C# 无法从';无效';到System.Threading.Tasks.Task<;系统行动>;
我已经使用hangfire.Net编写了通用方法。基本上,我想实现我已经生成了一个方法,并希望在需要时多次调用它。我的助手方法如下:C# 无法从';无效';到System.Threading.Tasks.Task<;系统行动>;,c#,.net,entity-framework,hangfire,C#,.net,Entity Framework,Hangfire,我已经使用hangfire.Net编写了通用方法。基本上,我想实现我已经生成了一个方法,并希望在需要时多次调用它。我的助手方法如下: public static void ScheduleBackGroundJob(Task<Action> _refmethod, DateTime _dateTime) { try { var _currentDate = DateTime.Now; TimeS
public static void ScheduleBackGroundJob(Task<Action> _refmethod, DateTime _dateTime)
{
try
{
var _currentDate = DateTime.Now;
TimeSpan _timeSpan = _dateTime - _currentDate;
BackgroundJob.Schedule(() => _refmethod, _timeSpan);
}
catch (Exception ex)
{
throw ex;
}
}
下面是我的UpdateActionStatus方法
public void UpdateAuctionStatus(AuctionReturnModel model)
{
try
{
var _auction = (from d in _db.Auction_Detail where d.Id == model.AuctionDetailId select d).FirstOrDefault();
_auction.isEnded = true;
_db.Auction_Detail.Add(_auction);
_db.SaveChanges();
var _auctionHistory = new AuctionHistory { AuctionDetail_Id = model.AuctionDetailId, EndedDate = DateTime.Now, EndedMethod = "Automatic" };
_db.AuctionHistory.Add(_auctionHistory);
_db.SaveChanges();
Task.WaitAll();
}
catch (Exception ex)
{
throw ex;
}
}
我的上述错误无法转换为无效。我想通过将任何方法作为参数发送来调用它。我已经通过如下更改我的方法来完成
public static void ScheduleBackGroundJob(Expression<Action> _refmethod, DateTime _dateTime)
{
try
{
var _currentDate = DateTime.Now;
TimeSpan _timeSpan = _dateTime - _currentDate;
BackgroundJob.Schedule(_refmethod, _timeSpan);
}
catch (Exception ex)
{
throw ex;
}
}
我的服务方式我已经改变了
public async Task UpdateAuctionStatus(AuctionReturnModel model)
{
try
{
var _auction = await (from d in _db.Auction_Detail where d.Id == model.AuctionDetailId select d).FirstOrDefaultAsync();
_auction.isEnded = true;
_db.Auction_Detail.Add(_auction);
_db.SaveChanges();
var _auctionHistory = new AuctionHistory { AuctionDetail_Id = model.AuctionDetailId, EndedDate = DateTime.Now, EndedMethod = "Automatic" };
_db.AuctionHistory.Add(_auctionHistory);
_db.SaveChanges();
Task.WaitAll();
}
catch (Exception ex)
{
throw ex;
}
}
希望这对你将来有所帮助。任何代码审查和最佳实践都将受到高度赞赏,因为我总是希望学习一些新的更好的方法来解决问题。Task.WaitAll();-->在这种情况下,这没有任何作用。不确定它是否会导致错误您没有传递方法,您正在尝试调用
\u service.updateActionStatus(result)
,并将其返回值(即void
)传递给预期任务的参数,因此出现错误。您的参数可能只是一个操作
,而不是任务
,然后您可以传递()=>\u service.updateActionStatus(结果)
相反。当我将其转换为任务时,它会给我错误调用background.schedule job,并在我执行时传递Action参数。基本上,我想要实现的是重用HangfireHelper.ScheduleBackGroundJob()方法。我们将非常感谢您的帮助。
HangfireHelper.ScheduleBackGroundJob(() => _service.UpdateAuctionStatus(result), result.PlannedCloseDate);
public async Task UpdateAuctionStatus(AuctionReturnModel model)
{
try
{
var _auction = await (from d in _db.Auction_Detail where d.Id == model.AuctionDetailId select d).FirstOrDefaultAsync();
_auction.isEnded = true;
_db.Auction_Detail.Add(_auction);
_db.SaveChanges();
var _auctionHistory = new AuctionHistory { AuctionDetail_Id = model.AuctionDetailId, EndedDate = DateTime.Now, EndedMethod = "Automatic" };
_db.AuctionHistory.Add(_auctionHistory);
_db.SaveChanges();
Task.WaitAll();
}
catch (Exception ex)
{
throw ex;
}
}