asp.net core dbContext isn't for share.
2019, Feb 14
Entity Framework and DbContext
In short, if inject the DbContext into service and then inject service into controller.
DbContext isn’t designed to support sharing crossing thread.
// Define Local Scope
private readonly AsyncLocal<Scope> scopeProvider = new AsyncLocal<Scope>();
private object RequestScope(IContext context) => scopeProvider.Value;
// Define injection scope with Ninject
kernel.Bind<DbContext>().To<SqlDbContext>().InScope(RequestScope);
kernel.Bind<ISomeDao>().To<SomeDao>().InScope(RequestScope);
kernel.Bind<SomeServiceUseDao>().ToSelf().InScope(RequestScope);