属性查询代码.doc

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using QueryAttri;using ESRI.ArcGIS.Geodatabase;using ESRI.ArcGIS.Geometry;using ESRI.ArcGIS.SystemUI;using ESRI.ArcGIS.DataSourcesFile;using ESRI.ArcGIS.Carto;using ESRI.ArcGIS.Controls;using ESRI.ArcGIS.Display;using System.IO;using System.Data.OleDb;namespace 属性查询 public partial class Form1 : Form public Form1() InitializeComponent(); string layername; string fieldname; private ILayer m_curLayer; private ICursor m_fetureSelCursor; private IMap m_map; private IActiveView m_activeView; private QueryAttri.UserControl1 UserControl11; private System.Windows.Forms.ToolBarButton ToolBarButton2; private void Form1_Load(object sender, EventArgs e) m_map = axMapControl1.Map ; m_curLayer = axMapControl1.Map.get_Layer(0); private double ConvertPixelsToMapUnits(IMap pMap, double pixelUnits) double temp; IActiveView pActiveView; pActiveView = pMap as IActiveView; double realWorldDisplayExtent; int pixelExtent; double sizeOfOnePixel; tagRECT ptR; ptR = pActiveView.ScreenDisplay.DisplayTransformation.get_DeviceFrame(); pixelExtent = ptR.right - ptR.left; realWorldDisplayExtent = pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds.Width; sizeOfOnePixel = realWorldDisplayExtent / pixelExtent; temp = pixelUnits * sizeOfOnePixel; return temp; private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e) m_map.ClearSelection(); switch (axMapControl1.MousePointer) case esriControlsMousePointer.esriPointerIdentify: IFeatureLayer pFeatureLayer; IFeatureClass pFeatureClass; ISpatialFilter pSpatialFilter; IQueryFilter pFilter; IActiveView pActiveView; IGeometry pGeometry; IPoint pPoint; if (m_curLayer = null) return; pFeatureLayer = m_curLayer as FeatureLayer; pFeatureClass = pFeatureLayer.FeatureClass; if (pFeatureClass = null) return; /*屏幕坐标转换为地图坐标 m_activeView = m_map as IActiveView; pPoint = m_activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y); pGeometry = pPoint; /*生成4个像素单位缓冲区 double pLength; pLength = ConvertPixelsToMapUnits(m_map, 16); ITopologicalOperator pTopologicalOperator; pTopologicalOperator = pGeometry as ITopologicalOperator; IGeometry pBuffer; pBuffer = pTopologicalOperator.Buffer(pLength); pGeometry = pBuffer.Envelope; /*清除前一个选择 m_map.ClearSelection(); /UnShowAllVertex() m_activeView.Refresh(); /m_activeView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); /*设置空间过滤 pSpatialFilter = new SpatialFilter(); pSpatialFilter.Geometry = pGeometry; switch (pFeatureClass.ShapeType) case esriGeometryType.esriGeometryPoint: pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelContains; break; case esriGeometryType.esriGeometryLine: pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects; break; case esriGeometryType.esriGeometryPolyline: pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects; break; case esriGeometryType.esriGeometryPolygon: pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIndexIntersects; break; pSpatialFilter.GeometryField = pFeatureClass.ShapeFieldName; pFilter = pSpatialFilter; /*空间查询 IFeatureCursor pCursor; pCursor = pFeatureLayer.Search(pFilter, false); /*在地图上选择特征 IFeature pFeature; pFeature = pCursor.NextFeature(); /如果没有选中地物 if (pFeature = null) m_map.ClearSelection(); m_activeView.Refresh(); /*高亮显示 while (pFeature != null) m_map.SelectFeature(m_curLayer, pFeature); pFeature = pCursor.NextFeature(); /*地图刷新esriViewGeoSelection m_activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null); if (this.UserControl11 = null) this.UserControl11 = new QueryAttri.UserControl1(axMapControl1.Object); /this.UserControl11.Load(); (System.ComponentModel.ISupportInitialize)this.axMapControl1).BeginInit(); this.UserControl11.Location = new System.Drawing.Point(480, 32); this.UserControl11.Name = UserControl11; this.UserControl11.Size = new System.Drawing.Size(480, 360); this.UserControl11.TabIndex = 5; this.Controls.Add(this.UserControl11); else this.UserControl11.initSelectFeatures(); return; private void toolStrip