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Code First 启用迁移时出错 "No context type was found in the assembly"

问题:Code First 启用迁移时找不到上下文DbContext所在的项目. PM> Enable-Migrations No context type was found in the assembly 'Road.Web'. 解决方法:PM> Enable-Migrations -ProjectName Road.Data -StartUpProjectName Road.Web -Verbose PM> Enable-Migrations No context type was…

EntityFramework 启用迁移 Enable-Migrations 报异常 "No context type was found in the assembly"

转自:http://www.cnblogs.com/stevenhqq/archive/2013/04/18/3028350.html 以前做项目的时候,没有采用分类库的形式,所以迁移一致非常顺利,没有出现过任何状况. 这次做项目稍微有点大,必须要分类库才方便开发维护. 在解决方案中启用项目EntityFramework迁移时却发生了异常. 异常说在我的项目中没有找到DBContext类. 这个DBContext类确实没有放在启动项目下面,是另外建立了一个独立的类库来存放. 在启动项目中引用了却…

EntityFramework codefirst Enable-Migrations No context type was found in the assembly “MyApp.Web” error

Enable-Migrations -Force -ContextTypeName "MyApp.Repository.DataContext" -ProjectName "MyApp.Repository" -Startup "MyApp.Web" -ConnectionStringName "DataContext" -verbose…

No context type was found in the assembly

如果解决方法中有多个项目存在,记住要在默认项目中选择你需要的项目进行 enable-migrations    add-migration 以及updatebase…

Could not load type 'System.Reflection.AssemblySignatureKeyAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c

错误: Could not load type 'System.Reflection.AssemblySignatureKeyAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c 调试或者在安装了VS2012的电脑上运行没事,但在干净的环境下,就报这个错误. 解决: 查了一下AssemblySignatureKeyAttribute,是.net framework4.…

Type 'Insus.NET.PictureObject' in Assembly 'App_Code, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.

昨晚想实现一个功能,需要把一个对象存储于ViewState中去,但在运行时,出现下面的异常. Type 'Insus.NET.PictureObject' in Assembly 'App_Code, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable. Description: An unhandled exception occurred during the executi…

AddDbContext was called with configuration, but the context type 'NewsContext' only declares a parameterless constructor?

问题 An error occurred while starting the application. ArgumentException: AddDbContext was called with configuration, but the context type 'NewsContext' only declares a parameterless constructor. This means that the configuration passed to AddDbContext…

AddDbContext was called with configuration, but the context type 'MyDBContext' only declares a parameterless constructor

System.ArgumentException HResult=0x80070057 Message=AddDbContext was called with configuration, but the context type 'MyDBContext' only declares a parameterless constructor. This means that the configuration passed to AddDbContext will never be used.…

ASP.NET MVC 4下 Code First 数据库迁移

 一.命令开启 1.打开控制台:视图->其他窗口->程序包管理器控制台: 2.启动数据库迁移,执行命令:enable-migrations 创建成功后会新增migrations目录等. 若报如下错误: PM> Enable-Migrations More than one context type was found in the assembly 'FirstMVC'. To enable migrations for FirstMVC.Models.UsersContext, use…

Code First 更新数据库结构

参考:http://blog.csdn.net/sxycxwb/article/details/12186159 0.删除之前的数据库 1.Run the Enable-Migrations command in Package Manager Console 进入(PM)软件包管理控制台 (视图——>其他窗口——>程序包管理控制台)输入以下指令:Enable-Migrations 会提示:"No context type was found in the assembly"…