无法获取DbContext的反射类型 [英] Could not get the reflection type for DbContext

问题描述

在ASP Core 2.0 VS 2017中搭建控制器时，我得到以下信息:

When scaffolding a controller in ASP Core 2.0 VS 2017 I get the following:

无法获取DbContext的反射类型:

Could not get the reflection type for DbContext :

BE.Data.ApplicationDbContext在 Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.b__6_0() 在 Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String [] args)在 Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.Execute(String [] args)在 Microsoft.VisualStudio.Web.CodeGeneration.CodeGenCommand.Execute(String [] args)

BE.Data.ApplicationDbContext at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.b__6_0() at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args) at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.Execute(String[] args) at Microsoft.VisualStudio.Web.CodeGeneration.CodeGenCommand.Execute(String[] args)

这一切突然发生了，运行相同代码的同事没有遇到此问题，我尝试了干净的构建，删除了每个项目中的bin和obj文件夹，删除了db，但我似乎还是无法工作出来，将不胜感激.

This all of a sudden has occurred, and a colleague running the same code does not get this problem, I had tried clean builds, deleting the bin and obj folders in each project, deleting the db and still I cannot seem to work it out, would appreciate any help.

型号:

public class SettingType : BaseModel
{
    public int SettingTypeId { get; set; }
    public string SettingTypeDescription { get; set; }
    public string SystemCode { get; set; }
}

推荐答案

当我使用新的C#7功能(

I had this issue too, when I was using the new C#7 feature (expression bodied members and Throw expressions) but by replacing my code with it's equivalent in C#6 it didn't give me that error anymore. Try to test your project without any C#7 new feature and probably it should works fine. I'm not sure what is the reason but I think The Roslyn packages that scaffolding depends on does not support C#7 new features yet.

作为让脚手架与C#7配合使用的一种变通办法，我认为您可以通过以下操作来实现:

As a workaround to let scaffolding works with C#7 I think you can by doing the following:

1. 安装(或更新)NuGet软件包Microsoft.CodeAnalysis.CSharp.Workspaces 2.0.0或更高版本
2. 然后重试脚手架

1. Install (or update) NuGet package Microsoft.CodeAnalysis.CSharp.Workspaces version 2.0.0 or higher
2. And then retry to scaffolding again

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