ClientFunction.cs

[FunctionName("ClientFunction")]
public static async Task<IActionResult> ClientFunctionStart(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
[DurableClient] IDurableOrchestrationClient client,
ILogger log)
{
    string name = req.Query["name"];
    string instanceId = Guid.NewGuid().ToString();
    await client.StartNewAsync("OrchestrationFunction", instanceId, name);
    return client.CreateCheckStatusResponse(req, instanceId);
}