ASP.NET Core MVC : return view and then redirect to another one

I'm new to ASP.NET Core MVC. I have code like this in my controller:

[HttpGet]
[AllowAnonymous]
public async Task<IActionResult> ConfirmEmail(string userId, string code)
{
    var result = await _userManager.ConfirmEmailAsync(user, code);
    return View(result.Succeeded ? "ConfirmEmail" : "Error");
}

The ConfirmEmail view will be returned and rendered. But after showing this ConfirmEmail view, I want to redirect to another route automatically and show another view.

How can I do that? Could you guide me, please?

Probably, it should have be done from my ConfirmEmail.cshtml view. So is there any way to call some redirect C# function after ConfirmEmail.cshtml rendering? Or something like that?

Solution

Probably, it should have be done from my ConfirmEmail.cshtml view.

Indeed it should. This is because an HTTP response can only have one response. A page (view) is a response, and a redirect ("location header") is a response. The controller can only return one or the other, not both.

So is there any way to call some redirect C# function after ConfirmEmail.cshtml rendering?

C# runs server-side. By the time the view is rendered in the browser, the server-side code has already executed on the server and is done.

After returning a view, you can redirect in client-side code. For example, if the view contains this:

<script type="text/javascript">
  window.location.replace("@Url.Action("actionName", "controllerName")");
</script>

Then the resulting client-side code would be something like:

<script type="text/javascript">
  window.location.replace("/controller/action");
</script>

This would immediately redirect the user to that URL. If you don't want it to be immediate then you could put it inside of a timeout:

<script type="text/javascript">
  setTimeout(function () {
    window.location.replace("@Url.Action("actionName", "controllerName")");
  }, 5000);
</script>

The value 5000 indicates that the operation should be performed after 5000 ms (5 seconds).