delphi 调用百度地图api

时间:2021-09-02 04:53:36

一、调用javascript的方法

两种:

第一种:采用自编函数的方法

function ExecuteJavaScript(WebBrowser:TWebBrowser; Code: string):Variant;
var //发送脚本
Document:IHTMLDocument2;
Window:IHTMLWindow2;
begin
// execute javascript in webbrowser
Document:=WebBrowser.Document as IHTMLDocument2;
if not Assigned(Document) then Exit;
Window:=Document.parentWindow;
if not Assigned(Window) then Exit;
try
Result:=Window.execScript(Code,‘JavaScript‘);
except
on E:Exception do raise Exception.Create(‘Javascript error ‘+E.Message+‘ in: ‘#13#10+Code);
end;
end;

第二种:直接调用WebBrowser内置方法:

WebBrowser1.OleObject.document.parentWindow.方法名();

二、百度API的调用

制作一个HTML文件

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=你的秘钥"></script>
<title>百度地图测试</title>
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;}
</style>
</head>
<body>
<div> </div>

</body>
</html>


<script type="text/javascript">

function setcenter(areaname){ //设置新的地图中心

map.centerAndZoom(areaname,10);
}

var map = new BMap.Map("allmap"); //js 主程序,调起百度地图
var point = new BMap.Point(116.404, 39.915);
map.centerAndZoom(point,5);
map.enableScrollWheelZoom();

</script>

三、DELPHI 中的实现方法:

WebBrowser1.Navigate(ExtractFilePath(Application.ExeName)+‘bmap.html‘);

try
ExecuteJavaScript(WebBrowser1,‘setcenter("‘+CenterCityname+‘");‘);
except
on E:Exception do showmessage(E.Message);
end;

{

或者:

WebBrowser1.OleObject.document.parentWindow.setcenter(CenterCityname);

}

delphi 调用百度地图api