在ASP.NET MVC中使用地理编码，并希望将经纬度从JS传输到控制器中的某些函数

Question

UPDATED.

I tried what you said. The function is.

  [HttpPost]
  public ActionResult populate_place(string lati, string longi)
   {
  list_placesModels list_place = new list_placesModels();
  list_place.Latitude = lati;
  list_place.Longitude = longi;
  return View();
   }   

But know its is not showing the new view. I don't know why ? Still the old view is shown. It is not redirecting to new view. The new view is not shown. It still remains on the same view.

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I am using Geo-coding feature of Google maps to access latitude and longitude of a location in my Razor view in asp.net mvc application.

I want to pass that Latitude and longitude to a function in controller. But nothing is happening. Below is my code snippet.

JS code:

if (status == google.maps.GeocoderStatus.OK) {

  map.setCenter(results[0].geometry.location);
  var marker = new google.maps.Marker( {
    map: map,
    [0].geometry.location
  });

  // I want to pass these value of latitude and longitude a function 
  // list_places() in UserController.
  latitude = results[0].geometry.location.lat();
  longitude = results[0].geometry.location.lng();   

  $.post("/User/list_places",
    {
      lati: latitude,
      longi : longitude
     });

Controller:

public ActionResult list_places(string usernameid, string lati, string longi) {

  list_placesModels list_place = new list_placesModels();
  list_place.Latitude = lati;
  list_place.Longitude = longi;
  return View(list_place);
}

Answer 1

It looks like a few things are missing, firstly a [HttpPost] attribute on the action you are posting too, then the correct number of arguments, it look slike your passing in 2 but expecting 3? See below for a working example.

Html/Javascript

<script type="text/javascript">
function buttonclick() {
    var requestData = {
        lati: 'latitude',
        longi: 'longitude'
    };

    $.ajax({
        url: '/Home/populate_place',
        type: 'POST',
        data: requestData,
        dataType: 'json'
    });
};
</script>

<button onclick="buttonclick()">Click</button>

Controller Action

[HttpPost]
public ActionResult populate_place(string lati, string longi)
{
    return RedirectToAction("About", "Home");
}

If you put a breakpoint on the controller actions return if you inspect the parameters you'll see they are populated.