無法添加方法OnModelCreating

Question

此代碼

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Data.Entity; 
using System.Data.Entity.ModelConfiguration; 


    namespace ArticleLibrary_.NET.Models 
    { 
     public class ArticleLibraryEntitiy : DbContext 
     { 
      public DbSet<Post> Posts { get; set; } 
      public DbSet<Person> People { get; set; } 
      public DbSet<Tag> Tags { get; set; } 
     } 

     protected override void OnModelCreating(ModelBuilder modelBuilder) 
     { 

     } 

    } 

給出了一個錯誤說：

Expected class, delegate, enum, interface, or struct 

符合

protected override void OnModelCreating(ModelBuilder modelBuilder) 

，也似乎ModelBuilder不受VS代碼編輯器的認可

我是否需要添加其他參考？

Answer 1

你必須編寫OnModelCreating函數在的類。你寫下它。將您的代碼更改爲：

namespace ArticleLibrary_.NET.Models 
{ 
    public class ArticleLibraryEntitiy : DbContext 
    { 
     public DbSet<Post> Posts { get; set; } 
     public DbSet<Person> People { get; set; } 
     public DbSet<Tag> Tags { get; set; } 

     protected override void OnModelCreating(ModelBuilder modelBuilder) 
     { 

     } 
    } 

}