Using variables to add latitude, longitude Google Maps API, from Model in MVC

Question

I am trying to figure out a way to pull latitude, longitude data from a Model I have in MVC and display it using the Google Maps API. I have done research and there are some different methods that have worked for people but none that I can get to work in my project. I can't figure out the best/ most efficient way to do this or if I am even close. Any sort of help or guidance would be immensely appreciated.

I have my Model class that looks like this:

 public class Markers
{
    [Key]


    public double lat { get; set; }

    public double lon { get; set;}

    public Boolean stillActive { get; set; }

       }

}

I currently have a Controller class which is pretty bare. I am thinking this is where I need to put the logic to pass the required data to my View. I am only trying to use the lat and lon fields right now. Right now I have this after trying multiple different ways.

public class MapController : Controller {
private DBContext db = new DBContext();

public ActionResult Map() {

// Can't figure this out }

In my View I currently have the following code. What I can't figure out is am I supposed to be setting the variables in the Controller and then passing them to the View? Am I supposed to just access them in the View straight from the Model?? Is there an easy way/ hard way to do this? I want to show all the markers that are currently in the database. Here is my View:

 function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(50.0, -119.088889),
        zoom: 5,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    var map = new google.maps.Map(document.getElementById("map_canvas"),
      mapOptions);


    *//Create Marker   //Trying to take all values in the coloumns of lat and lon and 
                       and place them in the LatLng function. //* 
        var latlng = new google.maps.LatLng(*//WANT All instances of LAT HERE, //WANT all instances of LON HERE*);
    var marker = new google.maps.Marker({
        position: latlng,
        map: map,
            title: "My Marker"        
    });
}

Sorry if this is hard to read, I am a noob to StackOverFlow. Any direction will be greatly appreciated. Thanks in advance.

swazza85 · Accepted Answer · 2014-05-06 08:45:56Z

1

From what I understand, you are looking for an efficient way to pass data from the controller to the view. In your controller action, fetch the lat and long data from the dbContext. Once you have the data in your controller, you need to pass it along to the view. This can be done by passing a viewmodel to the view or by adding properties to the ViewBag. So your action code would look something like this if you were to use the ViewBag.

public ActionResult Map()
{
    Coordinates latLng = db.GetCoordinates();
    ViewBag.lat = latLng.lat;
    ViewBag.lng = latLng.lng;
    return View();
}

In your view, all you need to do is refer to the properties of the ViewBag.

var latlng = new google.maps.LatLng(@ViewBag.lat, @ViewBag.lng)

Hope this help.

answered May 6, 2014 at 8:45

swazza85

7214 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user3606300 Over a year ago

Thank you Swazza, I will be back to my computer over the weekend and will let you know how that works for me. I greatly appreciate it. I am assuming the Get.Coordinates method needs to be a constructor in the model?

thealghabban · Accepted Answer · 2014-05-06 02:28:07Z

0

Did you try one of these solutions :

https://encrypted.google.com/#q=google+map+%2B+%22MVC%22

https://www.youtube.com/watch?v=rSdbWck4zWc

https://www.youtube.com/watch?v=MQsFxWztYmI

notes : that if search you will find that there's some issues with google maps and MVC ..

edited May 6, 2014 at 2:28

answered May 6, 2014 at 2:22

thealghabban

4482 silver badges4 bronze badges

1 Comment

user3606300 Over a year ago

Yes I have tried to follow these. They all seem to skip the part that I really need which is the controller. I am fairly new to MVC so I am not even sure if I am understanding correctly. Do I need to return the lat and long from the model somehow? Do I do that in the controller?

Collectives™ on Stack Overflow

Using variables to add latitude, longitude Google Maps API, from Model in MVC

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related