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C# 调用百度地图web服务API

2015-04-28 17:06 381 查看
1.关于百度提供的接口中的方法的实用，这里有很多官方提供的DEMO（http://developer.baidu.com/map/jshome.htm).

2.为了能与JS交互，首先引入using System.Security.Permissions；

                在命名空间里添加：

[PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
[System.Runtime.InteropServices.ComVisibleAttribute(true)]

3.初始化webBrowser组件

private void Form1_Load(object sender, EventArgs e)
{
string str_url = Application.StartupPath + "\\IndexMap.html";
Uri url = new Uri(str_url);
webBrowser1.Url = url;
webBrowser1.ObjectForScripting = this;
timer1.Enabled = true;
}

4.获取坐标

private void timer1_Tick(object sender, EventArgs e)
{
try
{
string tag_lng = webBrowser1.Document.GetElementById("mouselng").InnerText;
string tag_lat = webBrowser1.Document.GetElementById("mouselat").InnerText;
double dou_lng, dou_lat;
if (double.TryParse(tag_lng, out dou_lng) && double.TryParse(tag_lat, out dou_lat))
{
this.toolStripStatusLabel1.Text ="当前坐标："+ dou_lng.ToString("F5") + "," + dou_lat.ToString("F5");
}
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
}

5.一些方法的调用

            1. webBrowser1.Document.InvokeScript("drawRec");//画矩形

            2.webBrowser1.Document.InvokeScript("drawCircle");//画圆形

            3.webBrowser1.Document.InvokeScript("openGetDistance");//测距

            .........

            .........

6.百度提供的DEMO

关于更详细的，可以参考：http://blog.csdn.net/kkkkkxiaofei/article/details/8645856

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Hello Map</title>
<script type="text/javascript"src="http://api.map.baidu.com/api?key=59db371659c04947a1ff044e80565718&v=1.4&services=true">
</script>
<!--加载鼠标测距工具-->
<script src="DistanceTool_min.js" type="text/javascript"></script>
<!--加载鼠标绘制工具-->
<script type="text/javascript" src="DrawingManager_min.js"></script>
<link rel="stylesheet" href="DrawingManager_min.css" />

</head>
<body>
<div id="mouselng" style="visibility:hidden"></div>
<div id="mouselat" style="visibility:hidden"></div>
<div style="width:1000px;height:600px;border:1px solid gray" id="container">
</div>
</body>
</html>
<script type="text/javascript">
var map = new BMap.Map("container");
map.centerAndZoom(new BMap.Point(108.876433, 36.269395), 5);
map.addControl(new BMap.ScaleControl()); //添加比例尺控件(左下角显示的比例尺控件)
map.addControl(new BMap.OverviewMapControl());// 缩略图控件
var ctrl_nav = new BMap.NavigationControl({ anchor: BMAP_ANCHOR_TOP_LEFT, type: BMAP_NAVIGATION_CONTROL_LARGE });
map.addControl(ctrl_nav);//添加标准地图控件(左上角的放大缩小左右拖拽控件)

map.enableDragging(); //启用地图拖拽事件，默认启用(可不写)
map.enableScrollWheelZoom(); //启用地图滚轮放大缩小
map.enableDoubleClickZoom(); //启用鼠标双击放大，默认启用(可不写)
map.enableKeyboard(); //启用键盘上下左右键移动地图
map.enableContinuousZoom();   // 开启连续缩放效果
map.enableInertialDragging(); // 开启惯性拖拽效果

//实时显示地图坐标 strat
map.addEventListener("mousemove",GetlngAndlat);
function GetlngAndlat(e) {
if(e.point.lng!=null)
{
document.getElementById("mouselng").innerHTML=e.point.lng;
document.getElementById("mouselat").innerHTML=e.point.lat;
}
}
//实时显示地图坐标 end
//测量距离 strat
function openGetDistance() {

var myDis=new BMapLib.DistanceTool(map);//map为上面已经初始化好的地图实例
myDis.open();
}
//测量距离 end

//左右击鼠标给地图上放marker strat 放标注，并且将JS的数据传送给WINFORM
function PUTANDSEND() {
//右键标记
map.addEventListener("rightclick", putAndsend);
//左键标记
//map.addEventListener("click", putAndsend);
}
var marker_num = 0;
function putAndsend(e)
{
//放标注
var p1=new BMap.Point(e.point.lng,e.point.lat);
var myIcon = new BMap.Icon("png-0003.png", new BMap.Size(24, 24));
var marker = new BMap.Marker(p1, { icon: myIcon });  // 创建标注
map.addOverlay(marker);              // 将标注添加到地图中

marker_num++;//标注索引，这个是个全局变量
var whichCar=window.external.setWhichCar();
var label=new BMap.Label(whichCar+"号车-坐标"+marker_num+":"+
"("+e.point.lng+","+e.point.lat+")",{offset:new BMap.Size(20,-10)});
marker.setLabel(label);
//给WINFORM传值
window.external.PutIntotextBox(marker_num,whichCar,e.point.lng,e.point.lat);

