c# - 在 Google map Controller 中关联列表负载？

Question

我陷入了这样一种情况，我需要在我的 Controller 中获取列表，但现在我正在使用 Kendo Grid 来获取将在我的 Google map 中使用的列表

现在我的问题是

1. 如何将 Controller 中的 LoadWorkerList 直接关联到我的 Googlemap 并将其添加为标记？

   2.如何在屏幕上制作标记列表？

这是我的 Google map Javascript:

<script type="text/javascript">
var geocoder;
    var map;
    function initialize() {
        var minZoomLevel = 4;
        var zooms = 7;
        geocoder = new google.maps.Geocoder();

        map = new google.maps.Map(document.getElementById('map'), {
            zoom: minZoomLevel,
            center: new google.maps.LatLng(38.50, -90.50),
            mapTypeId: google.maps.MapTypeId.ROADMAP
        });

        // Bounds for North America
        var strictBounds = new google.maps.LatLngBounds(
     new google.maps.LatLng(15.70, -160.50),
     new google.maps.LatLng(68.85, -55.90)
   );

        // Listen for the dragend event
        google.maps.event.addListener(map, 'dragend', function () {
            if (strictBounds.contains(map.getCenter())) return;

            // We're out of bounds - Move the map back within the bounds

            var c = map.getCenter(),
         x = c.lng(),
         y = c.lat(),
         maxX = strictBounds.getNorthEast().lng(),
         maxY = strictBounds.getNorthEast().lat(),
         minX = strictBounds.getSouthWest().lng(),
         minY = strictBounds.getSouthWest().lat();

            if (x < minX) x = minX;
            if (x > maxX) x = maxX;
            if (y < minY) y = minY;
            if (y > maxY) y = maxY;

            map.setCenter(new google.maps.LatLng(y, x));
        });


        // Limit the zoom level
        google.maps.event.addListener(map, 'zoom_changed', function () {
            if (map.getZoom() < minZoomLevel) map.setZoom(minZoomLevel);
        });
    }
    var iconBase = 'https://maps.google.com/mapfiles/kml/shapes/';
    function codeAddress() {
        var infowindow = new google.maps.InfoWindow();
        var address = $('#workerGrid').find("input[name=shiftDay]");
        alert(address);
        $.each(address, function () {
            var currVal = $(this).val();
            address.each(function () {
                geocoder.geocode({ 'address': currVal }, function (results, status) {
                    if (status == google.maps.GeocoderStatus.OK) {

                        map.setCenter(results[0].geometry.location);
                        var marker = new google.maps.Marker({
                            map: map,
                            icon: iconBase + 'man.png',
                            position: results[0].geometry.location,
                            title: currVal
                        });
                        var circle = new google.maps.Circle({
                            map: map,
                            radius: 16093,    // 10 miles in metres
                            fillColor: '#AA0000'
                        });

                        circle.bindTo('center', marker, 'center');


                        google.maps.event.addListener(marker, 'click', (function (marker, i) {
                            return function () {
                                infowindow.setContent(currVal);
                                infowindow.open(map, marker);
                            }
                        })(marker, currVal));

                        address.push(marker);


                    }
                    else {
                        alert("Geocode was not successful for the following reason: " + status);
                    }
                });

            });
        });
        return true;
    }

    window.onload = function () {
        initialize();
        codeAddress();

    }

</script> 

这是我的 Controller 代码:

public JsonResult LoadWorkerList()
        {
            var workerList = new List<Worker_Address>();

            // check if search string has value
            // retrieve list of workers filtered by search criteria
            var list = (from a in db.Worker_Address
                        where a.LogicalDelete == false
                        select a).ToList();



            List<WorkerAddressInfo> wlist = new List<WorkerAddressInfo>();
            foreach (var row in list)
            {
                WorkerAddressInfo ci = new WorkerAddressInfo
                {
                    ID = row.ID,
                    Worker_ID = row.WorkerID,
                    AddressLine1 = row.Address_Line1 + " " + row.Address_Line2+ " " +row.City + " "+ GetLookupDisplayValById(row.State_LookID),
                    LogicalDelete = row.LogicalDelete

                };
                wlist.Add(ci);
            }


            return Json(wlist.ToList().OrderBy(p => p.AddressLine1), JsonRequestBehavior.AllowGet);
        }

Answer 1

Google API 使用地理位置，因此您应该存储纬度和经度值(或者您可能每次都会动态生成它们，但这将是一个缓慢的过程)。假设您将其作为实用程序工作，那么您可以从后端创建 javascript 的位置列表。最后应该是这样的:

var locations = [
      ['<h4>Worker Name 1</h4>', lat1, lon1],
      ['<h4>Worker Name 2</h4>', lat2, lon2],
      ...
      ['<h4>Worker Name N</h4>', latN, lonN]
    ];

然后将它们添加到您的 map 中:

   var marker;
    var markers = new Array();

for (var i = 0; i < locations.length; i++) {  
      marker = new google.maps.Marker({
        position: new google.maps.LatLng(locations[i][1], locations[i][2]),
        map: map
      });

markers.push(marker);