未复制引用的项目依赖项 DLL [英] Referenced project dependencies DLL are not being copied

问题描述

我的项目解决方案目前有三个项目:

My project solution is currently having three projects:

1. MyProject，这是我的主要启动项目(使用 .NET Framework 4.7)- WPF，UI 规范，
2. MyProject.Core - 类库 (.NET Standard 2.0) - 保存模型和所有幕后"数据
3. MyProject.Relational - 类库 (.NET Standard 2.0) - 负责处理和保存数据库特定信息

1. MyProject, which is my main startup project (using .NET Framework 4.7) - WPF, UI specfic,
2. MyProject.Core - class library (.NET Standard 2.0) - holding the models, and all of the 'behind the scenes' data
3. MyProject.Relational - class library (.NET Standard 2.0) - responsible for processing and saving the database specific informations

Project 1 (main) 已经设置了对项目 2 和 3 的引用.

Project 1 (main) has set a reference to project 2 and 3.

对于项目 3 我已经安装了 Microsoft.EntityFrameworkCore.Sqlite (2.0.3) 的 NuGet 依赖项.

For the project 3 I have installed a NuGet dependency of Microsoft.EntityFrameworkCore.Sqlite (2.0.3).

现在，当我最终想使用项目 3 并调用它的方法时，抛出以下异常:

Now, when I finally want to make use of project 3 and call it's method, the following exception is being thrown:

System.IO.FileNotFoundException: 'Could not load file or assembly 'Microsoft.EntityFrameworkCore, Version=2.0.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' or one of its dependencies. The system cannot find the file specified.

这当然是一个缺失的 DLL 文件 - 没有实体框架 DLL 被复制到应用程序 Debug 目录中.

This, of course is a missing DLL file - no entity framework DLL's are being copied to the app Debug directory.

这是为什么?这是预期的行为吗?我是否还必须为项目 1 安装 Microsoft.EntityFrameworkCore.Sqlite 的依赖项?对我来说毫无意义，引用相同的依赖项到没有使用它的项目.

Why is that? Is this intended behaviour? Do I have to install the dependency of Microsoft.EntityFrameworkCore.Sqlite for project 1 as well? Pretty pointless to me, referencing the same dependency to project that is making no use of it.

我尝试了什么:

• 清理项目，删除 bin/obj 目录，
• 设置项目引用属性设置copy local为True,
• 此问题中给出的解决方案:引用的 DLL 未复制到引用项目

使用 Visual Studio 2017.

Using Visual Studio 2017.

推荐答案

通过在我的 .csproj 文件中添加以下行解决了这个问题:

Solved this by adding the following line into my .csproj file:

<RestoreProjectStyle>PackageReference</RestoreProjectStyle>

特别是 PropertyGroup 组.

不知道为什么会产生如此大的差异，如果有人可以在评论中解释和发布，那就太好了.我将添加到此答案中的任何其他信息.

Not sure why it makes such difference, if anyone could explain and post in the comment it would be great. Any additional informations I will add to this answer.

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