如何使用 Azure Functions 将数据发送到服务总线主题？

Question

我这里有默认的基于 C# 的 HTTP 触发器，我希望将数据“Hello Name”发送到服务总线主题（已创建）。我在门户网站上编码。

如何做到服务总线输出绑定？

这是行不通的。任何可用的帮助？

- 缺少处理服务总线的参考？

- 如何定义服务总线的连接？Functions.json 在哪里

- 如何向服务总线发送消息？

//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;
    }
}

}

Answer 1

首先，有两个绑定将数据发送到服务总线。首先是您所显示的，使用return绑定，安装两个包后Microsoft.Azure.WebJobs.Extensions.ServiceBus，WindowsAzure.ServiceBus然后您将能够发送数据。你不能这样做，因为你的函数类型是IActionResult并且你正在尝试返回string（responseMessage）。

所以如果你想发送整个responseMessage，return new OkObjectResult(responseMessage);就可以了。结果如下图所示。

如果您想使用，return responseMessage;请将方法类型更改为字符串，public static async Task<string> RunAsync结果如下。

您可以参考下面的代码或此示例的另一个绑定。

[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 中定义连接local.settings.jon，您可以对连接使用任何名称，然后在绑定Connection值中应该是您在 json 文件中设置的名称。由于你使用的是c#，所以你无法修改该function.json文件，在debug文件夹中会有一个function.json文件。所以你只能改变代码中的绑定。

希望这可以帮助您，如果您还有其他问题，请随时告诉我。