Content Comparison

Method via Azure Portal or PowerShell

To disable a function means to make the runtime ignore the automatic trigger that's defined for the function. This lets you prevent a specific function from running without stopping the entire function app.

...

Update-AzFunctionAppSetting -Name <FUNCTION_APP_NAME> -ResourceGroupName <RESOURCE_GROUP_NAME> -AppSetting @{"AzureWebJobs.QueueTrigger.Disabled" = "false"}

Other Method via C# class librairies

This attribute lets you customize the name of the setting used to disable the function. BUT - This method lets you enable and disable the function by changing the app setting, without recompiling or redeploying. Changing an app setting causes the function app to restart, so the disabled state change is recognized immediately.

public static class QueueFunctions
{
    [Disable("MY_TIMER_DISABLED")]
    [FunctionName("QueueTrigger")]
    public static void QueueTrigger([QueueTrigger("myqueue-items")] string myQueueItem, 
        TraceWriter log)
    {
        log.Info($"C# function processed: {myQueueItem}");
    }
}