Upgrading Dotnet-Isolated Azure Function from .NET 6.0 to .NET 8.0, WorkerExtensions Causing Problems

Question

I've been trying to update my .NET Isolated Azure Function from .NET 6.0 to .NET 8.0.

My project is using the following packages

<PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0" />

<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.2.0" />

<PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.0" />

These packages are used by the function declaration(s):

[Function("MyFunction")]
public async Task<HttpResponseData> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = "MyFunction")] HttpRequestData request)

For unreasons, when I attempt to publish, the publish fails due to two 'csproj' files in the built code. An additional rogue csproj gets created for unknown reasons. The offender is ".\obj\Release\net8.0\WorkerExtensions\WorkerExtensions.csproj". Plus it's in "obj" and still causes problems.

There are also a bunch of '.net6.0' files located here even though I full upgraded everything to .net8.0.

".\obj\Release\net8.0\WorkerExtensions\obj\Release\net6.0"

I don't have any explicit reference to this 'WorkerExtensions'. I don't know why it exists. I did try removing those 'Functions.Worker' packages and build my functions using WebJobs. It compiled and able to be published. But no Http Triggers were visible on my Azure Function, assumingly because using a Dotnet isolated function.

If it helps, the published code contains these mysterious references to "Microsoft.Azure.Functions.Worker.Extensions/1.0.0" in "\bin\Release\net8.0.azurefunctions\function.deps.json"

As a hack, I am able to publish my function only via script that (1) builds the function, (2) explicitly deletes the offender 'csproj' file out of the 'obj' in the built files and then (3) publish it. The Azure function then runs, without issue and none the wiser.

Answer 1

Hi @ Shane Rowley (Data Sagacity),

Your issue clearly states that there are multiple references to .net6, even after upgrading it to .net8. I would suggest you to clean the project at once and rebuild it , so that only new packages in the project's csproj will be published.

First remove all the unwanted files and double files and then clean and rebuild the project:

And also this HttpResponseData is in lower version of .net and not in .net 8. So try to update your code as below:

    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 FunctionApp3

    {

        public static class Function1

        {

            [FunctionName("Function1")]

            public static async Task<IActionResult> Run(

                [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,

                ILogger rilg)

            {

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

                string responseMessage = "Hello Rithwik";

                return new OkObjectResult(responseMessage);

            }

        }

    }

Try below commands:

    dotnet clean

    rd /s /q bin

    rd /s /q obj

    dotnet restore

    dotnet build

Also update all the nuget packages as below:

As the issue is in local environment, I would suggest you to trouble shoot all the possible ways and last resort would be creating a new .net8 project and adding your functions over there.

Hope this helps.

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