通过webservices和flex交互取得数据库中的gps坐标动态显示在地图上。
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1.建立数据库：
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2.建立webservices:
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.OleDb;
using System.Data;
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[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
// [System.Web.Script.Services.ScriptService]
public class Service : System.Web.Services.WebService
{
??? public Service () {
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???????//如果使用设计的组件，请取消注释以下行
??????? //InitializeComponent();
??? }
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??? [WebMethod]
??? public string HelloWorld() {
??????? return “Hello World”;
??? }
??? [WebMethod]
??? public string GetGPS()
??? {
??????? DataSet myDS;
??????? string strtemp = string.Empty;
??????? string myConStr =@”Provider=Microsoft.ACE.OLEDB.12.0;DataSource=D:databaseforgpsDatabase1.accdb;”;
??????? OleDbConnection myCon = newOleDbConnection(myConStr);
??????? try?? //异常处理语句
??????? {
???????????myCon.Open();
??????????? stringcomStr = “Select * from gps”;
???????????OleDbDataAdapter myAD = new OleDbDataAdapter(comStr,myCon);
???????????? myDS =new DataSet();
???????????myAD.Fill(myDS,“gps”);
??????? }
??????? catch (OleDbException oe)
??????? {
??????????? throw oe;
??????? }
??????? finally
??????? {
??????????? //如果Connection是打开的，则关闭
??????????? if(myCon.State == ConnectionState.Open)
???????????????myCon.Close();
??????? }
??????? for (int i = 0; i <myDS.Tables[0].Rows.Count; i++)
??????? {
??????????? strtemp +=myDS.Tables[0].Rows[i]["X"].ToString() + “,” +myDS.Tables[0].Rows[i]["Y"].ToString()+”/”;
??????? }
??????? return strtemp;
??? }
???
}
3.编写flex代码：
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<?xml version=”1.0″ encoding=”utf-8″?>
<s:Application xmlns:fx=”http://ns.adobe.com/mxml/2009”
????? xmlns:s=”library://ns.adobe.com/flex/spark”
????? xmlns:mx=”library://ns.adobe.com/flex/mx”xmlns:supportClasses=”com.esri.ags.skins.supportClasses.*” minWidth=”955″minHeight=”600″ xmlns:esri=”http://www.esri.com/2008/ags“
????? initialize=”init()”
????? >????
?<fx:Script>
??<![CDATA[
???import com.esri.ags.Graphic;
???import com.esri.ags.SpatialReference;
???importcom.esri.ags.components.supportClasses.InfoSymbolWindow;
???import com.esri.ags.geometry.MapPoint;
???import com.esri.ags.geometry.Polyline;
???import com.esri.ags.layers.GraphicsLayer;
???import com.esri.ags.symbols.InfoSymbol;
???import com.esri.ags.symbols.SimpleLineSymbol;
???import com.esri.ags.symbols.SimpleMarkerSymbol;
???import com.esri.ags.symbols.Symbol;
???
???import mx.controls.Alert;
???import mx.rpc.events.FaultEvent;
???import mx.rpc.events.ResultEvent;
???import mx.rpc.soap.WebService;
???private var arr:Array=new Array();
???private var arr2:Array = new Array();
???private var polyine:Polyline=new Polyline();
???private var graphicsLayer:GraphicsLayer=new GraphicsLayer();
???private var graphicsLayertxt:GraphicsLayer=newGraphicsLayer();
???private var grahpic:Graphic=new Graphic();
???private var grahpictxt:Graphic=new Graphic();
???private var strws:String=new String();
???
???private function init():void
???{
????graphicsLayer.add(grahpic);
????Map.addLayer(graphicsLayer);
????graphicsLayertxt.add(grahpictxt);
????Map.addLayer(graphicsLayertxt);
???}?????
???private function PlayPoint(e:MouseEvent):void
???{
?????? var ws:WebService = new?WebService();
????ws.loadWSDL("http://localhost/gps/Service.asmx?wsdl");
????ws.addEventListener(FaultEvent.FAULT,onFAULT);
????ws.addEventListener(ResultEvent.RESULT,onRESULT);
????ws.GetGPS();
????
???}
???private function PlayLine(e:MouseEvent):void
???{
????
