关键性代码整理

            //利用ＡＯ将平面坐标转换成大地坐标
            ISpatialReferenceFactory2 pfactory = new SpatialReferenceEnvironmentClass();
            IProjectedCoordinateSystem flatref = pfactory.CreateProjectedCoordinateSystem(54013);
            IGeographicCoordinateSystem earthref = pfactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_NAD1983);
            IPoint pt = new PointClass();
            double x = Convert.ToDouble(txtX.Text);
            double y = Convert.ToDouble(txtY.Text);
            pt.PutCoords(x, y);
            IGeometry geo = (IGeometry)pt;
            geo.SpatialReference = flatref;
            geo.Project(earthref);

            plan.FlyTo(pt.X, pt.Y, 1000, 10000, 0, 0, "FlyToLocation");
            MessageBox.Show(pt.X + "   " + pt.Y);

Skyline
//通过对象名称对对象进行定位
            int itemID = infoTree.FindItem("[Free Hand Drawings]\\Triplane");
            string objID = infoTree.GetTerraObjectID(itemID);
            plan.FlyToObject(objID, ActionCode.AC_FLYTO);

//根据数据库中内容生成二级目录
            OleDbConnection conn=new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\\Data.mdb");
            conn.Open();

            OleDbDataAdapter oda=new OleDbDataAdapter("select * from Type",conn);
            DataSet dsType=new DataSet();
            oda.Fill(dsType);
            DataView dvType=dsType.Tables[0].DefaultView;
            
            foreach(DataRowView drv in dvType)
            {
                TreeNode node=new TreeNode();
                node.Text=drv["Name"].ToString();

                int ID=(int)drv["ID"];                
                oda.SelectCommand.CommandText="select * from Content where TypeID="+ID;
                DataSet dsContent=new DataSet();
                oda.Fill(dsContent);
                if (dsContent.Tables[0].Rows.Count > 0)
                {
                    DataView dvContent = dsContent.Tables[0].DefaultView;
                    foreach (DataRowView i_drv in dvContent)
                    {
                        TreeNode i_node = new TreeNode();
                        
                        i_node.Text = i_drv["Content"].ToString();
                        node.Nodes.Add(i_node);
                    }
                }
                trvContent.Nodes.Add(node);