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  • 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 += "   :" + 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

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  • 原文地址:https://www.cnblogs.com/mingjiatang/p/3814852.html
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