[英]How to display location on markers of google maps when clicked?
我已經從數據庫表中提取了緯度和經度,並在帶有標記的google地圖上進行了顯示。您能建議我如何進行嗎?我還提供了可能對您有幫助的示例代碼。請幫助我。
<?php
$dbname='140dev';
$dbuser='root';
$dbpass='root';
$dbserver='localhost';
$dbcnx = mysql_connect ("$dbserver", "$dbuser", "$dbpass");
mysql_select_db("$dbname") or die(mysql_error());
$sql = mysql_query("SELECT * FROM tweets1");
$res = mysql_fetch_array($sql);
$lat_d = $res['geo_lat'];
$long_d = $res['geo_long'];
// mimic a result array from MySQL
$result = array(array('geo_lat'=>$lat_d,'geo_long'=>$long_d));
?>
<!doctype html>
<html>
<head>
<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?key="API_key"&sensor=false"></script>
<script type="text/javascript">
var map;
function initialize() {
// Set static latitude, longitude value
var latlng = new google.maps.LatLng(<?php echo $lat_d; ?>, <?php echo $long_d; ?>);
// Set map options
var myOptions = {
zoom: 16,
center: latlng,
panControl: true,
zoomControl: true,
scaleControl: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
// Create map object with options
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
<?php
// uncomment the 2 lines below to get real data from the db
$result = mysql_query("SELECT * FROM tweets1");
while ($row = mysql_fetch_array($result))
echo "addMarker(new google.maps.LatLng(".$row['geo_lat'].", ".$row['geo_long']."),
map);";
?>
}
function addMarker(latLng, map) {
var marker = new google.maps.Marker({
position: latLng,
map: map,
draggable: true, // enables drag & drop
animation: google.maps.Animation.DROP
});
var contentString = latLng.lat() + " , " + latLng.lng();
geocoder.geocode({'latLng': latlng}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[1]) {
map.setZoom(11);
marker = new google.maps.Marker({
position: latlng,
map: map
});
infowindow.setContent(results[1].formatted_address);
infowindow.open(map, marker);
} else {
alert('No results found');
}
} else {
alert('Geocoder failed due to: ' + status);
}
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map,marker);
});
}
</script>
</head>
<body onload="initialize()">
<div style="float:left; position:relative; width:550px; border:0px #000 solid;">
<div id="map_canvas" style="width:950px;height:700px;border:solid black 1px;">
</div>
</div>
</body>
</html>
改進您的addMarker()
函數,因為它可以在addMarker()
顯示單擊標記的lat-lng值:
function addMarker(latLng, map) {
var marker = new google.maps.Marker({
position: latLng,
map: map,
draggable: true, // enables drag & drop
animation: google.maps.Animation.DROP
});
var contentString = latLng.lat() + " - " + latLng.lng();
var infowindow = new google.maps.InfoWindow({
content: contentString
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map,marker);
});
}
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