C# 呼叫百度地圖web服務API
阿新 • • 發佈：2019-01-10
2.為了能與JS互動，首先引入using System.Security.Permissions；
在名稱空間裡新增：
[PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
[System.Runtime.InteropServices.ComVisibleAttribute(true)] 3.初始化webBrowser元件
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.獲取座標
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 ="當前座標："+ dou_lng.ToString("F5") + "," + dou_lat.ToString("F5"); } } catch (Exception ee) { MessageBox.Show(ee.Message); } }
5.一些方法的呼叫
1. webBrowser1.Document.InvokeScript("drawRec");//畫矩形
2.webBrowser1.Document.InvokeScript("drawCircle");//畫圓形
3.webBrowser1.Document.InvokeScript("openGetDistance");//測距
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6.百度提供的DEMO
<!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> <!--載入滑鼠測距工具--> <script src="DistanceTool_min.js" type="text/javascript"></script> <!--載入滑鼠繪製工具--> <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()); //新增比例尺控制元件(左下角顯示的比例尺控制元件) map.addControl(new BMap.OverviewMapControl());// 縮圖控制元件 var ctrl_nav = new BMap.NavigationControl({ anchor: BMAP_ANCHOR_TOP_LEFT, type: BMAP_NAVIGATION_CONTROL_LARGE }); map.addControl(ctrl_nav);//新增標準地圖控制元件(左上角的放大縮小左右拖拽控制元件) map.enableDragging(); //啟用地圖拖拽事件，預設啟用(可不寫) map.enableScrollWheelZoom(); //啟用地圖滾輪放大縮小 map.enableDoubleClickZoom(); //啟用滑鼠雙擊放大，預設啟用(可不寫) map.enableKeyboard(); //啟用鍵盤上下左右鍵移動地圖 map.enableContinuousZoom(); // 開啟連續縮放效果 map.enableInertialDragging(); // 開啟慣性拖拽效果 //實時顯示地圖座標 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; } } //實時顯示地圖座標 end //測量距離 strat function openGetDistance() { var myDis=new BMapLib.DistanceTool(map);//map為上面已經初始化好的地圖例項 myDis.open(); } //測量距離 end //左右擊滑鼠給地圖上放marker strat 放標註，並且將JS的資料傳送給WINFORM function PUTANDSEND() { //右鍵標記 map.addEventListener("rightclick", putAndsend); //左鍵標記 //map.addEventListener("click", putAndsend); } var marker_num = 0; function putAndsend(e) { //放標註 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 }); // 建立標註 map.addOverlay(marker); // 將標註新增到地圖中 marker_num++;//標註索引，這個是個全域性變數 var whichCar=window.external.setWhichCar(); var label=new BMap.Label(whichCar+"號車-座標"+marker_num+":"+ "("+e.point.lng+","+e.point.lat+")",{offset:new BMap.Size(20,-10)}); marker.setLabel(label); //給WINFORM傳值 window.external.PutIntotextBox(marker_num,whichCar,e.point.lng,e.point.lat); } //左右擊滑鼠給地圖上放marker end //在地圖上畫軌跡 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) {//偶數索引存經度，奇數存維度 PointArr.push(new BMap.Point(Array[i],Array[i+1])); } var polyline = new BMap.Polyline(PointArr, {strokeColor:"blue", strokeWeight:6, strokeOpacity:0.5}); //定義折線 map.addOverlay(polyline); window.external.ClearRows_num();//重置窗體計數器 } //在地圖上畫軌跡 end //在地圖上畫圓形或者方形 strat // 編寫自定義函式，建立標註 function addMarker(point) { var myIcon = new BMap.Icon("png-0003.png", new BMap.Size(24, 24)); var marker = new BMap.Marker(point, { icon: myIcon }); // 建立標註 map.addOverlay(marker); // 將標註新增到地圖中 } var overlays = []; var complete=function(e) { overlays.push(e.overlay); if (e.drawingMode == BMAP_DRAWING_CIRCLE) { //隨便賦值，重新整理一遍資料庫(此方法只為演示，實際中要另考慮演算法) var test= window.external.SearchAllCars(0); var circle_radius=e.overlay.getRadius();//半徑 //圓心 var circle_point=new BMap.Point(e.overlay.getCenter().lng,e.overlay.getCenter().lat); //從WINFORM裡取出資料 var dangerCars=[]; var pointlen=window.external.GetdangerNum(); for(var k=0;k<=pointlen-1;k++) { dangerCars.push(window.external.SearchAllCars(k)); } var BMappoints=[];//建立百度地圖介面規定的陣列 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]);//呼叫新增標註版本V3.0 var myIcon = new BMap.Icon("png-0003.png", new BMap.Size(24, 24)); var marker1 = new BMap.Marker(BMappoints[i], { icon: myIcon }); // 建立標註 map.addOverlay(marker1); // 將標註新增到地圖中 } } } }; //線條樣式 var styleOptions = { strokeColor:"blue", //邊線顏色。 fillColor:"blue", //填充顏色。當引數為空時，圓形將沒有填充效果。 strokeWeight: 3, //邊線的寬度，以畫素為單位。 strokeOpacity: 1, //邊線透明度，取值範圍0 - 1。 fillOpacity: 0.3, //填充的透明度，取值範圍0 - 1。 strokeStyle: 'solid' //邊線的樣式，solid或dashed。 } //例項化滑鼠繪製工具 var drawingManager = new BMapLib.DrawingManager(map, { isOpen: true, //是否開啟繪製模式 enableDrawingTool: true, //是否顯示工具欄 drawingToolOptions: { anchor: BMAP_ANCHOR_TOP_RIGHT, //位置 offset: new BMap.Size(5, 5), //偏離值 scale: 0.8, //工具欄縮放比例 drawingTypes : [ BMAP_DRAWING_CIRCLE, BMAP_DRAWING_RECTANGLE ] }, circleOptions: styleOptions, //圓的樣式 rectangleOptions: styleOptions //矩形的樣式 }); //新增滑鼠繪製工具監聽事件，用於獲取繪製結果 drawingManager.addEventListener('overlaycomplete', complete); //回撥獲得覆蓋物資訊，未使用該版本 var overlaycomplete = function (e) { overlays.push(e.overlay); 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 }); // 建立標註 map.addOverlay(marker1); // 將標註新增到地圖中 } } alert(result); } if (e.drawingMode == BMAP_DRAWING_POLYLINE || e.drawingMode == BMAP_DRAWING_POLYGON || e.drawingMode == BMAP_DRAWING_RECTANGLE) { result += ' 所畫的點個數：' + e.overlay.getPath()[1].lng; alert(result); } }; //drawingManager.enableCalculate(); //----------------------公用方法，用元素id獲取元素的值------------------- function $(id){ return document.getElementById(id); } //------------------畫矩形，讓WINFORM呼叫--------------- function drawRec(){ drawingManager.setDrawingMode(BMAP_DRAWING_RECTANGLE);} //------------------畫圓，讓WINFORM呼叫---------------- function drawCircle(){ drawingManager.setDrawingMode(BMAP_DRAWING_CIRCLE);} //------------------清除所有已畫圖形，讓WINFORM呼叫-------------------- function clearAll() { for(var i = 0; i < overlays.length; i++){ map.removeOverlay(overlays[i]); } overlays.length = 0 } //在地圖上畫圓形或者方形 end </script>