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css - asp.net 页面中的谷歌地图

转载 作者:行者123 更新时间:2023-11-28 07:41:19 25 4
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我试图在我的 vb.net 页面中加载谷歌地图,但 map 没有显示在页面上。知道这里出了什么问题吗?

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="GoogleMap.aspx.vb" Inherits="GDemo.GoogleMap" %>

<!DOCTYPE html>

<html lang="en">
<head runat="server">
<title></title>

<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
#panel {
position: absolute;
top: 5px;
left: 50%;
margin-left: -180px;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
}
</style>

<script src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>

<script>
var geocoder;
var map;
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var mapOptions = {
zoom: 8,
center: latlng
}
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
}

window.onload = initialize;

function codeAddress() {
var address = document.getElementById('address').value;
geocoder.geocode({ 'address': address }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location
});
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}

google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body >
<form id="form1" runat="server">
<div id="panel">
<input id="address" type="textbox" value="Sydney, NSW">
<input type="button" value="Geocode" onclick="codeAddress()">
</div>
<div id="map-canvas"></div>
</form>
</body>
</html>

最佳答案

当您在 CSS 中使用百分比值时,特定元素的父元素需要设置特定属性(在本例中为 height),否则浏览器无法计算属性(property)。

#map-canvas 的父元素是 form#form1 ,它没有高度。

例如这会起作用:

 html, body, form#form1, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}

使用地理编码响应填充输入的示例:

        function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var mapOptions = {
zoom: 8,
center: latlng
}
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
}



function codeAddress() {
var address = document.getElementById('address').value;
geocoder.geocode({ 'address': address }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location
});
document.getElementById('form1').latlng.value=
results[0].geometry.location.toUrlValue();
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}

google.maps.event.addDomListener(window, 'load', initialize);
html, body, form, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
#panel {
position: absolute;
top: 5px;
left: 50%;
margin-left: -180px;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
}
<script src="https://maps.googleapis.com/maps/api/js?v=3"></script>
<form id="form1" runat="server">
<div id="panel">
<input id="address" type="textbox" value="Sydney, NSW">
<input type="button" value="Geocode" onclick="codeAddress()">
<input name="latlng" />
</div>
<div id="map-canvas"></div>
</form>

关于css - asp.net 页面中的谷歌地图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30935130/

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