public HomeController(ILogger <HomeController> logger, SingletonGuidService singleton, ScopedGuidService scoped, TransientGuidService transient)
{
_logger = logger;
singletonGUID = singleton;
scopedGUID = scoped;
transientGUID = transient;
}
public HomeController(ILogger <HomeController> logger,
SingletonGuidService singleton,
ScopedGuidService scoped,
TransientGuidService transient) // constructor injection
{
_logger = logger;
_singleton = singleton;
_scoped = scoped;
_transient = transient;
}
public IActionResult Index([FromServices] SingletonGuidService singleton, [FromServices] ScopedGuidService scoped, [FromServices] TransientGuidService transient)
{
/*
* ViewData["singleton"] = singletonGUID;
* ViewData["scoped"] = scopedGUID;
* ViewData["transient"] = transientGUID;
*/
TempData.Clear();
return(View());
}
// we can do DI to individual action methods
// (if it's expensive to initialize that service, and only one aciton method needs)
public IActionResult Index([FromServices] SingletonGuidService singleton,
[FromServices] ScopedGuidService scoped,
[FromServices] TransientGuidService transient)
{
// ViewData and friends
// sometimes, it's not worth it to try and fit every piece of data the view needs into
// the model / viewmodel.
// ViewData is basically a dictionary of string to object.
ViewData["singleton"] = _singleton;
ViewData["scoped"] = _scoped;
ViewData["transient"] = _transient;
ViewData["singleton2"] = singleton;
ViewData["scoped2"] = scoped;
ViewData["transient2"] = transient;
return(View());
}