AE基础(6)数据查询与选择

using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Ch0207
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Click(object sender, EventArgs e)
        {
            loadMapDocument();
        }

        int flag = 0;
        private void button1_Click(object sender, EventArgs e)
        {
            //点选
            flag = 1;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //圆选
            flag = 2;
        }

        private void button3_Click(object sender, EventArgs e)
        {//矩形
            flag = 3;
        }

        private void button4_Click(object sender, EventArgs e)
        {//多边形
            flag = 4;
        }

        private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
        {
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair;
            IGeometry geometry=null;
            switch (flag)
            { 
                case 1://点选
                    ESRI.ArcGIS.Geometry.Point point = new ESRI.ArcGIS.Geometry.Point();
                    point.X = e.mapX;
                    point.Y = e.mapY;
                    geometry = point as IGeometry;
                    break;
                case 2://圆选
                    geometry = axMapControl1.TrackCircle();
                    break;
                case 3://矩形
                    geometry = axMapControl1.TrackRectangle();
                    break;
                case 4://多边形选
                    geometry=axMapControl1.TrackPolygon();
                    break;

            }
            axMapControl1.Map.SelectByShape(geometry,null,false);
            axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection,null,null);
        }
        //加载地图文档
        private void loadMapDocument()
        {
            System.Windows.Forms.OpenFileDialog openFileDialog;
            openFileDialog = new OpenFileDialog();
            openFileDialog.Title = "打开地图文档";
            openFileDialog.Filter = "map documents(*.mxd)|*.mxd";
            openFileDialog.ShowDialog();
            string filePath = openFileDialog.FileName;
            if (axMapControl1.CheckMxFile(filePath))
            {
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;
                axMapControl1.LoadMxFile(filePath, 0, Type.Missing);
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
            }
            else
            {
                MessageBox.Show(filePath + "不是有效的地图文档");
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            //清楚选择
            IActiveView activeView = axMapControl1.Map as IActiveView;
            activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection,axMapControl1.get_Layer(0),null);
            axMapControl1.Map.ClearSelection();
            activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, axMapControl1.get_Layer(0), null);
        }

        private void button5_Click(object sender, EventArgs e)
        {
            //名称查询
            string name = textBox1.Text.Trim();
            ILayer layer = axMapControl1.get_Layer(0);
            IFeatureLayer featureLayer = layer as IFeatureLayer;
            IFeatureClass featureClass = featureLayer.FeatureClass;
            IQueryFilter queryFilter = new QueryFilter();          
            IFeature feature = null;//"GNIS_Name" = 'Blue Creek'
            queryFilter.WhereClause = "GNIS_Name like '%"+name+"%'";
          
                IFeatureCursor featureCursor;
                featureCursor = featureClass.Search(queryFilter, true);
                feature = featureCursor.NextFeature();
          
            if (feature != null)
            {
                axMapControl1.Map.SelectFeature(axMapControl1.get_Layer(0),feature);
                axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection,null,null);
            }
        }


     
    
    }
}