IOptions DI in Azure Function

[ranouf]

Hi,

I would like to resolve IOptions using AzureFunctions.Autofac nuget package.

Usually in a webapi, we can use:

    public IServiceProvider ConfigureServices(IServiceCollection services)
    {
        [...]

        services.Configure<MySettings>(config.GetSection("My"));

        // Autofac
        var builder = new ContainerBuilder();
        builder.Populate(services);

        [...]
    }

But in an Azure function, the populate option is not available throw the nuget package Autofac.Extensions.DependencyInjection:

How are you available to access to IOptions in Azure function using Autofac DI?

Thanks for your help.

[tillig]

It appears the AzureFunctions.Autofac package has forced an exact version match for core Autofac. I can't tell you why, but that's the problem.

AzureFunctions.Autofac is not owned by the Autofac organization. Contact the owners through their NuGet page.

[ranouf]

Thanks for the information @tillig !

[ranouf]

If I want to use only Autofac nuget, do you have sample on how to use it with Azure Function?

[tillig]

No, sorry. There may be stuff on StackOverflow or Google.

[ranouf]

Hi @tillig

I found this:
https://docs.microsoft.com/en-us/azure/azure-functions/functions-dotnet-dependency-injection

It s pretty new, it s the official way to do DI in Azure Function, but from I read on different forums, it seems not possible to use Autofac with it:

• Integrate Microsoft.Azure.Functions.Extensions with Autofac Azure/azure-functions-host#4429
• Dependency Injection support for Functions Azure/azure-functions-host#3736

Is there a way to use Autofac using the new microsoft DI implementation ?

[tillig]

I have no experience using Azure Functions and, unfortunately, no time at the moment to become an expert and research this for you. Your best bet is to check out StackOverflow and/or maybe ping the authors of AzureFunctions.Autofac. You may also try to determine the best route by looking at some of our other integrations, like the one for Service Fabric or something to give you ideas... but I can't even point you in the right direction because I've never used Azure Functions. It looks like the issues you linked may be good places to follow up, too.

[ranouf]

Thanks, I will :)