无法首先在数据库上启用代码迁移，从而导致以下错误 [英] Unable to enable-migrations for code first on a database getting the following error

问题描述

大家好，



我正在使用Code First方法来创建和修改我的数据库。当我在两种情况下尝试在New get packages的包管理控制台上运行Enable-Migrations或Add-Migration CreateInstance时，我收到相同的错误以下错误。任何人都可以帮我解决这个问题。

这是我得到的错误

Hi All,

I am using Code First approach to create and modify my database. When I am trying to run the Enable-Migrations or Add-Migration CreateInstance on Package Management Console of New get packages in both cases I am getting the same error the following error. Can anybody please help me in resolving this issue.
This is the error that I am getting

Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load file or assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' o
r one of its dependencies. The system cannot find the file specified."
At C:\Users\Abdul.Aleem\Desktop\TestWPFApplication\packages\EntityFramework.5.0.0\tools\EntityFramework.psm1:431 char:31
+     $domain.CreateInstanceFrom <<<< (
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : DotNetMethodTargetInvocation

我尝试了什么：



谷歌搜索并尝试使用不同的组合并向朋友展示帮助

What I have tried:

Google Search and trying with different combinations and showing it friends for help

推荐答案

domain.CreateInstanceFrom<<<<（
+ CategoryInfo：NotSpecified：（:) []，MethodInvocationException
+ FullyQualifiedErrorId：DotNetMethodTargetInvocation

domain.CreateInstanceFrom <<<< ( + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : DotNetMethodTargetInvocation

我尝试过：



Google搜索并尝试不同的组合并向朋友展示帮助

What I have tried:

Google Search and trying with different combinations and showing it friends for help

看起来你从某个地方复制了这个项目，但没有复制整个东西。包文件夹似乎缺少所有的包。 />


右键单击解决方案资源管理器中的解决方案行，然后单击恢复器 e NuGet包。这将重新安装任何丢失的软件包。



如果不起作用，请打开软件包管理器控制台并输入：

It would appear that you copied this project from somewhere but didn't copy the whole thing. The packages folder seems to be missing all of the packages.

Right-click the Solution line in the Solution Explorer and click "Restore NuGet packages". That will reinstall any missing packages.

If the doesn't work, open the Package Manager Console and type:

Update-Package

这将安装解决方案中所有软件包的最新版本，包括实体框架到6.1.3。

That will install the latest versions of all the packages in your solution, including Entity Framework to 6.1.3.

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