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azure - Webjobs 方法索引 - 依赖注入异常 IConfiguration

问题描述

.NET Core 2.2，WebJobs SDK v3.0

我像这样初始化我的主机

        HostBuilder builder = new HostBuilder();
        builder.ConfigureAppConfiguration((context, configApp) => {
            configApp.AddJsonFile("appsettings.json", optional: true);
            configApp.AddJsonFile(
               $"appsettings.{context.HostingEnvironment.EnvironmentName}.json",
               optional: true);
        });

        builder.ConfigureWebJobs((context, configure) => {
            configure.AddAzureStorage();
            configure.Services.AddSingleton(context.Configuration);
        });

        builder.ConfigureServices((context, services) => {
            services.AddSingleton(context.Configuration);
        });

我在队列中处理消息的 webJob 函数如下所示：

public static void ProcessQueueMessage([QueueTrigger("queuename")] CloudQueueMessage queueMessage, 
  TextWriter log, IConfiguration configuration)

当我的主机启动时，我得到一个异常

Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexingException: 'Error indexing method 'Functions.ProcessQueueMessage''

InvalidOperationException: Cannot bind parameter 'configuration' to type IConfiguration. Make sure the parameter Type is supported by the binding. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.).

我究竟做错了什么？

标签： azureazure-webjobsazure-webjobssdk

解决方案

您可以使用完整的类和构造函数注入，而不是使用静态函数和参数注入。


services.AddScoped<Functions>()
services.AddSingleton(context.Configuration);

...

public class Functions
{
    private readonly IConfiguration _Configuration;

    public Functions(IConfiguration configuration)
    {
        _Configuration = configuration ?? throw new ArgumentNullException(nameof(configuration));
    }

    public void ProcessQueueMessage([QueueTrigger("queuename")] CloudQueueMessage queueMessage, 
      TextWriter log)
    {
       //
    }
}

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