Mapxtreme2008 Asp.net实现小车移动（轨迹回放）

在界面上添加Timer控件，然后在UpdatePanel1的Trigger中添加Timer的Tick（实现定时局部刷新地图）；设定间隔时间，在事件中添加如下代码：

 protected void Timer1_Tick(object sender, EventArgs e)    {        /*下面代码可实现点的动态移动，在原来点的基础上经度每次偏移0.5        Catalog cat = MapInfo.Engine.Session.Current.Catalog;

        MapInfo.Data.Table tbl = MapInfo.Engine.Session.Current.Catalog.GetTable("Animation");        if (tbl != null)        {            //更新点的位置            tbl.BeginAccess(MapInfo.Data.TableAccessMode.Write);            foreach (Feature fcar in tbl)            {                fcar.Geometry.GetGeometryEditor().OffsetByXY(0.5, 0, MapInfo.Geometry.DistanceUnit.Degree, MapInfo.Geometry.DistanceType.Spherical);                                fcar.Geometry.EditingComplete();                fcar.Update();            }            tbl.EndAccess();          */

//将图元移动到指定位置，即实现轨迹回放

//首先在界面设计时，在ListBox1与ListBox2中添加8个点的坐标，在定时器中实现动态移动到这八个点的位置        Catalog cat = MapInfo.Engine.Session.Current.Catalog;

        MapInfo.Data.Table tbl = MapInfo.Engine.Session.Current.Catalog.GetTable("Animation");        if (tbl != null)        {            int i = int.Parse(Label3.Text);            double dbLon = double.Parse(ListBox1.Items[i].Text);            double dbLat = double.Parse(ListBox2.Items[i].Text);            double dbLonOff, dbLatOff;            DPoint dpt = new DPoint(dbLon,dbLat);

            if (i == 0)            {                dbLonOff = dbLon - 118.2377;                dbLatOff = dbLat - 36.785;            }            else            {                dbLonOff = dbLon - double.Parse(ListBox1.Items[i-1].Text);                dbLatOff = dbLat - double.Parse(ListBox2.Items[i-1].Text);            }            //更新点的位置            tbl.BeginAccess(MapInfo.Data.TableAccessMode.Write);            Feature fcar = MapInfo.Engine.Session.Current.Catalog.SearchForFeature(tbl, MapInfo.Data.SearchInfoFactory.SearchWhere("Name='aaaa'"));            //fcar.Geometry.GetGeometryEditor().OffsetByXY(0.5, 0, MapInfo.Geometry.DistanceUnit.Degree, MapInfo.Geometry.DistanceType.Spherical);            fcar.Geometry.GetGeometryEditor().OffsetByXY(dbLonOff, dbLatOff, MapInfo.Geometry.DistanceUnit.Degree, MapInfo.Geometry.DistanceType.Spherical);            fcar.Geometry.EditingComplete();            fcar.Update();            tbl.EndAccess();            i++;            Label3.Text = i.ToString();            if (i >= 8)            {                Timer1.Enabled = false;            }        }