.Net Core2.0基于DbContext,IActionFilter过滤器实现全局UOW,不使用TransactionScope

时间：2017-09-04 17:20:10 阅读：520 评论：0 收藏：0 [点我收藏+]

抛弃TransactionScope

之前实现过类似功能是使用的TransactionScope,总碰到这样那样的问题,新项目迁移到.net core2.0下,果断抛弃之前的写法,因为DbContext的SaveChanges方法已经实现了UOW的功能

定义UOW

public interface IUnitOfWork
    {
        /// <summary>
        /// 提交事务
        /// </summary>
        /// <returns>受影响行数</returns>
        int Commit();
    }

 public class UnitOfWork : IUnitOfWork
    {
        private readonly IDbContext _context;

        public UnitOfWork( IDbContext context)
        {
            _context = context ?? throw new ArgumentNullException(nameof(context));
        }

        public int Commit()
        {
            return _context.SaveChanges();
        }
    }

定义IActionFilter实现类

如果action执行结束后未发现异常,则提交事务(最终调用DbContext的SaveChanges方法)

public class GenericBusinessActionFilter : IActionFilter
    {
        private readonly IUnitOfWork _unitOfWork;

        public GenericBusinessActionFilter(IUnitOfWork unitOfWork)
        {
            _unitOfWork = unitOfWork;
        }
        public void OnActionExecuting(ActionExecutingContext context)
        {
            // do something before the action executes
        }
        public void OnActionExecuted(ActionExecutedContext context)
        {
            if (context.Exception == null)
            {
                //uow commit
                _unitOfWork.Commit();
            }
        }
    }