}
//左右击鼠标给地图上放marker end

//在地图上画轨迹 strat
function DrawOrit1()
{
var Array=[];
var total_num= window.external.getRowsNumber();
for(var i=0;i<=2*total_num-1;i++)
{
Array.push(window.external.Getpoints(i));
}

var PointArr=[];
for(var i=0;i<=Array.length-1;i+=2)
{//偶数索引存经度，奇数存维度
PointArr.push(new BMap.Point(Array[i],Array[i+1]));
}
var polyline = new BMap.Polyline(PointArr, {strokeColor:"blue", strokeWeight:6,   strokeOpacity:0.5});  //定义折线
map.addOverlay(polyline);
window.external.ClearRows_num();//重置窗体计数器
}
//在地图上画轨迹 end

//在地图上画圆形或者方形 strat
// 编写自定义函数，创建标注
function addMarker(point) {
var myIcon = new BMap.Icon("png-0003.png", new BMap.Size(24, 24));
var marker = new BMap.Marker(point, { icon: myIcon });  // 创建标注
map.addOverlay(marker);              // 将标注添加到地图中
}

var overlays = [];
var complete=function(e)
{
overlays.push(e.overlay);
if (e.drawingMode == BMAP_DRAWING_CIRCLE)
{
//随便赋值，刷新一遍数据库(此方法只为演示，实际中要另考虑算法)
var test=  window.external.SearchAllCars(0);

var circle_radius=e.overlay.getRadius();//半径
//圆心
var circle_point=new BMap.Point(e.overlay.getCenter().lng,e.overlay.getCenter().lat);
//从WINFORM里取出数据
var dangerCars=[];
var pointlen=window.external.GetdangerNum();

for(var k=0;k<=pointlen-1;k++)
{
dangerCars.push(window.external.SearchAllCars(k));
}
var BMappoints=[];//创建百度地图接口规定的数组
for(var j=0;j<=dangerCars.length-1;j+=2)
{
BMappoints.push(new BMap.Point(dangerCars[j],dangerCars[j+1]));
}

for(var i=0;i<=BMappoints.length-1;i++)
{
if(map.getDistance(circle_point,BMappoints[i])<=circle_radius)
{
//AddMarker(BMappoints[i]);//调用添加标注版本V3.0
var myIcon = new BMap.Icon("png-0003.png", new BMap.Size(24, 24));
var marker1 = new BMap.Marker(BMappoints[i], { icon: myIcon });  // 创建标注
map.addOverlay(marker1);              // 将标注添加到地图中
}
}

}

};
//线条样式
var styleOptions = {
strokeColor:"blue",    //边线颜色。
fillColor:"blue",      //填充颜色。当参数为空时，圆形将没有填充效果。
strokeWeight: 3,       //边线的宽度，以像素为单位。
strokeOpacity: 1,    //边线透明度，取值范围0 - 1。
fillOpacity: 0.3,      //填充的透明度，取值范围0 - 1。
strokeStyle: 'solid' //边线的样式，solid或dashed。
}
//实例化鼠标绘制工具
var drawingManager = new BMapLib.DrawingManager(map, {
isOpen: true, //是否开启绘制模式
enableDrawingTool: true, //是否显示工具栏
drawingToolOptions: {
anchor: BMAP_ANCHOR_TOP_RIGHT, //位置
offset: new BMap.Size(5, 5), //偏离值
scale: 0.8, //工具栏缩放比例
drawingTypes : [
BMAP_DRAWING_CIRCLE,
BMAP_DRAWING_RECTANGLE
]

},
circleOptions: styleOptions, //圆的样式
rectangleOptions: styleOptions //矩形的样式
});

//添加鼠标绘制工具监听事件，用于获取绘制结果
drawingManager.addEventListener('overlaycomplete', complete);
//回调获得覆盖物信息，未使用该版本
var overlaycomplete = function (e) {
overlays.push(e.overl
b2de
ay);
var result = "";

result += e.drawingMode + ":";

if (e.drawingMode == BMAP_DRAWING_CIRCLE) {

var circle_radius = e.overlay.getRadius();
var circle_point = new BMap.Point(e.overlay.getCenter().lng, e.overlay.getCenter().lat);
alert(map.getDistance(circle_point, tests[1]));
for (var i = 0; i < 3; i++) {
if (map.getDistance(circle_point, tests[i]) <= circle_radius) {
//AddMarker(tests[i]);
var myIcon = new BMap.Icon("png-0003.png", new BMap.Size(24, 24));
var marker1 = new BMap.Marker(tests[i], { icon: myIcon });  // 创建标注
map.addOverlay(marker1);              // 将标注添加到地图中
}
}
alert(result);
}
if (e.drawingMode == BMAP_DRAWING_POLYLINE || e.drawingMode == BMAP_DRAWING_POLYGON || e.drawingMode == BMAP_DRAWING_RECTANGLE) {
result += ' 所画的点个数：' + e.overlay.getPath()[1].lng;
alert(result);
}
};

//drawingManager.enableCalculate();
//----------------------公用方法，用元素id获取元素的值-------------------
function $(id){
return document.getElementById(id);
}

//------------------画矩形，让WINFORM调用---------------
function drawRec(){
drawingManager.setDrawingMode(BMAP_DRAWING_RECTANGLE);}
//------------------画圆，让WINFORM调用----------------
function drawCircle(){
drawingManager.setDrawingMode(BMAP_DRAWING_CIRCLE);}
//------------------清除所有已画图形，让WINFORM调用--------------------
function clearAll() {
for(var i = 0; i < overlays.length; i++){
map.removeOverlay(overlays[i]);
}
overlays.length = 0
}
//在地图上画圆形或者方形 end

</script>



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