这是我的背景:
public class ContentContext : DbContext
{
public ContentContext() : base("Name=CodeFirstDatabase") { }
public DbSet<Article> Articles;
public DbSet<ArticleTag> ArticleTags;
}
连接字符串:
<add name="CodeFirstDatabase" providerName="System.Data.SqlClient" connectionString="Server=X-ПК\SQLEXPRESS;Database=Products;Trusted_Connection=true;"/>
全球.asax:
Database.SetInitializer(new CreateDatabaseIfNotExists<ContentContext>());
家庭控制器:
public ActionResult Index()
{
ContentContext context = new ContentContext();
context.Database.Initialize(true);
Article a = new Article() { Text = "TEXT" };
context.Articles.Add(a);
context.SaveChanges();
return View();
}
实体:
public class Article
{
public int Id { get; set; }
public string Author { get; set; }
public string Text { get; set; }
public virtual ICollection<ArticleTag> ArticleTags { get; set; }
}
public class ArticleTag
{
public int Id { get; set; }
public string Name { get; set; }
public virtual Article Article { get; set; }
}
数据库按预期创建。但没有在其中创建表,当我尝试添加新文章时出现空引用异常。有任何想法吗?谢谢。