解决Entity Framework Code First 的问题——Model compatibility cannot be checked because the database does n...

这两天在虚拟机里重新学习了一下ASP.NET MVC,然后就在Codeplex网站里面找到MVCMusicStore的代码进行研究,跟着它的代码一步一步学习下去。结果在使用EF的时候映射数据的时候,出现了下面的问题。如图:

解决Entity Framework Code First 的问题——Model compatibility cannot be checked because the database does n..._第1张图片

错误的提示为:Model compatibility cannot be checked because the database does not contain model metadata.Model compatibility can only be checked for databases created using Code First or Code First Migrations.

解决方法:

USE [master]
GO

/****** Object: Database [DBname] ******/
 ALTER DATABASE [DBname] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
 ALTER DATABASE [DBname] SET SINGLE_USER WITH NO_WAIT
 DROP DATABASE [DBname]
 GO

DBname 即为你的数据库名称,执行完上面的这段Sql语句,上面出现的问题就解决了。

 

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