Question

我试图在我的Startup.cs中使用以下内容从AppSettings.cs加载一些值。我在之前的项目中使用了相同的方法，没有任何问题。

    public void ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddApplicationInsightsTelemetry(Configuration);

        services.AddMvc();

        services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));
    }

但是我现在收到以下错误：

错误CS0121以下方法或之间的调用不明确特性： Microsoft.Extensions.DependencyInjection.OptionsServiceCollectionExtensions.Configure<TOptions>(Microsoft.Extensions.DependencyInjection.IServiceCollection, Microsoft.Extensions.Configuration.IConfiguration)和 Microsoft.Extensions.DependencyInjection.OptionsConfigurationServiceCollectionExtensions.Configure<TOptions>(Microsoft.Extensions.DependencyInjection.IServiceCollection, Microsoft.Extensions.Configuration.IConfiguration)

看来我有一个重复/不兼容的依赖，但我可以找到它。下面是我的project.json：

{
  "dependencies": {
    "Microsoft.ApplicationInsights.AspNetCore": "1.0.0",
    "Microsoft.AspNet.Mvc.Core": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.ViewFeatures": "6.0.0-rc1-final",
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.1",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Routing": "1.0.1",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "System.Data.SqlClient": "4.1.0",
    "tessitura.nuget": "1.0.0"
  },

  "tools": {
    "BundlerMinifier.Core": "2.0.238",
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },

  "frameworks": {
    "net462": {
      "frameworkAssemblies": {
        "System.Web": "4.0.0.0",
        "System.Web.Services": "4.0.0.0"
      }
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "**/*.cshtml",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install", "dotnet bundle" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

已经查看了一些类似的帖子但尚未找到解决方案。任何人都可以帮忙，因为这让我疯了吗？

由于

修改

尝试评论＆＃34; Microsoft.Extensions.Options.ConfigurationExtensions＆＃34;，这似乎使Visual Studio高兴，但当我尝试运行它时出现以下错误：

Answer 1

冗长但最好和最直接的方法是只注释项目文件的一部分，直到你的代码工作，你知道哪个依赖导致了问题。

不明确的呼叫服务。配置<appsettings>

1 个答案: