[英]Google Map Markers not displaying in MVC
我试图通过使用不同的示例,通过我的MVC模型使用纬度和经度呈现Google地图。 Google Map正常显示,但未显示标记。 我是Google地图的新手,对此一无所知。 能否请任何人告诉我如何获得标记?
我的MVC观点如下
if (Model.WidgetType == "Map")
{
<div class="experienceRestrictedText">
<script src="//maps.google.com/maps/api/js?sensor=false&callback=initialize" type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
var London = new google.maps.LatLng(@Html.Raw(Json.Encode(Model.UserLatitude)), @Html.Raw(Json.Encode(Model.UserLongitude)));
// These are options that set initial zoom level, where the map is centered globally to start, and the type of map to show
var mapOptions = {
zoom: 14,
center: London,
mapTypeId: google.maps.MapTypeId['ROADMAP']
};
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
$.get("/Home/GetMapLocations", function(data){
$.each(data, function(i, item){
var marker = new google.maps.Marker({
'position' : new google.maps.LatLng(item.Latitude, item.Longitude),
'map' : map,
'title': item.EngineerName
});
});
});
@*var data = @Html.Raw(Newtonsoft.Json.JsonConvert.SerializeObject(Model.lstMapLocations));
$.each(data, function (i, item){
var marker = new google.maps.Marker({
'position' : new google.maps.LatLng(item.Latitude, item.Longitude),
'map' : map,
'title': item.EngineerName
});
});*@
}
</script>
<div class="map" id="map" style="width:690px; height:400px;"></div>
</div>
}
MVC控制器如下
public ActionResult GetMapLocations()
{
var lstMapLocations = new List<MapLocation>();
var mapLocationModel1 = new MapLocation
{
EngineerName = "Engineer1",
SiteName = "Site1",
Latitude = 51.507351,
Longitude = -0.127758,
LstDouble = new List<double>()
};
var mapLocationModel2 = new MapLocation
{
EngineerName = "Engineer2",
SiteName = "Site2",
Latitude = 51.481728,
Longitude = -0.613576,
LstDouble = new List<double>()
};
var mapLocationModel3 = new MapLocation
{
EngineerName = "Engineer3",
SiteName = "Site3",
Latitude = 51.628611,
Longitude = -0.748229,
LstDouble = new List<double>()
};
var mapLocationModel4 = new MapLocation
{
EngineerName = "Engineer4",
SiteName = "Site4",
Latitude = 51.26654,
Longitude = -1.092396,
LstDouble = new List<double>()
};
lstMapLocations.Add(mapLocationModel1);
lstMapLocations.Add(mapLocationModel2);
lstMapLocations.Add(mapLocationModel3);
lstMapLocations.Add(mapLocationModel4);
foreach(var item in lstMapLocations)
{
item.LstDouble.Add(item.Latitude);
item.LstDouble.Add(item.Longitude);
item.LatLong = item.LstDouble.ToArray();
}
return Json(lstMapLocations);
}
我找到了解决我的问题的方法,并想与那些偶然发现类似问题的人分享。 礼貌的堆栈溢出帖子,特别是Atish Dipongkor发布的答案。 可能有更好的替代方法来解决此问题,但是这种方法解决了我的问题。 由于Atish在从模型中检索数据时使用了撇号,因此如果在任何模型字段中都包含带有撇号的字符串数据,则可能会破坏功能,因此我对该答案的更改不大。 我对上述虚拟数据的附加解决方案如下
<div class="experienceRestrictedText">
<script src="//maps.google.com/maps/api/js?sensor=false&callback=initialize" type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
var London = new google.maps.LatLng(@Html.Raw(Json.Encode(Model.UserLatitude)), @Html.Raw(Json.Encode(Model.UserLongitude)));
// These are options that set initial zoom level, where the map is centered globally to start, and the type of map to show
var mapOptions = {
zoom: 8,
center: London,
mapTypeId: google.maps.MapTypeId['ROADMAP']
};
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
@foreach (var item in Model.lstMapLocations)
{
<text>
var markerLatLong = new google.maps.LatLng(@(item.Latitude), @(item.Longitude));
var markerTitle = @Html.Raw(Json.Encode(item.EngineerName));
var markerContentString = @Html.Raw(Json.Encode(item.EngineerName)) + " At " + @Html.Raw(Json.Encode(item.SiteName));
var infowindow = new google.maps.InfoWindow({
content: markerContentString
});
var marker = new google.maps.Marker({
position: markerLatLong,
title: markerTitle,
map: map,
content: markerContentString
});
google.maps.event.addListener(marker, 'click', (function (marker) {
return function () {
infowindow.setContent(marker.content);
infowindow.open(map, marker);
}
})(marker));
</text>
}
}
</script>
<div class="map" id="map" style="width:690px; height:400px;"></div>
</div>
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