asp.net传值问题传过来的和传过去的ID不一致

labhisid.Text是根据ID传过来的ID号

然后添加数据的时候发现ID不对，是什么回事

比如传值过来的是6，传过去，保存数据的是5
7 5
8 5

正确的应该是是 5 5
6 6
7 7
这怎么解决？

            string selmaterials = txtselmaterials.Text;
            string hisid1 = labhisid.Text;
            DataTable table = BLL.ChangeOverMgr.examaterials(hisid1, selmaterials);
            if (table.Rows.Count == 1)
            {
                DataTable table1 = BLL.ChangeOverMgr.repmaterials(hisid1, selmaterials);
                if (table1.Rows.Count == 0)
                {
                    Model.Examaterials examaterials1 = new Model.Examaterials();
                    try
                    {
                        examaterials1.comaterialsid = txtselmaterials.Text;
                        examaterials1.hisid = this.labhisid.Text.ToString().Trim();
                        BLL.ChangeOverMgr.getexamaterials(examaterials1);
                        BLL.ChangeOverMgr.Savaexamaterialshis(examaterials1);
                        Response.Write("<script>alert('确认成功！');</script>");
                    }
                    catch
                    {
                        Response.Write("<script>alert('确认失败！');</script>");
                    }
                }
                else
                {
                    Response.Write("<script>alert('此已确认，请勿重复确认！');</script>");
                }
            }
            else
            {
                Response.Write("<script>alert('所输入的数据与表中数据不一致，请检查');</script>");
            }