DOTNET核心配置方法之间的调用不明确

Question

获取错误

  

以下方法或属性之间的调用不明确：'Microsoft.AspNetCore.Hosting.WebHostBuilderExtensions.UseConfiguration（Microsoft.AspNetCore.Hosting.IWebHostBuilder，Microsoft.Extensions.Configuration.IConfiguration）'和'Microsoft.AspNetCore.Hosting。 HostingAbstractionsWebHostBuilderExtensions.UseConfiguration

在.UseConfiguration(ConfigurationRoot)行

我的方法

var builder = new ConfigurationBuilder()
    .AddJsonFile($"appsettings-{Environment.GetEnvironmentVariable("azure")}.json")
    .AddEnvironmentVariables()
    .AddCommandLine(args);

ConfigurationRoot = builder.Build();

var application = new WebHostBuilder()
  .UseConfiguration(ConfigurationRoot)
  .UseIISIntegration()
  .UseServer("Microsoft.AspNetCore.Server.Kestrel")
  .UseStartup<Startup>()
  .Build();
application.Run();

Project.json

{
  "version": "1.0.0-*",
  "description": "Aps.ManageIT.WebAPI",
  "authors": [ "IPPCS" ],
  "commands": {
    "web": "Microsoft.AspNet.Server.Kestrel"
  },
  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true,
    "copyToOutput": {
      "include": [ "wwwroot" ],
      "includeFiles": [
        "appsettings.json",
        "appsettings-dev.json",
        "web.config",
        "appsettings-aps.json",
        "appsettings-adidasdev.json",
        "appsettings-prod.json"
      ]
    },
    "compile": [
      "wwwroot"
    ]
  },
  "publishOptions": {
    "include": [ "wwwroot" ],
    "includeFiles": [
      "appsettings.json",
      "appsettings-dev.json",
      "web.config",
      "appsettings-aps.json",
      "appsettings-adidasdev.json",
      "appsettings-prod.json"
    ]
  },
  "dependencies": {
    "Aps.ManageIT.Repository.MongoDB": "1.0.0-*",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
    "Microsoft.Extensions.DependencyInjection": "1.0.0-rc2-final",
    "Microsoft.Extensions.DependencyInjection.Abstractions": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.CommandLine": "1.0.0-rc2-final",
    "OpenIddict": "1.0.0-alpha2-0288",
    "Microsoft.Extensions.Configuration.Abstractions": "1.0.0-rc2-final",
    "Microsoft.Extensions.Options": "1.0.0-rc2-final",
    "mongocsharpdriver": "2.2.0",
    "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Authentication.JwtBearer": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Identity": "1.0.0-rc2-final",
    "HtmlAgilityPack": "1.4.9.4",
    "Microsoft.AspNet.WebApi.Cors": "5.2.3",
    "Microsoft.Extensions.Configuration.Binder": "1.0.0-rc2-final",
    "Aps.JobIT.Log.Repository.MongoDB": "1.0.0-*",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0-rc2-final",
    "WindowsAzure.Storage": "8.0.1"
  },
  "frameworks": {
    "net452": {}
  },
  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },
  "scripts": {
    "postpublish": "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%"
  }
}

Answer 1

首先，您引用的软件包是旧的预发布软件包。将您的软件包更新为稳定版本。

在1.0.0版本之前，已将此扩展方法从WebHostBuilderExtensions移至.Abstractions进行了更改。您使用的预发布包在两个位置都定义了此扩展，这就是您看到此错误的原因。更新到已发布的（1.0.0+）软件包时应解决此问题。

或者，使用完整的Microsoft.AspNetCore.Hosting.HostingAbstractionsWebHostBuilderExtensions.UseConfiguration(webHostBuilder, configuration)方法，而不是通过扩展方法链接配置方法调用：

var webHostBuilder = new WebHostBuilder();
var application = Microsoft.AspNetCore.Hosting.HostingAbstractionsWebHostBuilderExtensions.UseConfiguration(webHostBuilder, ConfigurationRoot)
  .UseIISIntegration()
  .UseServer("Microsoft.AspNetCore.Server.Kestrel")
  .UseStartup<Startup>()
  .Build();
application.Run();