????polyine=new Polyline();
????var i:int=0;
????var timer:Timer = new Timer(1000,arr.length-1);
????timer.addEventListener(TimerEvent.TIMER,TimerMethod);
????timer.start();
????function TimerMethod(event:TimerEvent):void
????{
?????var mps:Array=new Array;
?????var mpStat:MapPoint=arr[i] as MapPoint;
?????var mpEnd:MapPoint=arr[i+1] as MapPoint;
?????mps.push(mpStat);
?????mps.push(mpEnd);
?????polyine.addPath(mps);
???????
?????grahpic=new Graphic(polyine,sls);
?????
?????graphicsLayer.add(grahpic);
?????i=i+1;
????}
???}
???internal function onFAULT(evt:FaultEvent):void
???{
????? Alert.show(evt.fault.faultDetail.toString());
???}
???internal function onRESULT(evt:ResultEvent):void
???{
????? //Alert.show(evt.result.toString());
????strws=evt.result.toString();
????arr2=strws.split(“/”);
????for(var j:int=0;j<arr2.length-1;j++)
?????? {
?????varx:String=arr2[j].toString().substr(0,arr2[j].toString().indexOf(“,”));
?????vary:String=arr2[j].toString().substr(arr2[j].toString().indexOf(“,”)+1,arr2[j].toString().length-x.length);
?????var X:Number = Number(x);
?????var Y:Number = Number(y);
?????var pt:MapPoint = new MapPoint(X,Y,newSpatialReference(5326));
?????arr.push(pt);
?????//Alert.show(Y.toString());
????
????}
????
????graphicsLayer.clear();
????var i:int=0;
????var timer:Timer = new Timer(1000,arr.length-1);
????var tmp:MapPoint=arr[i] as MapPoint;
????Map.zoom(-10,tmp);
????timer.addEventListener(TimerEvent.TIMER,TimerMethod);
????timer.start();
????function TimerMethod(event:TimerEvent):void
????{
?????var mps:Array=new Array;
?????var mpStat:MapPoint=arr[i] as MapPoint;
?????
?????
?????grahpic=new Graphic(mpStat,sps);
?????var dt:Date = new Date();
?????
?????txts.text=”xxx”+” 于：”+dt.fullYear.toString()+”-”+(dt.month+1).toString()+”-”+dt.date.toString()+”“+dt.hours.toString()+”:”+dt.minutes.toString()+”:”+dt.seconds.toString();
?????grahpictxt = new Graphic(mpStat,txts);
?????graphicsLayertxt.add(grahpictxt);
?????graphicsLayer.add(grahpic);
?????Map.centerAt(mpStat);
?????i=i+1;
????}
?????
???}
?????
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??]]>
?</fx:Script>
?<fx:Declarations>
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??<!– 将非可视元素（例如服务、值对象）放在此处 –>
??<!–<s:WebService id=”ws” wsdl=”http://localhost/gps/Service.asmx?wsdl“? useProxy=”false”>
???<s:operation name=”GetGPS” fault=”">
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???</s:operation>
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??</s:WebService>–>
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??<esri:SimpleLineSymbolid=”sls”
????????? width=”3″
????????? color=”0x00FF00″/>
??<esri:SimpleMarkerSymbol id=”sms”
???????? color=”0x00FF00″
???????? size=”12″
???????? style=”square”/>
??<esri:PictureMarkerSymbol id=”sps” source=”http://localhost/Red_glow.swf“? width=”20″ height=”20″ />
??<esri:TextSymbol id=”txts” backgroundColor=”0x00FF00″?color=”0xFF0000″/>
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?</fx:Declarations>
?<esri:Map id=”Map” >
??<esri:ArcGISTiledMapServiceLayer
???url=”http://cache1.arcgisonline.cn/ArcGIS/rest/services/ChinaCities_Community_BaseMap_ENG/ShenYang_Community_BaseMap_ENG/MapServer”/>
??<!–<esri:ArcGISDynamicMapServiceLayer url=”http://218.60.144.97:8080/RemoteRest/services/LN_SL/MapServer”/>–>
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?</esri:Map>
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?<mx:ControlBar? width=”100%” top=”0″ left=”0″ paddingTop=”0″paddingBottom=”0″?? horizontalAlign=”left” >
??<mx:Button label=”开始点轨迹”? width=”100″ fontSize=”12″click=”PlayPoint(event)”/>
??<mx:Button label=”开始线轨迹”? width=”100″ fontSize=”12″click=”PlayLine(event)”/>
?</mx:ControlBar>
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? </s:Application>
