Question

我想阅读appsettings.json，然后根据每个环境替换密钥。经过大量研究后，我感到无知，我读了其他类似文章，但所提供的解决方案无济于事，Program.cs的实现在理论上应该可以工作，但应用程序仅使用appsettings.json。

Program.cs

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((hostContext, config) =>
                {

                    config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                        .AddJsonFile($"appsettings.{Environment}.json", optional: true, reloadOnChange: true);
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });

        public static string Environment
        {
            get
            {
                string environmentName;
                #if DEBUG
                environmentName = "Development";
                #elif RELEASE
                environmentName = "Test";
                #endif
                return environmentName;
            }
        }

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "ConnectionStrings": {
    "myconn": "connection"
  }
}

appsettings.Development.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "ConnectionStrings": {
    "myconn": "connectionDev"
  }
}

{
  "ConnectionStrings": {
    "myconn": "connectionDev"
  }
}

launchSettings.json

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:49416/",
      "sslPort": 44368
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "IIS Express Test": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Test"
      }
    },
    "WICAPI": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "applicationUrl": "https://localhost:5001;http://localhost:5000"
    }
  }
}

Answer 1

首先，您需要在launchSettings.json中创建Properties

对于内容，诸如此类。更新关注您的业务。

    {
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iis": {
      "applicationUrl": "http://localhost/test",
      "sslPort": 0
    },
    "iisExpress": {
      "applicationUrl": "http://localhost:51572/",
      "sslPort": 0
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "test.Web.Local": {
      "commandName": "IIS",
      "launchBrowser": true,
      "launchUrl": "http://localhost/test",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "applicationUrl": "http://localhost:51572/"
    },
    "test.Web.Staging": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Staging"
      },
      "applicationUrl": "http://localhost:51572/"
    },
    "test.Web.RC": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "ReleaseCandidate"
      },
      "applicationUrl": "http://localhost:51572/"
    },
    "test.Web.Prod": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Production"
      },
      "applicationUrl": "http://localhost:51572/"
    }
  }
}

您的json文件

在启动文件中，您可以使用

services.Configure（Configuration.GetSection（“ ApplicationSettings”））;
运行调试时，选择要运行的env

希望能为您提供帮助。

Answer 2

ASP.NET Core实际上为您做到了。不需要做任何事情。将function addName(obj, name, value) { return {...obj, [name]: value} } addName({}, "Brutus", 300)保留为默认值：

Program.cs

常规配置必须位于public static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); });上，只需在appsettings.json文件中写入要从appsettings.json覆盖的配置即可，即环境名称appsettings.{env}.json，例如：

appsettings.json

{env}

appsettings.Development.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "ConnectionStrings": {
    "myconn": "connection"
  }
}

无法加载基于环境的Appsettings.json

2 个答案: