【优化】并发下单场景用户金额变动增加事务锁的悲观锁等待模式，防止出现金额异常情况。

CoreCms.Net.Repository/BaseRepository.cs

@@ -373,6 +373,25 @@ namespace CoreCms.Net.Repository
                 : await DbBaseClient.Queryable<T>().OrderBy(orderByPredicate, orderByType).FirstAsync(predicate);
         }
 
+
+        /// <summary>
+        ///     根据条件查询数据（悲观锁等待模式）
+        /// </summary>
+        /// <param name="predicate">条件表达式树</param>
+        /// <param name="orderByPredicate">排序字段</param>
+        /// <param name="orderByType">排序顺序</param>
+        /// <param name="blUseTranLock">是否使用TranLock</param>
+        /// <returns></returns>
+        public async Task<T> QueryByClauseWithTranLockAsync(Expression<Func<T, bool>> predicate,
+            Expression<Func<T, object>> orderByPredicate, OrderByType orderByType, bool blUseTranLock = false)
+        {
+            return blUseTranLock
+                ? await DbBaseClient.Queryable<T>().TranLock(DbLockType.Wait).OrderBy(orderByPredicate, orderByType)
+                    .FirstAsync(predicate)
+                : await DbBaseClient.Queryable<T>().OrderBy(orderByPredicate, orderByType).FirstAsync(predicate);
+        }
+
+
         /// <summary>
         ///     写入实体数据
         /// </summary>