c# - 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)。我正在门户网站上编码。

如何做到服务总线输出绑定(bind)？

这不起作用。有什么帮助吗？

-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(bind)将数据发送到服务总线。首先是您使用return显示的内容绑定(bind)，安装两个包后 Microsoft.Azure.WebJobs.Extensions.ServiceBus和WindowsAzure.ServiceBus ，然后您就可以发送数据了。你不能这样做，因为你的函数类型是 IActionResult并且您正在尝试返回 string (响应消息)。

所以如果你想发送整个responseMessage ，只是return new OkObjectResult(responseMessage); ，它会起作用。结果如下图所示。

如果你想使用return responseMessage;应该将您的方法类型更改为字符串，它将是 public static async Task<string> RunAsync结果如下。

另一个绑定(bind)你可以引用下面的代码或这个sample .

[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);

        }

How to define Connection of service bus? Where is Functions.json

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(bind) Connection 中使用value 应该是您在 json 文件中设置的名称。由于您使用的是c#，因此您无法修改 function.json文件，在debug文件夹下会有一个function.json文件。所以你只能改变代码中的绑定(bind)。

希望这可以帮助您，如果您还有其他问题，请随时告诉我。