C# · 12月 30, 2021

Windows下C#的GUI窗口程序中实现调用Google Map的实例

对谷歌地图操作使用的是WebBrowser控件,通过对javascript的操作来实现对谷歌地图的各种操作,所以首先要创建一个html文件,并赋给WebBrowser的URl:

<!DOCTYPE html> <html> <head> <Meta name=”viewport” content=”initial-scale=1.0,user-scalable=no” /> <Meta http-equiv=”content-type” content=”text/html; charset=UTF-8″/> <title>Google Maps</title> <link href=”http://code.google.com/apis/maps/documentation/javascript/examples/default.css” rel=”stylesheet” type=”text/css” /> <script type=”text/javascript” src=”http://maps.google.com/maps/api/js?sensor=false”></script> <script type=”text/javascript”> var map; function initialize() {//初始化 var myLatlng = new google.maps.LatLng( 34.259442,108.947071); var myOptions = { zoom: 10,center: myLatlng,mapTypeId: google.maps.MapTypeId.ROADMAP } map = new google.maps.Map(document.getElementById(“map_canvas”),myOptions); } function zoomIn(){//放大函数 var zoomLevel = map.getZoom(); if(zoomLevel < 21){ zoomLevel += 1; map.setZoom(zoomLevel); } } function zoomOut(){//缩小函数 var zoomLevel = map.getZoom(); if(zoomLevel > 0){ zoomLevel -= 1; map.setZoom(zoomLevel); } } function markLocation(x,y){//标记某个位置 var myLatlng = new google.maps.LatLng(x,y); map.setCenter(myLatlng); marker = new google.maps.Marker({ map: map,position: myLatlng,draggable:true,title:”纬度:”+x+” 经度:”+y }); } </script> </head> <body onload=”initialize()”> <div id=”map_canvas”></div> </body> </html>

操作地图的简单函数都写在javascript里
C#源文件如下

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace GoogleMapDemo { public partial class Form1 : Form { public Form1() { InitializeComponent(); string url = Application.StartupPath + “/map-simple.html”; webBrowser1.Url = new Uri(url);//指定url } private void toolStripButtonStart_Click(object sender,EventArgs e) { webBrowser1.Document.InvokeScript(“initialize”);//执行jiavascript } private void toolStripButtonZoomIn_Click(object sender,EventArgs e) { webBrowser1.Document.InvokeScript(“zoomIn”); } private void toolStripButtonZoomOut_Click(object sender,EventArgs e) { webBrowser1.Document.InvokeScript(“zoomOut”); } private void toolStripButtonMark_Click(object sender,EventArgs e) { object[] obj = { toolStripText@R_329_2419@1.Text,toolStripText@R_329_2419@2.Text }; webBrowser1.Document.InvokeScript(“markLocation”,obj); } } }

PS:如果只是想单纯地调用浏览器打开网页,可以这样:

private void lbllink_LinkClicked(object sender,LinkLabelLinkClickedEventArgs e) { //调用IE浏览器 System.Diagnostics.Process.Start(“iexplore.exe”,”http://www.google.cn”); //调用系统默认的浏览器 System.Diagnostics.Process.Start( “http://www.google.cn”); } private void lbllink_LinkClicked(object sender,LinkLabelLinkClickedEventArgs e) { //调用IE浏览器 System.Diagnostics.Process.Start(“iexplore.exe”,”http://www.google.cn”); //调用系统默认的浏览器 System.Diagnostics.Process.Start( “http://www.google.cn”); }