要从appsettings.json中的自定义命名节中检索值，您需要实现一种机制来访问此节并通过运行时绑定将其传递给Azure Function。
在appsettings文件的根目录中设置它们并给予它们一个自定义名称可能会更简单，更直接，如下所示：代码：

public async Task Run( [ServiceBusTrigger("%CustomQueueName%", Connection = "CustomServiceBus")]

appsettings.json:

{
   "CustomQueueName": "SbQueueName",
   "CustomServiceBus": "Endpoint=sb:...."
}

至于使用自定义的appsettings配置文件，请在Startup.cs中使用以下行：

public override void Configure(IFunctionsHostBuilder builder)
    {
        var services = builder.Services;
        var context = builder.GetContext();

        var config = new ConfigurationBuilder()
            .AddJsonFile(Path.Combine(context.ApplicationRootPath, "appsettings.json"), false)
            // Custom appsettings
            .AddJsonFile(Path.Combine(context.ApplicationRootPath, "appsettings.Custom.json"), false) // Or whatever name you'd like
            .AddEnvironmentVariables();
       ...
       }