BaseBusiness判断数据是否唯一 - IsUnique

2017-03-05 07:56:31 访问(2076) 赞(0) 踩(0)



        /// <summary>
        /// BaseBusiness判断数据是否唯一 - IsUnique
        /// </summary>
        /// <param name="pkValue"></param>
        /// <param name="dataColumnName"></param>
        /// <param name="dataColumnValue"></param>
        /// <param name="xdbHelper">数据库链接串</param>
        /// <returns></returns>
        public bool IsUnique
            (
                object pkValue,
                string dataColumnName,
                object dataColumnValue,
                DBHelper xdbHelper
            )
        {
            bool theResult = false;

            bool bIsCreate = true;

            if (xdbHelper == null)
            {
                xdbHelper
                    =
                    SlowX.DAL.Helpers.DBHelper.CreateDBHelper();
            }
            else
            {
                // 没有打开链接 //
                bIsCreate = xdbHelper.IsNotOpen();
            }

            try
            {
                if (bIsCreate)
                    xdbHelper.OpenDBHelper();

                BaseEntity entity = this.CreateBaseEntity();

                IQueryDriver iq = entity;

                EntityFieldInfo pkInfo
                    =
                    entity.GetIDEntityFieldInfo();

                iq.AddIQueryItemWithEntityFieldInfo(pkInfo, Enums.SqlLink.EmSqlLink.NotEqual, pkValue);
                iq.AddIQueryItemWithEntityFieldInfoName(dataColumnName, dataColumnValue);

                theResult = !IsExist(entity, xdbHelper);

                if (bIsCreate)
                    xdbHelper.EndDBHelper();

            }
            catch (Exception err)
            {
                if (bIsCreate)
                    xdbHelper.TranDBHelper();

                throw err;
            }
            finally
            {
                if (bIsCreate)
                    xdbHelper.FinallyDBHelper();
            }

            return theResult;

        }