控制器操作代码
[HttpGet]
public JsonResult findlatlon()
{
Models.Vehicle_Tracking_SystemEntities entities = new Vehicle_Tracking_SystemEntities();
var latlon = entities.LatLangs.ToList();
return Json(new { AddressResult = latlon }, JsonRequestBehavior.AllowGet);
}
findlatlon.cshtml查看代码
{ ViewBag.Title = "findlatlon"; }
<script src="~/Scripts/jquery-1.8.2.js"></script>
<script src="~/Scripts/jquery-1.8.2.min.js"></script>
<script src="~/Scripts/jquery.unobtrusive-ajax.js"></script>
<script src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCM7G5ruvunb0K7qxm6jb1TssJUwROqs-g" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
var myMarkers = [];
$.ajax({
async: false,
type: "POST",
dataType: "json",
url: '@Url.Action("findlatlon", "Home")',
data: '{}',
success: function(result) {
//get address from controller action.....
myMarkers = result.AddressResult;
}
});
//init google map
function googleMap() {
//alert("Hellooooooo");//alert
var mapOptions = {
center: new google.maps.LatLng(myMarkers[0].Latitude, myMarkers[0].Langitude),
zoom: 2,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
//alert(myMarkers[0].Latitude);//alert
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
for (i = 0; i < myMarkers.length; i++) {
data = myMarkers[i];
var marker = new google.maps.Marker({
position: new google.maps.LatLng(data.Latitude, data.Langitude),
map: map
});
(function(marker, data) {
google.maps.event.addListener(marker, "click", function(e) {
infoWindow.setContent(data.Location_Adress);
infoWindow.open(map, marker);
});
})(marker, data);
}
}
//....
google.maps.event.addDomListener(window, 'load', googleMap);
})
</script>
<div id="map_canvas" style="border-top: none; width: 100%; margin-top: -1px;
height: 250px; background-color: #FAFAFA; margin-top: 0px;">
</div>
{＆＃34; AddressResult＆＃34;：[{＆＃34;标识＆＃34;：1，＆＃34;纬度＆＃34;：＆＃34; 33.9982＆＃34;＆＃34; Langitude＆ ＃34;：＆＃34; 71.4999＆＃34;＆＃34;地址＆＃34;：＆＃34;白沙瓦＆＃34;＆＃34;图像＆＃34;：空，＆＃34;名称＆＃34 ;：＆＃34;白沙瓦＆＃34;}]}
所以这里AJAX调用控制器和控制器从数据库中检索经度和纬度，并将其返回到json字符串中，以便像上面的输出一样进行查看。
但是在这里我希望由json返回的纬度和经度值分配给
中心：new google.maps.LatLng(myMarkers[0].Latitude, myMarkers[0].Langitude)
我想根据Lat和Long显示谷歌地图上的位置
答案 0 :(得分：0)
以下是点击按钮时显示谷歌地图的示例，相应地显示您的回复，确保使用'markers.push（v）;'需要相应地更改您的代码。
var markers = [];
window.onload = function () {
$('#getMap').click(function () {
var deviceId = $('#deviceNumber').val();
if (deviceId != null || deviceId != "") {
$.ajax({
type: "GET",
url: url,
data: {},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
$.each(data, function (i, v) {
markers.push(v);
});
var mapOptions = {
center: new google.maps.LatLng(markers[0].Latitude, markers[0].Longitude),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var infoWindow = new google.maps.InfoWindow();
var lat_lng = new Array();
var latlngbounds = new google.maps.LatLngBounds();
for (i = 0; i < markers.length; i++) {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.Latitude, data.Longitude);
lat_lng.push(myLatlng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title
});
latlngbounds.extend(marker.position);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.description);
infoWindow.open(map, marker);
});
})(marker, data);
}
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
//***********ROUTING****************//
//Initialize the Path Array
var path = new google.maps.MVCArray();
//Initialize the Direction Service
var service = new google.maps.DirectionsService();
//Loop and Draw Path Route between the Points on MAP
for (var i = 0; i < lat_lng.length; i++) {
if ((i + 1) < lat_lng.length) {
var src = lat_lng[i];
var des = lat_lng[i + 1];
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.DRIVING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
var path = new google.maps.MVCArray();
var poly = new google.maps.Polyline({
map: map,
strokeColor: '#4986E7'
});
poly.setPath(path);
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});
}
}
},
error: function () {
alert('error');
}
});
}
});
}
希望这有帮助！
答案 1 :(得分：0)
步骤1首先创建控制器操作：
public ActionResult googlemap()
{
return View();
}
步骤2为此操作创建空视图：
@{
ViewBag.Title = "Google Map";
}
<script src="~/Scripts/jquery-1.8.2.js"></script>
<script src="~/Scripts/jquery-1.8.2.min.js"></script>
<script src="http://maps.googleapis.com/maps/api/js?key=YOUR-KEY" type="text/javascript"></script>
<script type="text/javascript">
var myMarkers = [];
$.ajax({
async: false,
type: "POST",
dataType: "json",
url: '@Url.Action("googlemapfindlatlon", "Home")',
data: '{}',
success: function (data) {
$.each(data, function (i, v) {
myMarkers.push(v);
});
var mapOptions = {
center: new google.maps.LatLng(myMarkers[0].Latitude, myMarkers[0].Langitude),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
//alert(myMarkers[0].Latitude)
//alert(myMarkers[0].Langitude)
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
var lat_lng = new Array();
var latlngbounds = new google.maps.LatLngBounds();
for (i = 0; i < myMarkers.length; i++) {
var data = myMarkers[i]
var myLatlng = new google.maps.LatLng(data.Latitude, data.Langitude);
lat_lng.push(myLatlng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title
});
latlngbounds.extend(marker.position);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.Address);
infoWindow.open(map, marker);
});
})(marker, data);
}
//map.setCenter(latlngbounds.getCenter());
//map.fitBounds(latlngbounds);
}
});
//init google map
}
</script>
<div id="map_canvas" style="border-top: none; width: 100%; margin-top: -1px;
height: 250px; background-color: #FAFAFA; margin-top: 0px;">
</div>
步骤3从上面的视图中可以看到ajax调用，即 url：'@ Url.Action（“googlemapfindlatlon”，“Home”）' 所以在控制器中创建“googlemapfindlatlon”JsonResult动作：
public JsonResult googlemapfindlatlon()
{
Models.Vehicle_Tracking_SystemEntities entities = new Vehicle_Tracking_SystemEntities();
var latlon = entities.LatLangs.ToList();
//var latlon = entities.LatLangs.OrderByDescending(x => x.Id).Take(1).ToList();
return Json(latlon, JsonRequestBehavior.AllowGet);
}
这对我来说是正常的。 非常感谢