您的位置：首页 > Web前端 > JavaScript

ASP.NET Google Maps Javascript API V3 实战基础篇一路线查询

2010-11-15 16:15 281 查看

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Direction_Complex.aspx.cs"
Inherits="Samples.Services.Direction_Complex" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>路线查询</title>
<style type="text/css">
#maps
{
height: 450px;
}
</style>

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&language=zh-CN"></script>

<script language="javascript" type="text/javascript">
var map; //申明地图对象
var directionDisplay; //申明路线显示对象
var directionsService; //申明路线查询服务
var stepDisplay; //申明路线步骤对象
var markerArray = []; //申明标记数组
//地图初始化函数
function initialize() {
// Instantiate a directions service.
//创建路线查询服务实例
directionsService = new google.maps.DirectionsService();

// Create a map and center it on Manhattan.
var manhattan = new google.maps.LatLng(40.7711329, -73.9741874);
var myOptions = {
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: manhattan
}
map = new google.maps.Map(document.getElementById("maps"), myOptions);

// Create a renderer for directions and bind it to the map.
//创建一个路线呈现对象并绑定到地图
var rendererOptions = {
map: map
}
//实例化路线显示对象
directionsDisplay = new google.maps.DirectionsRenderer(rendererOptions)

// Instantiate an info window to hold step text.
//创建信息窗口实例来显示步骤信息
stepDisplay = new google.maps.InfoWindow();
calcRoute();
}
//计算路线函数
function calcRoute() {

// First, remove any existing markers from the map.
//首先删除所有的标记
for (i = 0; i < markerArray.length; i++) {
markerArray[i].setMap(null);
}

// Now, clear the array itself.
//清空标记数组
markerArray = [];

// Retrieve the start and end locations and create
// a DirectionsRequest using WALKING directions.
var start = document.getElementById("start").value;
var end = document.getElementById("end").value;
var request = {
origin: start,
destination: end,
travelMode: google.maps.DirectionsTravelMode.WALKING
};

// Route the directions and pass the response to a
// function to create markers for each step.
//根据计算出来的路线并调用步骤显示函数来创建标记
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
var warnings = document.getElementById("warnings_panel");
warnings.innerHTML = "<b>" + response.routes[0].warnings + "</b>";
directionsDisplay.setDirections(response);
showSteps(response);
}
});
}
//步骤显示函数
function showSteps(directionResult) {
// For each step, place a marker, and add the text to the marker's
// info window. Also attach the marker to an array so we
// can keep track of it and remove it when calculating new
// routes.
//获取步骤地址数组
var myRoute = directionResult.routes[0].legs[0];
//为每一个步骤地址创建标记
for (var i = 0; i < myRoute.steps.length; i++) {
var marker = new google.maps.Marker({
position: myRoute.steps[i].start_point,
map: map
});
//显示步骤信息
attachInstructionText(marker, myRoute.steps[i].instructions);
markerArray[i] = marker;
}
}
//显示步骤信息函数当点击标记时打开信息窗口并在其中显示步骤信息
function attachInstructionText(marker, text) {
google.maps.event.addListener(marker, 'click', function() {
// Open an info window when the marker is clicked on,
// containing the text of the step.
stepDisplay.setContent(text);
stepDisplay.open(map, marker);
});
}
//将地图初始化函数绑定到window的load事件
google.maps.event.addDomListener(window, "load", initialize);
</script>

</head>
<body>
<form id="form1" runat="server">
<div>
<b>Start: </b>
<select id="start" onchange="calcRoute();">
<option value="penn station, new york, ny">Penn Station</option>
<option value="grand central station, new york, ny">Grand Central Station</option>
<option value="625 8th Avenue New York NY 10018">Port Authority Bus Terminal</option>
<option value="staten island ferry terminal, new york, ny">Staten Island Ferry Terminal</option>
<option value="101 E 125th Street, New York, NY">Harlem - 125th St Station</option>
</select>
<b>End: </b>
<select id="end" onchange="calcRoute();">
<option value="260 Broadway New York NY 10007">City Hall</option>
<option value="W 49th St & 5th Ave, New York, NY 10020">Rockefeller Center</option>
<option value="moma, New York, NY">MOMA</option>
<option value="350 5th Ave, New York, NY, 10118">Empire State Building</option>
<option value="253 West 125th Street, New York, NY">Apollo Theatre</option>
<option value="1 Wall St, New York, NY">Wall St</option>
</select>
</div>
<div id="maps">
</div>
<div id="warnings_panel" style="width: 100%; height: 10%; text-align: center">
</div>
</form>
</body>
</html>

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航