Mapxtreme2008 Asp.net實現小車移動（軌跡回放）

在介面上添加Timer控制項，然後在UpdatePanel1的Trigger中添加Timer的Tick（實現定時局部重新整理地圖）；設定間隔時間，在事件中添加如下代碼：

 protected void Timer1_Tick(object sender, EventArgs e)
    {        /*下面代碼可實現點的動態移動，在原來點的基礎上經度每次位移0.5
        Catalog cat = MapInfo.Engine.Session.Current.Catalog;

        MapInfo.Data.Table tbl = MapInfo.Engine.Session.Current.Catalog.GetTable("Animation");
        if (tbl != null)
        {
            //更新點的位置
            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();
          */

//將圖元移動到指定位置，即實現軌跡回放

//首先在介面設計時，在ListBox1與ListBox2中添加8個點的座標，在定時器中實現動態移動到這八個點的位置
        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);
            }            //更新點的位置
            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;
            }
        }