该范例程序会演示如何对地图进行移动、放大、缩小、刷新、清除地图缓存操作，以及如何显示地图瓦片的网格信息。
注意：太乐地图.NET控件 名称统一命名为：MapControl
范例运行后界面如下图所示：
移动
/// <summary> /// 移动地图 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, System.EventArgs e) { MapControl.ToolBar = MapToolBar.Drag; } |
放大
/// <summary> /// 放大地图 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button2_Click(object sender, System.EventArgs e) { MapControl.Zoom += 1; } |
缩小
/// <summary> /// 缩小地图 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button3_Click(object sender, System.EventArgs e) { MapControl.Zoom -= 1; } |
刷新
/// <summary> /// 刷新地图 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button4_Click(object sender, System.EventArgs e) { MapControl.ReloadMap(); } |
清除缓存
/// <summary> /// 清除地图缓存 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button5_Click(object sender, System.EventArgs e) { MapControl.Manager.CancelTileCaching(); MapControl.Manager.MemoryCache.Clear(); var pcount = MapControl.Manager.PrimaryCache.DeleteOlderThan(DateTime.Now, MapControl.MapProvider.DbId); if (null != MapControl.Manager.SecondaryCache) { var scount = MapControl.Manager.SecondaryCache.DeleteOlderThan(DateTime.Now, MapControl.MapProvider.DbId); } MapControl.Manager.StartTileCaching(); MapControl.ReloadMap(); MessageBox.Show(String.Format("共清除地图缓存{0}条", pcount)); } |
显示网格
/// <summary> /// 显示地图瓦片的网格信息 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void checkBox1_CheckedChanged(object sender, System.EventArgs e) { MapControl.ShowTileGridLines = checkBox1.Checked; } |