c# - Azure函数: Cannot bind parameter '_return' to type HttpResponseMessage

Question

我从 quickstart guide 创建了基本的 Azure 函数。根据教程，这个默认功能应该立即起作用，但我收到错误。

函数体:

using System.Net;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    log.Info("C# HTTP trigger function processed a request.");

    // parse query parameter
    string name = req.GetQueryNameValuePairs()
        .FirstOrDefault(q => string.Compare(q.Key, "name", true) == 0)
        .Value;

    // Get request body
    dynamic data = await req.Content.ReadAsAsync<object>();

    // Set name to query string or body data
    name = name ?? data?.name;

    return name == null
        ? req.CreateResponse(HttpStatusCode.BadRequest, "Please pass a name on the query string or in the request body")
        : req.CreateResponse(HttpStatusCode.OK, "Hello " + name);
}

错误消息:

Function ($HttpTriggerCSharp1) Error: Microsoft.Azure.WebJobs.Host: Error indexing method 'Functions.HttpTriggerCSharp1'. Microsoft.Azure.WebJobs.Host: Cannot bind parameter '_return' to type HttpResponseMessage&. Make sure the parameter Type is supported by the binding. If you're using binding extensions (e.g. ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. config.UseServiceBus(), config.UseTimers(), etc.).

Answer 1

您现在可以通过将响应输出绑定(bind)的名称从 $return 更改为 res 来解决此问题。前者很快就会在我们的下一个版本中运行，但目前还没有。看来我们推出功能模板更新有点太早了 - 我创建了一个错误 here在我们针对该问题的存储库中。谢谢:)