blocks|key|107783|text|我错了，这不是IoC和DbContext的问题。看起来像是在.NET平台本身|type|unstyled|depth|inlineStyleRanges|entityRanges|data|107784|https://github.com/dotnet/corefx/issues/9846#issuecomment-274707732|offset|length|107785|添加重定向确实起到了作用|107786|++<dependentAssembly>
++++<assemblyIdentity+name="System.ComponentModel.TypeConverter"+publicKeyToken="b03f5f7f11d50a3a"+culture="neutral"+/>
++++<bindingRedirect+oldVersion="0.0.0.0-4.0.1.0"+newVersion="4.0.0.0"+/>
++</dependentAssembly>|code-block|syntax|javascript|107787|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1V|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Z|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|C]]]]

I was wrong about the issue, it wasn't an IoC and DbContext issue. Seems like it was in the .NET platform itself

<a href="https://github.com/dotnet/corefx/issues/9846#issuecomment-274707732" rel="nofollow noreferrer">https://github.com/dotnet/corefx/issues/9846#issuecomment-274707732</a>

Adding a redirect did the trick

<pre><code> &lt;dependentAssembly&gt;
 &lt;assemblyIdentity name="System.ComponentModel.TypeConverter" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" /&gt;
 &lt;bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.0.0" /&gt;
 &lt;/dependentAssembly&gt;
</code></pre>

blocks|key|107789|text|安装System.Net.Http+4.3.1解决了我的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|107790|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

installing System.Net.Http 4.3.1 solved my problem

blocks|key|105144|text|我遇到了类似的问题，经过多次的反复，下面的代码对我来说是有效的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|105145|DbContext|offset|length|style|BOLD|105146|+public+class+SalesDbContext+:+DbContext
{
++++public+SalesDbContext(DbContextOptions<SalesDbContext>+options)+:+base(options)
++++{
++++}

++++public+DbSet<Domain.Product.Product>+Products+{+get;+set;+}


++++protected+override+void+OnModelCreating(ModelBuilder+builder)
++++{
++++++++//+Configure+database+attributes
++++}



}|code-block|syntax|javascript|105147|存储库|105148|+public+class+ProductRepository+:+IProductRepository
{
++++private+readonly+SalesDbContext+_db;

++++public+ProductRepository(SalesDbContext+db)
++++{
++++++++_db+=+db;
++++}


}|105149|Autofac模块|105150|+public+class+DefaultModule+:+Module
{
++++protected+override+void+Load(ContainerBuilder+builder)
++++{
++++++++//+Register+Entity+Framework
++++++++var+dbContextOptionsBuilder+=+new+DbContextOptionsBuilder<SalesDbContext>().UseSqlServer("MyConnectionString");

++++++++builder.RegisterType<SalesDbContext>()
++++++++++++.WithParameter("options",+dbContextOptionsBuilder.Options)
++++++++++++.InstancePerLifetimeScope();+

++++}
}|105151|entityMap^0|0|0|9|0|0|0|3|0|0|0|9|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|11|8|@$D|12|E|13|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|15|8|@$D|16|E|17|F|G]]|9|@]|A|$]]|$1|S|3|T|5|J|7|18|8|@]|9|@]|A|$K|L]]|$1|U|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|V|$]]

I was having a similar issue and after a lot of back and forth the following code worked for me:

DbContext

<pre><code> public class SalesDbContext : DbContext
{
 public SalesDbContext(DbContextOptions&lt;SalesDbContext&gt; options) : base(options)
 {
 }

 public DbSet&lt;Domain.Product.Product&gt; Products { get; set; }


 protected override void OnModelCreating(ModelBuilder builder)
 {
 // Configure database attributes
 }



}
</code></pre>

Repository

<pre><code> public class ProductRepository : IProductRepository
{
 private readonly SalesDbContext _db;

 public ProductRepository(SalesDbContext db)
 {
 _db = db;
 }


}
</code></pre>

Autofac Module

<pre><code> public class DefaultModule : Module
{
 protected override void Load(ContainerBuilder builder)
 {
 // Register Entity Framework
 var dbContextOptionsBuilder = new DbContextOptionsBuilder&lt;SalesDbContext&gt;().UseSqlServer("MyConnectionString");

 builder.RegisterType&lt;SalesDbContext&gt;()
 .WithParameter("options", dbContextOptionsBuilder.Options)
 .InstancePerLifetimeScope(); 

 }
}
</code></pre>

Most of the examples online deal with asp.net and register their DbContext as part of their startup service registry.

I tried registering my DbContext like this

<pre><code>builder.RegisterType&lt;MyContext&gt;()
 .As&lt;MyContext&gt;()
 .InstancePerLifetimeScope();

builder.RegisterType&lt;DealRepository&gt;()
 .Keyed&lt;IRepository&lt;Deal&gt;&gt;(FiberModule.Key_DoNotSerialize)
 .As&lt;IRepository&lt;Deal&gt;&gt;()
 .SingleInstance();

builder.RegisterType&lt;CardsDialog&gt;()
 .As&lt;IDialog&lt;object&gt;&gt;()
 .InstancePerDependency();
</code></pre>

But I'm getting this error

<blockquote>
 Inheritance security rules violated by type:
 'System.Net.Http.WebRequestHandler'. Derived types must either match
 the security accessibility of the base type or be less accessible.
</blockquote>

It's even more complicated as the actual <code>MessageController.cs</code> creates a new scope on <code>Post</code>

<pre><code>using (var scope = DialogModule.BeginLifetimeScope(Conversation.Container, activity))
{
 var dialog = scope.Resolve&lt;IDialog&lt;object&gt;&gt;();

 await Conversation.SendAsync(activity, () =&gt; dialog);

}
</code></pre>

How should the registering be done?

EDIT:
As suggested, using <code>InstancePerRequest</code> solved the problem. But I also have a Quartz jobs that runs every X seconds that also needs a repository.

<pre><code>builder.RegisterType&lt;DealJob&gt;()
 .AsSelf()
 .SingleInstance();
</code></pre>

<blockquote>
 Unable to resolve the type 'BargainBot.Repositories.MyContext' because
 the lifetime scope it belongs in can't be located. The following
 services are exposed by this registration:
 - BargainBot.Repositories.MyContext
 
 Details ---> No scope with a tag matching 'AutofacWebRequest' is
 visible from the scope in which the instance was requested. If you see this during execution of a web application, it generally indicates that a component registered as per-HTTP request is being requested by a SingleInstance()
</blockquote>

Should I resolve a new DbContext manually at this point? Or maybe I should change the my repo's life cycle?

Edit2: Looks like I'm still getting this error even when removing the entire Quartz job registration.

How to inject EntityFramework Core DbContext in Repository

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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大多数在线示例都与asp.net打交道，并将其DbContext注册为其启动服务注册表的一部分。我尝试这样注册我的DbContextbuilder.RegisterType<MyContext>() .As<MyContext>() .InstancePerLifetimeScope();builder.R...

问如何在存储库中注入EntityFramework核心DbContext
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