Question

我们正面临着EF的问题。当延迟加载，有时时，导航属性将返回null。

注意：我在db上下文中创建了this.Configuration.LazyLoadingEnabled = true;

型号：

public class Student
{
    public Int64 Id { get; set; }
    public string Name { get; set; }
    public string Gender { get; set; }

    public Int64 Address_Id { get; set; }

    [ForeignKey("Address_Id")]
    public virtual Address Address { get; set; }
}

public class Address
{
    public Int64 Id { get; set; }
    public string Name { get; set; }
}

数据库访问：

Student oStudnet = context.Students.FirstOrDefault();
Int64 addressId= oStudnet.Address.Id

＆＃34; null exception＆＃34; on＆＃34; oStudnet.Address.id＆＃34; //这里的地址为空

Answer 1

Student oStudnet = context.Students.Include("Address").FirstOrDefault();

然后你可以访问地址

EF Lazy加载返回null

1 个答案: