How to display the alert message and redirect to home page in ASP.NET

Question

I want to display alert message and redirect to the home page in controller.

The code for Create action is:

if (ModelState.IsValid)
{
    _context.Add(contact);
    await _context.SaveChangesAsync();
    

    return Content("<script language='javascript' type='text/javascript'>alert('Thanks for Feedback!');</script>");
   
}
return View(contact);

But I wanted to use the return RedirectToAction because it should redirect the user to the specific page in the final execution of code, so how do I replace the return content to redirect to Index page of HomeController ?

Answer 1

You can use TempData to store the message and then run the alert on the home page index view

In the controller

TempData["message"] = "Thanks for Feedback!";
return RedirectToAction("Index","Home");

In Index View (home)

@if (TempData["message"] != null)
{
    <script>alert('@TempData["message"]');</script>
}

The TempData will persist for the redirect, but after another page load, it will not be present.

Answer 2

在显示如下所示的警报消息后，尝试使用 'window.location.href' javascript 对象重定向到主页，

return Content("<script language='javascript' type='text/javascript'>alert('Thanks for Feedback!');window.location.href='/';</script>");