속성 'DepartmentID은'탐색 속성으로

Question

지정 클래스

public class Designation 
{ 
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    [Key] 
    public int id { get; set; } 

    [DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    [ForeignKey("DepartmentID")] 
    public int DepartmentID { get; set; } 



    public bool IsActive { get; set; } 

    public string AddedBy { get; set; } 

    public DateTime AddedDate { get; set; } 
    public string UpdateBy { get; set; } 

    public DateTime UpdateDate { get; set; } 
    public virtual Department Department { get; set; } 
} 

부서 클래스

public class Department 
{ 
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    [Key] 
    public int DepartmentID { get; set; } 
    public string DepartmentName { get; set; } 

    public bool IsActive { get; set; } 

    public string AddedBy { get; set; } 

    public DateTime AddedDate { get; set; } 
    public string UpdateBy { get; set; } 

    public DateTime UpdateDate { get; set; } 
    public virtual ICollection<Designation> Designations { get; set; } 
} 

EmployeeInfo 클래스

public class EmployeeInfo 
{ 
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    [Key] 
    public int EmployeeID { get; set; } 
    public int DepartmentID { get; set; } 
    [ForeignKey("DepartmentID")] 
    public virtual Department Department { get; set; } 
    [Required(ErrorMessage = "Employee Name is Required"), Display(Name = "Name")] 
    public string EmployeeName { get; set; } 
    [Required(ErrorMessage = "Employee Bangla Name is Required"), Display(Name = "Bangla Name")] 
    public string EmployeeBanglaName { get; set; } 
    [Required(ErrorMessage = "Department Name is Required")] 
    public string Department { get; set; } 
    [Required(ErrorMessage = "Designation is Required")] 
    public string Designation { get; set; } 
    [DataType(DataType.Date)] 
    [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)] 
    public DateTime JoiningDate{ get; set; } 

    [DataType(DataType.Date)] 
    [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)] 
    public DateTime DateOfBirth { get; set; } 
    [Required(ErrorMessage = "BloodGroup is Required"), Display(Name = "Blood Group")] 
    public string BloodGroup { get; set; } 
    [Required(ErrorMessage = "Gender is Required")]  
    public gender Gender { get; set; } 
    [Required(ErrorMessage = "Father Name is Required"), Display(Name = "Father Name")] 
    public string FatherName { get; set; } 
    [Required(ErrorMessage = "Mother Name is Required"), Display(Name = "Mother Name")] 
    public string MotherName { get; set; } 
    [Required(ErrorMessage = "Husband/Wife Name is Required"), Display(Name = "Spouse Name")] 
    public string SpouseName { get; set; } 
    public string ChildrenNumber { get; set; } 
    public string CardNumber { get; set; } 
    [Required(ErrorMessage = "Contact No is Required"), DataType(DataType.PhoneNumber)] 
    public string ContactNo { get; set; } 
    [Required(ErrorMessage = "Email is Required"), DataType(DataType.EmailAddress), StringLength(200)] 
    public string Email { get; set; } 

    [Required(ErrorMessage = "HomeContactNo is Required"),DataType(DataType.PhoneNumber)] 
    public string HomeContactNo { get; set; } 
    [Required(ErrorMessage = "District Name is Required")] 
    public string District { get; set; } 
    [Required(ErrorMessage = "Thana is Required")] 
    public string Thana { get; set; } 
    [Required(ErrorMessage = "Village Name is Required")] 
    public string Vill { get; set; } 
    [Required(ErrorMessage = "Post Code is Required")] 
    public string PostCode { get; set; } 
    public string Image { get; set; } 
    public byte[] picture { get; set; } 
    public bool IsActive { get; set; } 

    public string AddedBy { get; set; } 

    public DateTime AddedDate { get; set; } 
    public string UpdateBy { get; set; } 

    public DateTime UpdateDate { get; set; } 
} 

를 구성 할 수 없습니다

성 열거

public enum gender 
{ 
    Male, 
    Female,enter code here 
    Other 
} 

Answer 1

사용 [외래 키 ("DepartmentID")] 공용 가상 부서 부서에 {얻을; 세트; } 속성 대신 DepartmentID 속성을 사용하십시오. 따라서 DepartmentID는 Associated Department의 외래 키로 식별됩니다.

DepartmentID 이름을 부서 관련 개체 속성과 동일하게 설정 했으므로 ForeignKey 특성을 설정하지 않아도 기본적으로 EF는 DepartmentID를 외부 키로 설정합니다.

아래 코드를 참조하십시오. 분명히 알 수 있습니다.

public class Designation 
{ 
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    [Key] 
    public int id { get; set; } 

    [DatabaseGenerated(DatabaseGeneratedOption.Identity)] 

    public int DepartmentID { get; set; } 

    public bool IsActive { get; set; } 

    public string AddedBy { get; set; } 

    public DateTime AddedDate { get; set; } 
    public string UpdateBy { get; set; } 

    public DateTime UpdateDate { get; set; } 
    [ForeignKey("DepartmentID")] 
    public virtual Department Department { get; set; } 
}