[英]ASP.NET Core stored procedure not working in loop
I want to use a stored procedure for DB query, it works for a single query, but in loop, it executes like in first loop iteration. 我想对数据库查询使用存储过程,它适用于单个查询,但是在循环中,它的执行类似于第一次循环迭代。
var getAutoResults = new List<List<Karat_getAutoData_Result>>();
foreach (var elem in meas)
{
getAutoResults.Add(await _context.KaratGetAutoDataResults
.FromSql($"dbo.Karat_getAutoData @MeasurementId = {elem.MeasurementId}, @CalcRequestId = {null}")
.ToListAsync());
}
After this I get N times the same results, but all ids are different. 在此之后,我得到了N次相同的结果,但是所有id都不相同。
I can resolve it only like this. 我只能这样解决。 I'm just creating new context instance in each loop.
我只是在每个循环中创建新的上下文实例。 I think this is bad idea, but it works.
我认为这是个坏主意,但确实有效。
var getAutoResults = new List<List<Karat_getAutoData_Result>>();
var optionsBuilder = new DbContextOptionsBuilder<TestRecipesDBContext>();
optionsBuilder.UseSqlServer("MY CONNECTION STRING");
foreach (var elem in meas)
{
using (var localContext = new TestRecipesDBContext(optionsBuilder.Options))
{
getAutoResults.Add(await localContext.KaratGetAutoDataResults
.FromSql($"dbo.Karat_getAutoData @MeasurementId={elem.MeasurementId},@CalcRequestId={null}")
.ToListAsync());
}
}
Solution below more usefull, just need use AsNoTracking() : 下面的解决方案更有用,只需使用AsNoTracking()即可 :
getAutoResults.Add(await localContext.KaratGetAutoDataResults .FromSql($"dbo.Karat_getAutoData @MeasurementId=elem.MeasurementId},@CalcRequestId={null}") .AsNoTracking()
.ToListAsync());
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.