调试Http触发器Azure功能VS 2017

我有Visual Studio 2017 15.3并安装了Azure开发工作负载。调试Http触发器Azure功能VS 2017

我根据本文创建一个空白HttpTrigger：

http://www.c-sharpcorner.com/article/getting-started-with-microsoft-azure-functions-using-visual-studio-2017/

我可以调试成功，如果我用Name作为参数查询字符串。

不过，如果我使用邮差来创建此POST请求：

{ 
    "name": "Azure" 
}

我收到以下错误：

"mscorlib: Exception while executing function: HttpTrigger . Anonymously Hosted DynamicMethods Assembly: 'Newtonsoft.Json.Linq.JObject' doe s not contain a definition for 'name'."

这是我在Visual Studio 2017的功能应用代码：

using System.Linq; 
using System.Net; 
using System.Net.Http; 
using System.Threading.Tasks; 
using Newtonsoft.Json; 
using Newtonsoft.Json.Linq; 
using Microsoft.Azure.WebJobs; 
using Microsoft.Azure.WebJobs.Extensions.Http; 
using Microsoft.Azure.WebJobs.Host; 

namespace VS2017TestFunctionApp 
{ 
    public static class HttpTrigger 
    { 
     [FunctionName("HttpTrigger")] 
     public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]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); 
     } 
    } 
}

另外，如果我在Run函数中复制完全相同的代码并在af中使用相同的测试帖子通过Azure门户联合应用程序，它一切正常。