您的启动项目' project‘没有引用Microsoft.EntityFrameworkCore.Design
您的启动项目' project‘没有引用Microsoft.EntityFrameworkCore.Design
提问于 2019-02-21 13:34:09
我正在使用EntityFrameworkCore版本2.2.2构建WPF应用程序
然而，当我想要Add-Migration它输出一个错误...
Your startup project 'project' doesn't reference Microsoft.EntityFrameworkCore.Design. This package is required for the Entity Framework Core Tools to work. Ensure your startup project is correct, install the package, and try again.
我不知道为什么会发生这种情况，因为我可以在这个错误出现之前使用它。
这是我的packages.config文件
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="Costura.Fody" version="3.3.2" targetFramework="net461" />
<package id="Fody" version="4.0.2" targetFramework="net461" developmentDependency="true" />
<package id="Microsoft.CSharp" version="4.5.0" targetFramework="net461" />
<package id="Microsoft.Data.Sqlite.Core" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.DotNet.PlatformAbstractions" version="2.1.0" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Abstractions" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Analyzers" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Design" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Relational" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Sqlite" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Sqlite.Core" version="2.2.2" targetFramework="net461" />
<package id="Microsoft.EntityFrameworkCore.Tools" version="2.2.2" targetFramework="net461" developmentDependency="true" />
<package id="Microsoft.Extensions.Caching.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Caching.Memory" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Configuration" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Configuration.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Configuration.Binder" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.DependencyInjection" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.DependencyInjection.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.DependencyModel" version="2.1.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Logging" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Logging.Abstractions" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Options" version="2.2.0" targetFramework="net461" />
<package id="Microsoft.Extensions.Primitives" version="2.2.0" targetFramework="net461" />
<package id="Newtonsoft.Json" version="9.0.1" targetFramework="net461" />
<package id="Remotion.Linq" version="2.2.0" targetFramework="net461" />
<package id="SQLitePCLRaw.bundle_green" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.core" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.lib.e_sqlite3.linux" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.lib.e_sqlite3.osx" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.lib.e_sqlite3.v110_xp" version="1.1.12" targetFramework="net461" />
<package id="SQLitePCLRaw.provider.e_sqlite3.net45" version="1.1.12" targetFramework="net461" />
<package id="System.Buffers" version="4.4.0" targetFramework="net461" />
<package id="System.Collections.Immutable" version="1.5.0" targetFramework="net461" />
<package id="System.ComponentModel.Annotations" version="4.5.0" targetFramework="net461" />
<package id="System.Diagnostics.DiagnosticSource" version="4.5.0" targetFramework="net461" />
<package id="System.Interactive.Async" version="3.2.0" targetFramework="net461" />
<package id="System.Memory" version="4.5.1" targetFramework="net461" />
<package id="System.Numerics.Vectors" version="4.4.0" targetFramework="net461" />
<package id="System.Runtime.CompilerServices.Unsafe" version="4.5.1" targetFramework="net461" />
<package id="System.Runtime.InteropServices.RuntimeInformation" version="4.0.0" targetFramework="net461" />
</packages>程序包已安装。
非常感谢你的帮助。
回答 3
Stack Overflow用户
发布于 2019-03-28 07:19:11
Add-Migration可能会感到困惑，因为您正在使用Costura嵌入程序集。尝试删除costura，看看这是否解决了问题。
Stack Overflow用户
发布于 2020-02-02 06:47:49
我确实使用这个命令安装了它，并且它工作了！
我使用的是.net核心版本3.1.1
dotnet add package Microsoft.EntityFrameworkCore.Design --version 3.1.1Stack Overflow用户
发布于 2020-03-26 05:04:20
使用PMC再次安装它，然后它将找到引用：
PM> dotnet add package Microsoft.EntityFrameworkCore.Design页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/54799905
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