builder.AppendFormat(" update RB_Class_Plan SET ClassDate='{0}' where ClassPlanId ={1};",newChangePlanItemModel.ClassDate,item.ClassPlanId);
builder.AppendFormat(" update RB_Class_Plan SET ClassDate='{0}' where ClassPlanId ={1};",Common.ConvertHelper.FormatDate(newChangePlanItemModel.ClassDate),item.ClassPlanId);