How to get Azure Function name from within a function?

Question

My goal is to provide a code snippet to customers. One file will contain customer's business logic, another file will provide its handling. For the latter I need to have a name of a function [would like to avoid asking customers to enter this information manually].

I searched around but could not figure out. Essentially I need this:

Peter Bons · Accepted Answer · 2024-11-28 13:57:53Z

16

The ExecutionContext class has a property FunctionName (docs)

You can inject the class like this:

[FunctionName("HttpTriggered")]
public IActionResult Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]
     HttpRequest req, 
     ExecutionContext executionContext)
{
     var name = executionContext.FunctionName;
     ...
}

The output will be

HttpTriggered

Update 11-2025

For isolated runtime functions things are more complicated and you need the FunctionContext class and use FunctionDefinition.Name. See the docs. However, this class cannot be used using DI, see this issue. But, a workaround is presented in that same issue.

edited Nov 28, 2024 at 13:57

answered Apr 16, 2021 at 21:56

Peter Bons

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5 Comments

Deepak Shaw Over a year ago

Hi @Peter Bons , Does this work? I'm unable to 'FunctionName' from executionContext. Please clarify!! Thanks.

Peter Bons Over a year ago

@DeepakShaw I see that for isolated functions you'll need another class, see the updated answer

Deepak Shaw Over a year ago

Hi @Pater Bons, Thanks for updating your answer, however, when I inject the FunctionContext though Function Constructor, I'm getting this error: "System.InvalidOperationException: Unable to resolve service for type 'Microsoft.Azure.Functions.Worker.FunctionContext' while attempting to activate".

Peter Bons Over a year ago

@DeepakShaw My bad, seems for isolated functions DI cannot be used. See the updated answer for a possible workaround

Deepak Shaw Dec 3, 2024 at 0:30

@Pater Bons, Yes it worked just a little modification var fnName = functionContext.FunctionDefinition.Name;

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