Question

在我的Azure Function v2项目中的Startup.cs上：

using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
using MyCompany.MyLib.Contracts; //namespace from external library

[assembly: FunctionsStartup(typeof(Startup))]
namespace Test
{
    public class Startup : FunctionsStartup
    {
       public override void Configure(IFunctionsHostBuilder builder)
      {            
        builder.Services.AddTransient(typeof(Logging.ILogger<>), typeof(Logging.Logger<>));
        builder.Services.AddTransient<IUserLogic, UserLogic>();
        builder.Services.AddTransient<IBillingLogic, BillingLogic>(); //---> loads up from above referenced "MyCompany.MyLib.Contracts" namespace and this namespace is from externally referenced class library but with in same solution
    }
}

}

上面的代码在功能应用程序项目中具有我自己的自定义类，例如“ EmailLogic”，“ Logger”。

但是，当我从外部C＃库项目中将自定义类添加到服务容器（如“ BillingLogic”）时，该类从现有Visual Studio解决方案中添加为参考项目，因此出现以下问题：

“ 启动操作'945918c0-af3a-4d50-ab1d-ac405d4f1c7b'期间发生主机错误。[2/3/2020 2:11:02 PM] MyFunction.FunctionApp：无法加载文件或程序集' MyCompany.MyLib.Contracts ，版本= 1.0.0.0，区域性=中性，PublicKeyToken =空'。找不到或加载特定文件（HRESULT的异常：0x80131621）。System.Private。 CoreLib：无法加载文件或程序集” MyCompany.MyLib.Contracts ，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = null ”

如果“参考的外部项目”中的这些行被删除，

using MyCompany.MyLib.Contracts;
builder.Services.AddTransient<IBillingLogic, BillingLogic>();

startup.cs可以正常工作，但是对于我的解决方案，必须从引用的项目中引用此外部类。

我的Azure函数csproj文件：

     <Project Sdk="Microsoft.NET.Sdk">
      <PropertyGroup>
        <TargetFramework>netstandard2.0</TargetFramework>
        <AzureFunctionsVersion>v2</AzureFunctionsVersion>
        <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
        <AutoGenerateBindingRedirects>false</AutoGenerateBindingRedirects>
      </PropertyGroup>
      <ItemGroup>
        <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.0.0" />
        <PackageReference Include="Microsoft.Azure.Storage.Queue" Version="11.1.2" />
        <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.Storage" Version="3.0.8" />
        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.2.0" />
        <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="1.0.29" />
        <PackageReference Include="NLog" Version="4.6.8" />
        <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
        <PackageReference Include="NLog.Extensions.AzureStorage" Version="1.1.4" />
        <PackageReference Include="Microsoft.Azure.DocumentDB.Core" Version="2.9.2" />

      </ItemGroup>
      <ItemGroup>
        <ProjectReference Include="..\MyCSharpLib.DataStore\MyCSharpLib.DataStore.csproj">
          <Private>true</Private>
        </ProjectReference>
      </ItemGroup>
      <ItemGroup>
        <None Update="appsettings.json">
          <CopyToOutputDirectory>Always</CopyToOutputDirectory>
          <CopyToPublishDirectory>Always</CopyToPublishDirectory>
        </None>
        <None Update="host.json">
          <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
        </None>
        <None Update="local.settings.json">
          <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
          <CopyToPublishDirectory>Never</CopyToPublishDirectory>
        </None>
        <None Update="nlog.config">
          <CopyToOutputDirectory>Always</CopyToOutputDirectory>
          <CopyToPublishDirectory>Always</CopyToPublishDirectory>
        </None>
      </ItemGroup>
    </Project>

MyCSharpLib.DataStore.csproj文件：

      <PropertyGroup>
        <TargetFramework>netstandard2.0</TargetFramework>
        <RuntimeIdentifier>win7-x64</RuntimeIdentifier>
        <Platforms>x64</Platforms>
      </PropertyGroup>

      <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />

      <ItemGroup>
        <PackageReference Include="Microsoft.Azure.Cosmos.Table" Version="1.0.6" />
        <PackageReference Include="Microsoft.Azure.DocumentDB.Core" Version="2.9.2" />
        <PackageReference Include="Microsoft.Azure.Storage.Blob" Version="11.1.1" />
        <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
        <PackageReference Include="Newtonsoft.Json.Bson" Version="1.0.1" />
        <PackageReference Include="Polly" Version="5.3.1" />
        <PackageReference Include="StackExchange.Redis" Version="1.2.6" />
      </ItemGroup>

      <ItemGroup>
        <ProjectReference Include="..\MyContractLib.Contracts\MyContractLib.Contracts.csproj" />          
      </ItemGroup>

    </Project>

Answer 1

MyCSharpLib.DataStore

.\MyContractLib.Contracts\MyContractLib.Contracts.csproj

我的Azure函数csproj文件：

<ProjectReference Include="..\MyCSharpLib.DataStore\MyCSharpLib.DataStore.csproj">

如此

using MyCompany.MyLib.Contracts;

正在通过对DataStore的引用，然后对MyContractLib.Contracts进行引用

但是它并不能解决dll的愚蠢问题，因此请获取Azure函数csproj来引用MyLib。或这样做 How to set dependencies when I use .NET Standard 2.0 DLL libraries with a .NET Framework console application?

在所有标准库中添加

<RestoreProjectStyle>PackageReference</RestoreProjectStyle>

两个标准库都这样

<PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <RestoreProjectStyle>PackageReference</RestoreProjectStyle>
</PropertyGroup>

如果这不起作用，我将删除

.NET Azure函数-依赖注入问题

1 个答案: