Grid手动添加模板列数据丢失有关问题

//这是添加模板列的代码//添加头模板dt_name.HeaderTemplate = new Bussiness.CollapsibleGridViewBussiness<CheckBox>(DataControlRowType.Header, "仓库名称", null, null);//添加普通状态的模板            dt_name.ItemTemplate = new Bussiness.CollapsibleGridViewBussiness<Label>(DataControlRowType.DataRow, "",null , new string[] { "dt_name" });            DropDownList ddl = new DropDownList();            ddl.ID = "ddl1";            ddl.Width = 75;//添加被编辑状态下的模板            dt_name.EditItemTemplate = new Bussiness.CollapsibleGridViewBussiness<DropDownList>(DataControlRowType.DataRow,"", ddl, null);

//这是RowEditing事件触发后调用的方法bool Edit(int RowIndex)    {        //Rows[RowIndex].Cells[2]是模板列,但是取值不到        string dt_name = CollapsibleGridView1.gv.Rows[RowIndex].Cells[2].Text;        CollapsibleGridView1.gv.EditIndex = RowIndex;        //数据绑定        CollapsibleGridView1.bindevent();        //而在数据绑定后(转成Edit状态后)则可以取到Cells[2]的控件        DropDownList ddl = CollapsibleGridView1.gv.Rows[RowIndex].Cells[2].Controls[0] as DropDownList;        sb.SetShopUpdateDDL(ddl, dt_name);        return false;    }