AE三维点击查询(3D Identify)的实现(转）

AE三维点击查询(3D Identify)的实现,类似ArcGIS的Identify对话框
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Function: 三维点击查询 3D Identify
// Copyright ©  天下无双之dxcgis
// 2008-5-8  于岳麓山下。

主窗体中的代码：

        // 在主窗体中定义一个frmIdentify窗体类的对象
        frmIdentify m_frmIdentify = new frmIdentify();

        // SceneControl1的MouseDown 事件中添加代码
private void axSceneControl1_OnMouseDown(object sender, ISceneControlEvents_OnMouseDownEvent e)
        {
               //三维查询         
                axSceneControl1.SceneGraph.IsNavigating = false;
               
                IHit3DSet pHit3DSet;
                axSceneControl1.SceneGraph.LocateMultiple(axSceneControl1.SceneGraph.ActiveViewer,
                    e.x, e.y, esriScenePickMode.esriScenePickAll, false, out pHit3DSet);
                                
                pHit3DSet.OnePerLayer();
                if (pHit3DSet.Hits.Count == 0)
                {
                    MessageBox.Show("当前点未能查找到任何要素");
                    return;
                }
                IDisplay3D pDisplay3D = (IDisplay3D)axSceneControl1.Scene.SceneGraph;//用于高亮显示要素
                //显示信息窗体
                m_frmIdentify.listBox1.Items.Clear();
                m_frmIdentify.listView1.Items.Clear();
                m_frmIdentify.pHit3DSet = pHit3DSet;
                m_frmIdentify.pDisplay3D = pDisplay3D;
                m_frmIdentify.InitData();
                m_frmIdentify.Location = System.Windows.Forms.Cursor.Position; //获得当前鼠标的屏幕坐标
                m_frmIdentify.Show();
                m_frmIdentify.Focus();
    ｝



3D Identify 窗体（frmIdentify）的代码：

public partial class frmIdentify : Form
    {
        
        public IHit3DSet pHit3DSet;
        public IDisplay3D pDisplay3D;

        public frmIdentify()
        {
            InitializeComponent();
        }              
        private void frmIdentify_Load(object sender, EventArgs e)
        {
        }
        private void btnHide_Click(object sender, EventArgs e)
        {
            this.Hide();
        }
        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {                  
            listView1.Items.Clear();//消除 listView1 的内容
      IHit3D pHit3D = (IHit3D)pHit3DSet.Hits.get_Element(listBox1.SelectedIndex);
            IFeature pFeature = (IFeature)pHit3D.Object;
            for (int j = 0; j < pFeature.Fields.FieldCount; j++)
            {
                ListViewItem li = new ListViewItem();
                li.SubItems.Clear();
                li.SubItems[0].Text = pFeature.Fields.get_Field(j).Name;
                li.SubItems.Add(pFeature.get_Value(j).ToString());               
                listView1.Items.Add(li);
            }
            //pDisplay3D.AddFlashFeature(pFeature.Shape);
            pDisplay3D.FlashGeometry(pHit3D.Owner,pHit3D.Object);
        }

       //自己添加的方法，用以初始化窗体。
        public void InitData()
        {
            listBox1.Items.Clear();//消除 listBox1 的内容
            listView1.Items.Clear();//消除 listView1 的内容
            if (pHit3DSet == null)
                return;
            for (int i = 0; i < pHit3DSet.Hits.Count; )
            {
                IHit3D pHit3D = (IHit3D)pHit3DSet.Hits.get_Element(i);
                IPoint pPoint = pHit3D.Point;
                //if (pPoint.IsEmpty)
                //    return;
                ILayer pLayer = (ILayer)pHit3D.Owner;
                //判断是否为要素图层
         if (pLayer is IFeatureLayer)
                {
                    IFeature pFeature = (IFeature)pHit3D.Object;
                    listBox1.Items.Add(pLayer.Name);//在列表中添加图层名
                    //for (int j = 0; j < pFeature.Fields.FieldCount; j++)
                    //    strHits += "\n  ：" + pFeature.Fields.get_Field(j).Name + pFeature.get_Value(j).ToString();
                    pDisplay3D.AddFlashFeature(pFeature.Shape);
                    i++; //计数i加1
                }
                else
                {
                    //不是要素层就从pHit3DSet中删去,因删除后总数减1,计数i不加1
                    pHit3DSet.Hits.Remove(i);
                }
            }                     
            pDisplay3D.FlashFeatures();
        }
    }

 

转自ESRI官论坛的dxcGIS