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我有這些類描述我的DB模式:ADO.NET EF如何設置FK與代碼首先
public class Blog
{
public int BlogId { get; set; }
public string Name { get; set; }
public string Url { get; set; }
public virtual List<Post> Posts { get; set; }
}
public class Post
{
public int PostId { get; set; }
public string Title { get; set; }
public string Content { get; set; }
public int BlogId { get; set; }
public virtual Blog Blog { get; set; }
}
public class User
{
public int UserId { get; set; }
public string Username { get; set; }
public string DisplayName { get; set; }
}
public class BloggingContext : DbContext
{
public DbSet<Blog> Blogs { get; set; }
public DbSet<Post> Posts { get; set; }
public DbSet<User> Users { get; set; }
}
它的工作很好,但是當我嘗試添加FK約束在App.Config
這樣的:
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework">
<parameters>
<parameter value="System.Data.SqlClient" />
</parameters>
</defaultConnectionFactory>
<Association Name="UserBlogs">
<End Type="CodeFirstNewDatabaseSample.BloggingContext.User" Role="User" Multiplicity="1" >
<OnDelete Action="Cascade" />
</End>
<End Type="CodeFirstNewDatabaseSample.BloggingContext.Blog" Role="Blog" Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="User">
<PropertyRef Name="UserId" />
</Principal>
<Dependent Role="Blog">
<PropertyRef Name="UserId" />
</Dependent>
</ReferentialConstraint>
</Association>
</entityFramework>
我收到一個錯誤App.Config has threw an error
。如何添加FKeys使用此代碼作爲示例,並且App.Config
是否正確嗎?
謝謝,非常有用的閱讀。 – Leron 2013-02-14 09:37:33
很高興幫助:) – 2013-02-14 09:54:11