Error Azure Functions Timer Graph

Question

I have a Timer Functions (beta version/v2) with that uses the Graph Api and a MySql connection. Everything was working while I had an Http Trigger but now that I've decided to use a Timer Function I'm getting the the error below.

What am I missing? Please let me know. @Jerry Liu, you might know the answer ;)

Error received:

2018-08-10T13:36:17 Welcome, you are now connected to log-streaming service. 2018-08-10T13:37:17 No new trace in the past 1 min(s). 2018-08-10T13:37:23.958 [Information] Script for function 'TimerTriggerMeetingRoom' changed. Reloading. 2018-08-10T13:37:30.447 [Error] run.csx(40,6): error CS1997: Since 'Run(TimerInfo, string, ILogger)' is an async method that returns 'Task', a return keyword must not be followed by an object expression. Did you intend to return 'Task'? 2018-08-10T13:37:30.548 [Information] Compilation failed.

This is my "run.csx" code:
#r "Newtonsoft.Json"
#r "System.Configuration"
#r "System.Data"


using System.Net; 
using System.Net.Http; 
using System.Net.Http.Headers; 
using System.Text;
using System;
using System.Globalization;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json;

using System.Configuration;

using System.Threading.Tasks;

public static async Task Run(TimerInfo myTimer, string graphToken, ILogger log)
{
    var currentTime = DateTime.UtcNow;
    var ramsey = new List<Ramsey>();

    log.LogInformation("C# HTTP trigger function processed a request.");

    HttpClient client = new HttpClient();
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", graphToken);
    var json = await client.GetStringAsync("https://graph.microsoft.com/v1.0/me/");


    log.LogInformation("C# HTTP trigger function processed a request.");
    JObject jResults = JObject.Parse(json);
    //log.LogInformation(jResults.ToString());
    var result= jResults["value"];
    log.LogInformation("value: "+result.ToString());

     return new HttpResponseMessage(HttpStatusCode.OK) 
    {
        Content = new StringContent(json, Encoding.UTF8, "application/json") 
    };
}


public class Ramsey
{
    public string subject { get; set; }
}

"Function.json":

{
  "bindings": [
    {
      "name": "myTimer",
      "type": "timerTrigger",
      "direction": "in",
      "schedule": "0 */15 * * * *"
    },
    {
      "name": "$return",
      "type": "http",
      "direction": "out"
    },
    {
      "type": "token",
      "name": "graphToken",
      "resource": "https://graph.microsoft.com",
      "identity": "UserFromRequest",
      "direction": "in"
    }
  ]
}

This is instead my "functions.proj" file:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Mobile.Client" Version="2.0.0"/>
    <PackageReference Include="MySql.Data" Version="7.0.7-m61"/>
  </ItemGroup>
</Project>

Marie Hoeger Marie Hoeger · Accepted Answer · 2018-08-09T18:01:55

It looks like this is your issue: [Error] run.csx(99,5): error CS1997: Since 'Run(TimerInfo, string, ILogger)' is an async method that returns 'Task', a return keyword must not be followed by an object expression. Did you intend to return 'Task'?

Note that in the stack trace of exceptions, there's a "script compilation error" and the error above that more specifically calls out the error in your function code.

I would change your method signature to be public static async void Run(...), and remove returning a new HttpResponseMessage (presumably on line 99). A simple return; would be better for a timer triggered function, as I can't see an HTTP output making sense in this context.

Error Azure Functions Timer Graph

1 Answers