如何将JS数据从脚本文件传递到C＃方法

Question

I've been wracking my brain over this problem for a while. How can I invoke a JS function and retrieve the data to be used within a C# method?

Should I be using ViewBag in this example?

.cshtml

<script>
  function somefunction(str)
   {
      //use str within Index() method
      return str;
   }
</script>

Controller

   public IActionResult Index()
        {
            //use the data within this method
            return View();
        } 

Answer 1

Have you tried this

In javascript function:

//Do your action
window.location.href = '@Url.Action("Index", new { value = 1})';

and modify the Index Action to accept parameter like this:

public ActionResult Index(int value)

As your Index returns a View, window.location.href will basically redirect to Index action.

You can also create an url using string concatenation in javascript and use that url to redirect.

In my case the @Url.Action converts to this URL : '/Home/Index?value=1'.