术语“添加迁移”无法识别

本文介绍了术语“添加迁移”无法识别-VS2017和EntityFrameworkCore的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我发布这个问题是为了以防我发现解决方案可以帮助其他人。每次在 Visual Studio 2017 rc4 中工作时，每次尝试在程序包管理器控制台中运行 Add-Migration 命令时，出现以下错误：

I am posting this question just in case the solution I found would help someone else out. While working in Visual Studio 2017 rc4 each time I tried to run the Add-Migration command in the Package Manager console I get the following error:

术语添加迁移无法识别...

The term 'Add-migration' is not recognized...

推荐答案

在尝试了一系列其他解决方案后，对我有用的解决方案是：

The solution that worked for me after trying a whole raft of other solutions posted, was to:

• 右键单击我的项目
• 选择管理Nuget软件包
• 选择浏览选项卡
• 浓密包括预发行版本复选框
• 安装 Microsoft.EntityFrameworkCore.Tools

• right click on my project
• select Manage Nuget Packages
• select the browse tab
• thick Include prerelease check box
• install the Microsoft.EntityFrameworkCore.Tools

aspnetcore项目所在的Nb Visual Studio 2017似乎没有 project.json 文件。

N.b that aspnetcore project in visual studio 2017 do not seem to have the project.json file.