Question

我在MVC 3应用程序中使用Entity framework 4.1。我有一个实体，我有主键由两列（复合键）组成。并且这在另一个实体中用作外键。但部分关键需要在多个导航属性中使用。我如何创建关系？我没有运气就试过以下内容，因为您似乎无法在外键注释中指定多个导航属性：

public class Employee
{
    [Key, Column(Order = 0), MaxLength(40)]
    public string Id { get; set; }
    [Key, Column(Order = 1)]
    public int Company { get; set; }

    [ForeignKey("CompanyId")]
    public Company Company { get; set; }
}

public class Event
{
    [Key, Column(Order = 0), MaxLength(40)]
    public string EventReference { get; set; }
    [Key, ForeignKey("AssignedEmployee, Organiser"), Column(Order = 1)]
    public int CompanyId { get; set; }

    public Employee AssignedEmployee { get; set; }

    [ForeignKey("AssignedEmployee"), Column(Order = 0)]
    public string EmployeeId { get; set; }

    [ForeignKey("CompanyId")]
    public Company Company { get; set; }

    public Person Organiser { get; set; }

    [ForeignKey("Organiser"), Column(Order = 0)]
    public string OrganiserId { get; set; }
}

如果使用数据注释无法做到这一点，任何人都可以了解如何在代码中进行操作吗？

如何创建复合键的外键引用？

0 个答案: