C# 财产'；部门ID'；无法配置为导航属性_C#_Asp.net Mvc_Entity Framework_Code First_Foreign Key Relationship

C# 财产'；部门ID'；无法配置为导航属性

c# asp.net-mvc entity-framework

C# 财产'；部门ID'；无法配置为导航属性,c#,asp.net-mvc,entity-framework,code-first,foreign-key-relationship,C#,Asp.net Mvc,Entity Framework,Code First,Foreign Key Relationship,指定类别 public class Designation { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] [Key] public int id { get; set; } [DatabaseGenerated(DatabaseGeneratedOption.Identity)] [ForeignKey("DepartmentID")] public int Departme

指定类别

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; }
}

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; }
}

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; }
}

系级

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; }
}

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; }
}

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; }
}

性别枚举

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

在

公共虚拟部门{get；set；}

属性上使用

[ForeignKey（“DepartmentID”）]

，而不是

部门id

属性。因此，

DepartmentID

将被标识为关联的

部门的外键
即使您不需要设置ForeignKey属性，因为您已经将DepartmentID
名称设置为与Department关联的对象属性相同，默认约定EF将DepartmentID
设置为外键
见下面的代码，你会有一个清晰的图片
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; }
}

我想按departmentID与三个模型/表建立外键关系，但错误显示如下>无法将属性“departmentID”配置为导航属性。该属性必须是有效的实体类型，并且该属性应该具有非抽象的getter和setter。对于集合属性，类型必须实现ICollection，其中T是有效的实体类型my model is您不应该在注释中写问题。请尝试编辑您的问题并在此处写入详细信息从public int DepartmentID{get；set；}
中删除[ForeignKey（“DepartmentID”）]
（如果需要，需要将其应用于公共虚拟部门{get；set；}
属性（但不在您的情况下）。您还需要删除[DatabaseGenerated（DatabaseGeneratedOption.Identity）]
也从中生成。