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

我发布这个问题只是为了防止我找到的解决方案可以帮助其他人.在 Visual Studio 2017 rc4 中工作时，每次我尝试在包管理器控制台中运行 Add-Migration 命令时，我都会收到以下错误:

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:

无法识别术语添加迁移"...

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

推荐答案

在尝试了大量其他已发布的解决方案后，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 Manage Nuget Packages
• 选择浏览标签
• 厚包括预发布复选框
• 安装Microsoft.EntityFrameworkCore.Tools

注意，visual studio 2017 中的 aspnetcore 项目似乎没有 project.json 文件.

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