本文主要是介绍ArcGIS Api For Flex 动态画点和线（2），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
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。
1.建立数据库：
2.建立webservices:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.OleDb;
using System.Data;
[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 () {
//如果使用设计的组件，请取消注释以下行
//InitializeComponent();
}
[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：
<?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;
}
}
]]>
</fx:Script>
<fx:Declarations>
<!– 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=”">
</s:operation>
</s:WebService>–>
<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″/>
</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”/>–>
</esri:Map>
<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>
</s:Application>
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