因此我想出了很多错误，但这是对我有用的解决方案。您无需实例化单个导航属性。这将使其始终为空。如果它是对象的ICollection，则仍然需要实例化Navigation属性。还有其他一些小事情。谢谢您的帮助。
public partial class Submission
{
public int Keytbl { get; set; }
public int Company { get; set; }
public virtual tbl_lst_Company tbl_lst_Company{ get; set; }
}
public partial class tbl_lst_Company
{
public tbl_lst_Company() {
this.Submissions = new List<Submission>();
}
public int CompanyID { get; set; }
public string Company { get; set; }
public virtual ICollection<Submission> Submissions { get; set; }
}
public tbl_lst_CompanyMap()
{
// Primary Key
this.HasKey(t => t.CompanyID);
// Properties
this.Property(t => t.Company)
.Isrequired()
.HasMaxLength(150);
// Table & Column Mappings
this.ToTable("tbl_lst_Company");
this.Property(t => t.CompanyID).HasColumnName("CompanyID");
this.Property(t => t.Company).HasColumnName("Company");
}
public SubmissionMap()
{
// Primary Key
this.HasKey(t => t.Keytbl);
// Table & Column Mappings
this.ToTable("Submissions");
this.Property(t => t.Keytbl).HasColumnName("Keytbl");
this.Property(t => t.Company).HasColumnName("Company");
this.HasOptional(t => t.tbl_lst_Company)
.WithMany(t => t.Submissions)
.HasForeignKey(d => d.Company);
}
[TestMethod]
public void test_lazy_loading() {
using (var db = new SubmissionContext()) {
var subs = (from s in b.Submissions
select s);
var x = subs.First().tbl_lst_Company;
Assert.AreEqual(x, null, "Lazy Loading Failed");
}
}
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