如何使用Azure函数将数据发送到Service Bus主题？ [英] How to send data to Service Bus Topic with Azure Functions?

问题描述

我这里有默认的基于C#的HTTP触发器，我希望将数据"Hello name"发送到Service Bus主题(已经创建)。我在门户网站编程。

如何进行Service Bus输出绑定？

这不起作用。有可用的帮助吗？

-缺少处理服务总线的引用？

-如何定义服务总线的连接？Functions.json在哪里

-如何将消息发送到服务总线？

//This FunctionApp get triggered by HTTP and send message to Azure Service Bus

using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;

namespace Company.Function

{
    public static class HttpTriggerCSharp1
{
    [FunctionName("HttpTriggerCSharp1")]
    [return: ServiceBus("myqueue", Connection = "ServiceBusConnection")] // I added this for SB Output. Where to define.

    public static async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
        ILogger log)

    {
        log.LogInformation("C# HTTP trigger function processed a request.");
        string name = req.Query["name"];
        string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
        dynamic data = JsonConvert.DeserializeObject(requestBody);
        name = name ?? data?.name;
        string responseMessage = string.IsNullOrEmpty(name)
            ? "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response."
            : $"Hello, {name}. This HTTP triggered function executed successfully.";
        return new OkObjectResult(responseMessage);
        // I added this for SB Output
        return responseMessage;
    }
}

}

推荐答案

首先，有两个向服务总线发送数据的绑定。首先是您展示的，使用return绑定，在安装两个包Microsoft.Azure.WebJobs.Extensions.ServiceBus和WindowsAzure.ServiceBus之后，您就可以发送数据了。但您无法执行此操作，因为您的函数类型为IActionResult，并且您正在尝试返回string(ResponseMessage)。

因此，如果您想发送整个responseMessage，只发送return new OkObjectResult(responseMessage);，就可以了。结果如下图所示。

如果要使用return responseMessage;应将您的方法类型更改为字符串，则它将为public static async Task<string> RunAsync，结果将在下面。

下面的代码或此sample可以引用的另一个绑定。

[FunctionName("Function1")]
        [return: ServiceBus("myqueue", Connection = "ServiceBusConnection")]
        public static async Task RunAsync(
            [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
            [ServiceBus("myqueue", Connection = "ServiceBusConnection")] MessageSender messagesQueue,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger function processed a request.");

            string name = req.Query["name"];

            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
            dynamic data = JsonConvert.DeserializeObject(requestBody);
            name = name ?? data?.name;

            string responseMessage = string.IsNullOrEmpty(name)
                ? "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response."
                : $"Hello, {name}. This HTTP triggered function executed successfully.";

            byte[] bytes = Encoding.ASCII.GetBytes(responseMessage);
            Message m1 = new Message(bytes);
            await messagesQueue.SendAsync(m1);

        }

如何定义服务总线的连接？Functions.json在哪里

在本地，您应该在local.settings.jon中定义连接，您可以在连接中使用任何名称，然后在绑定中Connection值应该是您在json文件中设置的名称。并且因为您使用的是c#，所以您无法修改function.json文件，调试文件夹中将有一个function.json文件。所以您只能更改代码中的绑定。

希望这能对您有所帮助，如果您还有其他问题，请随时通知我。

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