Question

我在控制器中有代码，可以将数据从View写入表

这是代码

[HttpGet]
    public ActionResult WelcomeScreen()
    {
        // Формируем список команд для передачи в представление
        SelectList teams = new SelectList(db.Vacancy, "VacancyId", "VacancyName");
        ViewBag.Teams = teams;
        SelectList teams2 = new SelectList(db.Companies, "CompanyID", "CompanyName");
        ViewBag.Teams2 = teams2;
        return View();
    }


    [HttpPost]
    public ActionResult WelcomeScreen(Interview interview)
    {
        db.Interview.Add(interview);
        db.SaveChanges();
        int id = interview.Interview_Id;
        return RedirectToAction("Index", "Questions");
    }

这是模型

   [Key]
    public int Interview_Id { get; set; }
    public string Greeting { get; set; }
    public string Detail { get; set; }
    public Nullable<int> VacancyId { get; set; }

    public virtual Vacancy Vacancy { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<Interwier> Interwiers { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<InvitationMail> InvitationMails { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<MassLink> MassLinks { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<QuestionBlock> QuestionBlocks { get; set; }
}

我需要Interview_Id

我尝试这样做，但它不起作用int id = interview.Interview_Id;

如何将id写入变量？

Answer 1

如果我理解你的问题是对的。你可能会有这样的事情。

public DbSet<Interview> Interviews {get; set;}

将Interview_Id重命名为Id或InterviewId（无下划线）。

public class Interview
{
 [Key]
 [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
 public int InterviewId { get; set;}
 // other properties 
 }

DAL方法。

public int Add(Interview inteview)
{
     using(DbContext entities = new DbContext()
     {
         entities.Interviews.Add(interview);
         entities.SaveChanges();
         var id = interview.InterviewId; 

        return id;
     }

}

来自您的控制器。

[HttpPost]
public ActionResult WelcomeScreen(Interview interview)
{
   Dal dalObj = new Dal();
   var inteviewId = dal.Add(interview);
   //use this id
}

希望这有帮助。

Answer 2

你可以试试这个。

  [HttpPost]
        public ActionResult WelcomeScreen(Interview interview)
        {
            db.Interview.Add(interview);
            db.SaveChanges();
            int id = db.Interview.Max(x=>x.Interview_Id);
            return RedirectToAction("Index", "Questions");
        }

Answer 3

检查你的dbml 确保正确设置此属性

AutoSync=AutoSync.OnInsert

完整属性通常像这样

[global::System.Data.Linq.Mapping.ColumnAttribute(Storage="_ID", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true, UpdateCheck=UpdateCheck.Never)]

获取插入数据的ID（ASP.NET）

3 个答案: