使用Asp.net C＃在谷歌地图中找到位置 [英] Location find in google map using Asp.net C#
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问题描述
我使用以下代码在Google地图上查找位置。我需要检查谷歌地图中是否存在该位置，然后进入下一页，其他明智的显示警报消息。如果位置存在，则将经纬度保存到数据库。如何检查输入的位置是否存在于谷歌地图中？并获得相应的经纬度？
I use following code to find location on google map . I need to check if the location exist in google map then proceed to next page , other wise display alert message. If location exist save latitude and longitude to database .How to check entered location exist in google map?. and get corresponding latitude and longitude?
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&libraries=places"></script>
<script>
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(-33.8688, 151.2195),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
var input = /** @type {HTMLInputElement} */(document.getElementById('searchTextField'));
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);
var infowindow = new google.maps.InfoWindow();
var marker = new google.maps.Marker({
map: map
});
google.maps.event.addListener(autocomplete, 'place_changed', function () {
infowindow.close();
marker.setVisible(false);
input.className = '';
var place = autocomplete.getPlace();
if (!place.geometry) {
// Inform the user that the place was not found and return.
input.className = 'notfound';
return;
}
// If the place has a geometry, then present it on a map.
if (place.geometry.viewport) {
map.fitBounds(place.geometry.viewport);
} else {
map.setCenter(place.geometry.location);
map.setZoom(17); // Why 17? Because it looks good.
}
marker.setIcon(/** @type {google.maps.Icon} */({
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(35, 35)
}));
marker.setPosition(place.geometry.location);
marker.setVisible(true);
var address = '';
if (place.address_components) {
address = [
(place.address_components[0] && place.address_components[0].short_name || ''),
(place.address_components[1] && place.address_components[1].short_name || ''),
(place.address_components[2] && place.address_components[2].short_name || '')
].join(' ');
}
infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
infowindow.open(map, marker);
});
// Sets a listener on a radio button to change the filter type on Places
// Autocomplete.
function setupClickListener(id, types) {
var radioButton = document.getElementById(id);
google.maps.event.addDomListener(radioButton, 'click', function () {
autocomplete.setTypes(types);
});
}
setupClickListener('changetype-all', []);
setupClickListener('changetype-establishment', ['establishment']);
setupClickListener('changetype-geocode', ['geocode']);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
<body>
<input id="searchTextField" type="text" size="50">
<div id="map-canvas" style="height:400px;width:400px;">
<asp:Button ID="Button1" runat="server" Text="Proceed"
onclick="Button1_Click" /> </body>
</div>
推荐答案
通过它： StakeOverflow [ ^ ]
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