你可能需要在Map 3D中通过程序把某块地图拉到屏幕中央来，下面通过程序的方式来实现这个功能。

这里有两种情况，如果你在Map 3D中通过Data Connect连接到了一下FDO数据源（SDF、SHP、Oracle Spatial等等），并把他们加入到了地图上，这时你可以使用AcMapMap.ZoomToExtent方法，他接受一个MgEnvelope对象。但如果你么有FDO数据源，那么你就得用AutoCAD API来做了。

下面是实现代码：

        [CommandMethod("ZoomCenter")]public void ZoomCenter(){Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;Database db = doc.Database;Editor ed = doc.Editor;Point3d centerPt;PromptPointOptions ppo = new PromptPointOptions("Click on map to zoom center:");PromptPointResult ppr = ed.GetPoint(ppo);if (ppr.Status == PromptStatus.OK){centerPt = ppr.Value;AcMapMap map = AcMapMap.GetCurrentMap();MgEnvelope mapExtent = map.GetMapExtent();//There are some FDO feature source connected if (!mapExtent.IsNull()){double centerX = mapExtent.LowerLeftCoordinate.X + mapExtent.Width / 2;double centerY = mapExtent.LowerLeftCoordinate.Y + mapExtent.Height / 2;ed.WriteMessage("center:" + centerX.ToString() + "," + centerY.ToString() + "\n");MgEnvelope newExtent = new MgEnvelope(centerPt.X - mapExtent.Width / 2,centerPt.Y - mapExtent.Height / 2,centerPt.X + mapExtent.Width / 2,centerPt.Y + mapExtent.Height / 2);map.ZoomToExtent(newExtent);}else{//no FDO data source, use AutoCAD APIusing (Transaction Tx = db.TransactionManager.StartTransaction()){ed.UpdateTiledViewportsInDatabase();ViewportTableRecord viewportTableRec = Tx.GetObject(ed.ActiveViewportId, OpenMode.ForWrite) as ViewportTableRecord;viewportTableRec.CenterPoint = new Point2d(centerPt.X, centerPt.Y);ed.UpdateTiledViewportsFromDatabase();Tx.Commit();}}}}