public int DeleteCellphone(string beforeCellphone1)
        {
            var resultSP = DB.DeleteCellphone(beforeCellphone1);

            if (GlobalVariable.queryType == 0)
            {
                BeforeCellphone beforeCellphone = DB.BeforeCellphones.Where(c => c.beforeCellphone1.Equals(beforeCellphone1)).SingleOrDefault();
                DB.BeforeCellphones.Attach(beforeCellphone);
                if (beforeCellphone == null)
                {
                    return(0);
                }
                DB.BeforeCellphones.Remove(beforeCellphone);
                DB.SaveChanges();
                return(1);
            }
            else
            {
                return(resultSP);
            }
        }
        public CellphoneModel UpdateCellphone(CellphoneModel cellphoneModel)
        {
            var resultSP = DB.UpdateCellphone(cellphoneModel.beforeCellphone).Select(beforeCellphone2 => new CellphoneModel
            {
                beforeCellphone = beforeCellphone2
            });

            if (GlobalVariable.queryType == 0)
            {
                BeforeCellphone beforeCellphone = DB.BeforeCellphones.Where(c => c.beforeCellphone1.Equals(cellphoneModel.beforeCellphone)).SingleOrDefault();
                if (beforeCellphone == null)
                {
                    return(null);
                }
                beforeCellphone.beforeCellphone1 = cellphoneModel.beforeCellphone;
                DB.SaveChanges();
                return(GetOneBeforeCellphone(beforeCellphone.beforeCellphone1));
            }
            else
            {
                return(resultSP.SingleOrDefault());
            }
        }
        public CellphoneModel AddCellphone(CellphoneModel cellphoneModel)
        {
            var resultSP = DB.AddCellphone(cellphoneModel.beforeCellphone).Select(beforeCellphone2 => new CellphoneModel
            {
                beforeCellphone = beforeCellphone2
            });

            if (GlobalVariable.queryType == 0)
            {
                BeforeCellphone beforeCellphone = new BeforeCellphone
                {
                    beforeCellphone1 = cellphoneModel.beforeCellphone
                };

                DB.BeforeCellphones.Add(beforeCellphone);
                DB.SaveChanges();
                return(GetOneBeforeCellphone(beforeCellphone.beforeCellphone1));
            }
            else
            {
                return(resultSP.SingleOrDefault());
            }
        }