Question

我为Map Points创建了一个自定义XML结构。结构类似于下面的代码。我想要阅读这些点，并在点击时使用弹出窗口和特定的标记图标将它们放在地图上。我将不胜感激任何帮助。

MapPoints.xml

<MapPoints>
<MapPoint PointID="1">
    <LocationName></LocationName>
    <LocationAddress></LocationAddress>
    <LocationURL></LocationURL>
    <LocationExt></LocationExt>
    <LocationFax></LocationFax>
    <LocationLat></LocationLat>
    <LocationLong></LocationLong>
    <LocationMarker></LocationMarker>
</MapPoint>
<MapPoint PointID="2">
    <LocationName></LocationName>
    <LocationAddress></LocationAddress>
    <LocationURL></LocationURL>
    <LocationExt></LocationExt>
    <LocationFax></LocationFax>
    <LocationLat></LocationLat>
    <LocationLong></LocationLong>
    <LocationMarker></LocationMarker>
</MapPoint>
<MapPoint PointID="3">
    <LocationName></LocationName>
    <LocationAddress></LocationAddress>
    <LocationURL></LocationURL>
    <LocationExt></LocationExt>
    <LocationFax></LocationFax>
    <LocationLat></LocationLat>
    <LocationLong></LocationLong>
    <LocationMarker></LocationMarker>
</MapPoint>
<MapPoint PointID="4">
    <LocationName></LocationName>
    <LocationAddress></LocationAddress>
    <LocationURL></LocationURL>
    <LocationExt></LocationExt>
    <LocationFax></LocationFax>
    <LocationLat></LocationLat>
    <LocationLong></LocationLong>
    <LocationMarker></LocationMarker>
</MapPoint>
</MapPoints>

Answer 1

有许多示例使用属性here is one在“Mike Williams Google Maps API v2教程”格式中解析xml。

要使用“自定义”格式，您需要替换此行（以查找“MapPoint”而非“标记”）：

var markers = xmlDoc.documentElement.getElementsByTagName("marker");

和这些行：

      var lat = parseFloat(markers[i].getAttribute("lat"));
      var lng = parseFloat(markers[i].getAttribute("lng"));
      var point = new google.maps.LatLng(lat,lng);
      var html = markers[i].getAttribute("html");
      var label = markers[i].getAttribute("label");
      // create the marker
      var marker = createMarker(point,label,html);

使用代码解析xml中的元素内容。

要获取元素内容，您需要执行以下操作：

var lat = parseFloat(nodeValue(markers[i].getElementsByTagName("LocationLat")[0]));

其中nodeValue（从geoxml3借用）是：

//nodeValue: Extract the text value of a DOM node, with leading and trailing whitespace trimmed
geoXML3.nodeValue = function(node) {
  var retStr="";
  if (!node) {
    return '';
  }
   if(node.nodeType==3||node.nodeType==4||node.nodeType==2){
      retStr+=node.nodeValue;
   }else if(node.nodeType==1||node.nodeType==9||node.nodeType==11){
      for(var i=0;i<node.childNodes.length;++i){
         retStr+=arguments.callee(node.childNodes[i]);
      }
   }
   return retStr;
};

Answer 2

使用jquery。在你的HTML文档的头部，把这一行：

<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>

现在使用对本地XML文件的jQuery ajax调用。

        //pulls in the xml
        $.ajax({
        type: "GET",
            url: "MapPoints.xml",
            dataType: "xml",
            success: function(xml) {
                $(xml).find('MapPoint').each(function(){
                    var lat = $.trim(this.LocationLat);
                    var lng = $.trim(this.LocationLng);

                    //use the same method to extract your other data
                    var mappoint = new google.maps.LatLng(lng,lat);

                    //now create the marker and set it to your map
                    var marker = new google.maps.Marker({
                     position:mappoint,
                     map:map,
                     title:'Your Marker Title',
                     icon:null
                    });

                });

            }
            });

使用XML填充GoogleMap

2 个答案: