c# - Azure 函数 local.settings.json 在 ServiceBusTrigger 的 appsettings.json 中表示

Question

我目前有一个使用 ServiceBusTrigger 绑定(bind)的 azure 函数

 [ServiceBusTrigger("%TopicName%", "%SubscripionName%", Connection = "MyConnection")]
         string  catclogueEventMsgs, ILogger log, ExecutionContext context)

它使用这个 local.settings.json 文件

   "Values": {
             …
    "MyConnection": "Endpoint=sb://testxxxxxxxxxxxxxxxxxx
    "SubscriptionName": "testsubscriptionName"
    "TopicName": "testtopicName",
  }

如何在 appsettings.json 文件中表示这一点。会像下面这样吗？

   "Values": {
    "MyConnection": "Endpoint=sb://testxxxxxxxxxxxxxxxxxx
    "SubscriptionName": "testsubscriptionName"
    "TopicName": "testtopicName",
  }

我可以使用如下所示的“MySubs”对象来代替使用“Values”对象吗？

   "MySubs": {
    "MyConnection": "Endpoint=sb://testxxxxxxxxxxxxxxxxxx
    "SubscriptionName": "testsubscriptionName"
    "TopicName": "testtopicName",
  }

如果可以使用上述设置，我如何在 ServiceBusTrigger 绑定(bind)中表示它？我可以把它改成这个吗？

 [ServiceBusTrigger("%MySubs.TopicName%", "%MySubs.SubscripionName%", Connection = "MySubs.MyConnection")]
         string  catclogueEventMsgs, ILogger log, ExecutionContext context)

Answer 1

您确实可以读取 Values 数组外部的设置，如下所示:

WeatherApiConfig.cs

public class WeatherApiConfig
{
    public string WeatherApiUrl { get; set; }
    public string WeatherApiKey { get; set; }
}

New for Azure Functions V2, we have an appropriate way to handle DI as shown below:

启动.cs

[assembly: FunctionsStartup(typeof(BlazingDemo.Api.Startup))]

namespace BlazingDemo.Api
{
    public class Startup : FunctionsStartup
    {
        public override void Configure(IFunctionsHostBuilder builder)
        {
            var config = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("local.settings.json", optional: true, reloadOnChange: true)
                .AddEnvironmentVariables()
                .Build();

            var apiConfig = new WeatherApiConfig();
            config.Bind(nameof(WeatherApiConfig), apiConfig);

            builder.Services.AddSingleton(apiConfig);
            builder.Services.AddHttpClient();
        }
    }
}

Local.settings.json

{  
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet"
  },
  "WeatherApiConfig": {
    "WeatherApiUrl": "http://api.openweathermap.org/data/2.5/weather",
    "WeatherApiKey": "**removed**"
  }
}

Note: The key for me was to add .SetBasePath(Directory.GetCurrentDirectory()) in Startup.cs since it couldn't find the file without it.

在生产中，我使用函数应用的 Application Settings 部分来配置这两个属性，如下所示: