WT", this.gridView2.Columns["NOM_SLAB_WT"], "总重: {0}吨");
                gridView1.ExpandAllGroups();
            }
            else
            {
                this.gridView1.Columns["ST_NO"].GroupIndex = -1;
            }

            this.gridView1.BestFitColumns();
   

        }