除了在 asp.net MVC 中具有实体框架的两个 table 之间

Question

我有三个 table A , B , C;

//Table A
 public class Question
    {
        [Key]
        public int ID { get; set; }

        [Required]        
        public string Name { get; set; }

     }
//Table B
public class Answer
    {
        [Key]
        public int ID { get; set; }

        [Required]        
        public string Name { get; set; }

        [Required]        
        public int QusetionID { get; set; }

        [Required]        
        public int LocalID { get; set; }

     }

//Table C
public class Local
    {
        [Key]
        public int ID { get; set; }

        [Required]        
        public string Name { get; set; }

        [Required]        
        public int Localip { get; set; }
     }

当地人没有回答的问题是什么？你如何使用 except 在两个矩阵中使用？使用 Entity Framework 在 Asp.net MVC 中我想显示未回答的问题列表？

string ip = Request.UserHostAddress;
var answerip = db.Answer.Where(l => l.Local.Localip == ip );
var quslist = db.Qustions.Except(answerip);

Answer 1

List<int> tempIdList = answeripE.Select(q => q.ID).ToList();
var quslist = db.Qustion.Where(q => !tempIdList.Contains(q.ID));

感谢"daryal"的创造者 Get All Except from SQL database using Entity Framework

除了在 asp.net MVC 中具有实体框架的两个 table 之间

Except between two table with entity freamwork in asp.net MVC

asp.net-mvc

except