Entity framework 在EF core中禁用跟踪返回跟踪错误

我有这个存储库，您可以看到：

 public class TestCenterRepository:ITestCenterRepository
    {
        private readonly PetrolTestCenterDbContext _context;


        public TestCenterRepository(PetrolTestCenterDbContext context)
        {
            this._context = context;

        }
        public TestCenter GetById(Guid testCenterId)
            => _context.PetrolTestCenters.FirstOrDefault(u => u.Id == testCenterId && u.Deleted == false);

        public void Add(TestCenter testCenter)
        {
            _context.PetrolTestCenters.Add(testCenter);
            _context.SaveChanges();

        }
}

public class PetrolTestCenterDbContext : DbContext
{


public PetrolTestCenterDbContext(DbContextOptions<PetrolTestCenterDbContext> options) : base(options)
{
    ChangeTracker.LazyLoadingEnabled = false;
    ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;


}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);
    modelBuilder.ApplyConfiguration(new TestCenterConfig());

}

public DbSet<TestCenter> PetrolTestCenters { get; set; }

}

调用add函数时，出现以下错误：

'The instance of entity type 'TestCenter' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached. Consider using 'DbContextOptionsBuilder.EnableSensitiveDataLogging' to see the conflicting key values.'

因此，我尝试在我的上下文中禁用跟踪，如您所见：

 public class TestCenterRepository:ITestCenterRepository
    {
        private readonly PetrolTestCenterDbContext _context;


        public TestCenterRepository(PetrolTestCenterDbContext context)
        {
            this._context = context;

        }
        public TestCenter GetById(Guid testCenterId)
            => _context.PetrolTestCenters.FirstOrDefault(u => u.Id == testCenterId && u.Deleted == false);

        public void Add(TestCenter testCenter)
        {
            _context.PetrolTestCenters.Add(testCenter);
            _context.SaveChanges();

        }
}

public class PetrolTestCenterDbContext : DbContext
{


public PetrolTestCenterDbContext(DbContextOptions<PetrolTestCenterDbContext> options) : base(options)
{
    ChangeTracker.LazyLoadingEnabled = false;
    ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;


}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);
    modelBuilder.ApplyConfiguration(new TestCenterConfig());

}

public DbSet<TestCenter> PetrolTestCenters { get; set; }

}

公共类PetrolTestCenterDbContext:DbContext
{
公共PetrolTestCenterDbContext（DbContextOptions选项）：基本（选项）
{
ChangeTracker.LazyLoadingEnabled=false；
ChangeTracker.QueryTrackingBehavior=QueryTrackingBehavior.NotTracking；
}
模型创建时受保护的覆盖无效（ModelBuilder ModelBuilder）
{
基于模型创建（modelBuilder）；
ApplyConfiguration（新的TestCenterConfig（））；
}
公共数据库集PetrolTestCenter{get；set；}
}

---

添加“禁用跟踪”后，我收到了相同的错误。

如何调用方法？因为如果在调用

GetById

之后调用

Add

方法，就会出现此错误。您不需要将对象添加回上下文，因为通过第一次拖动它，EF已经通过其主键跟踪此对象。您如何调用方法？因为如果在调用

GetById

之后调用

Add

方法，就会出现此错误。您不需要将对象添加回上下文，因为通过第一次拖动对象，EF已经通过其主键跟踪该对象。