AE+C# Identify 功能实现.doc

首先新建一个WInForm，然后向其中添加一个combobox，一个DataGridView，以及label、statusbar等（界面使用第三方控件制作而成），combobox用于显示所有的图层，statusbar显示查询到的要素的字段个数以及鼠标点击处的坐标。 代码如下：using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using ESRI.ArcGIS.esriSystem;using ESRI.ArcGIS.Carto;using ESRI.ArcGIS.Geometry;using ESRI.ArcGIS.Controls;using ESRI.ArcGIS.Display;using ESRI.ArcGIS.SystemUI;using ESRI.ArcGIS.Geodatabase;using ESRI.ArcGIS.DataSourcesRaster;namespace Tools public partial class frmIdentify : Form AxMapControl axMapControl = null; IFeature pFeature; int selectedIndex = 0; public frmIdentify(ESRI.ArcGIS.Controls.AxMapControl axmapcontrol) InitializeComponent(); this.axMapControl = axmapcontrol; /设置axmapcontrol的CurrentTool属性为空，更改鼠标样式 axmapcontrol.CurrentTool = null; axmapcontrol.MousePointer = ESRI.ArcGIS.Controls.esriControlsMousePointer.esriPointerIdentify; private void frmIdentify_Load(object sender, EventArgs e) for (int i = 0; i axMapControl.LayerCount; i+) comboBox1.Items.Add(axMapControl.get_Layer(i).Name.ToString(); /设置dataGridView1的列数和列头 dataGridView1.ColumnCount = 2; dataGridView1.RowHeadersWidth = 60; dataGridView1.TopLeftHeaderCell.Value = 属性表; dataGridView1.Columns0.HeaderText = 字段; dataGridView1.Columns1.HeaderText = 属性值; comboBox1.SelectedIndex = 0; dataGridView1.Columns1.Width = dataGridView1.Width - dataGridView1.Columns0.Width - 63; /设置dataGridView1 、textBox1不可编辑 dataGridView1.ReadOnly = true; public void OnMouseDown(int button, double x, double y) if (axMapControl.get_Layer(selectedIndex) is IRasterLayer) IPoint pMouseDownPoint; pMouseDownPoint = new PointClass(); pMouseDownPoint.PutCoords(x, y); pMouseDownPoint.SpatialReference = axMapControl.Map.SpatialReference; ExcuteIdentifyByPoint(pMouseDownPoint); else dataGridView1.Refresh(); uiStatusBar1.Refresh(); IEnvelope pEnvelope = null; pEnvelope = axMapControl.TrackRectangle(); /当仅点击鼠标，没有拖动时 if (pEnvelope.IsEmpty = true) IPoint pMouseDownPoint; pMouseDownPoint = new PointClass(); pMouseDownPoint.PutCoords(x, y); pMouseDownPoint.SpatialReference = axMapControl.Map.SpatialReference; IGeometry bufGeo; ITopologicalOperator bufferPoint = pMouseDownPoint as ITopologicalOperator; bufGeo = bufferPoint.Buffer(axMapControl.ActiveView.Extent.Width / 250); pEnvelope = bufGeo.Envelope; ExcuteIdentifyByEnvelope(pEnvelope); else ExcuteIdentifyByEnvelope(pEnvelope); ShowLocation(x, y, (int)(axMapControl.MapUnits); # region 显示当前坐标 public void ShowLocation(double x, double y, int unit) string strUnit = null; switch (unit) case 0: strUnit = 未知单位; break; case 1: strUnit = 英尺; break; case 2: strUnit = 像素; break; case 3: strUnit = 步; break; case 4: strUnit = 码; break; case 5: strUnit = 英里; break; case 6: strUnit = 海里; break; case 7: strUnit = 毫米; break; case 8: strUnit = 厘米; break; case 9: strUnit = 米; break; case 10: strUnit = 千米; break; case 11: strUnit = 度; break; case 12: strUnit = 分米; break; case 13: strUnit = esriUnitLast; break; default: strUnit = ; break; /textBox1.Text = X： + x.ToString().Substring(0,x.ToString().LastIndexOf(.)+5) + +strUnit+ , Y： + y.ToString().Substring(0,y.ToString().LastIndexOf(.)+5) + + strUnit; this.uiStatusBar1.Panels1.Text = X： + x.ToString(#.#) + strUnit + , Y： + y.ToString(#.#) + strUnit; # endregion private void uiButton1_Click(object sender, EventArgs e) if (pFeature.Shape.GeometryType = esriGeometryType.esriGeometryPoint) IGeometry bufferGeo; ITopologicalOperator buffer = pFeature.ShapeCopy as ITopologicalOperator; bufferGeo = buffer.Buffer(1000); axMapControl.Extent = bufferGeo.Envelope; else axMapControl.Extent = pFeature.Extent; axMapControl.Refresh(); axMapControl.FlashShape(pFeature.ShapeCopy, 2, 10, null); private void dataGridView1_SizeChanged_1(object sender, EventArgs e) dataGridView1.Columns1.Width = dataGridView1.Width - dataGridView1.Columns0.Width; private void frmIdentify_FormClosed_2(object sender, FormClosedEventArgs e) axMapControl.MousePointer = ESRI.ArcGIS.Controls.esriControlsMousePointer.esriPointerArrow; private void comboBox1_SelectedIndexChanged_1(object sender, EventArgs e) dataGridView1.Rows.Clear(); this.uiStatusBar1.Panels1.Text = 坐标：; this.uiStatusBar1.Panels0.Text = 查询; this.uiStatusBar1.Refresh(); selectedIndex = comboBox1.SelectedIndex; # region 查询 IArray pIDArray; /通过点Envelope进行查询 private void ExcuteIdentifyByEnvelope(IEnvelope identifyenvelope) IIdentify pIdentify; IFeatureIdentifyObj pFeatureIdentifyObj; IIdentifyObj pIdentifyObj; pIdentify = axMapControl.Map.get_Layer(selectedIndex) as IIdentify; pIDArray = pIdentify.Identify(identifyenvelope); /MessageBox.Show(OnMouseDown Method); if (pIDArray != null) pFeatureIdentifyObj = pIDArray.get_Element(0) as IFeatureIdentifyObj; pIdentifyObj = pFeatureIdentifyObj as IIdentifyObj; pIdentifyObj.Flash(axMapControl.ActiveView.ScreenDisplay); pFeature = (pIDArray.get_Element(0) as IRowIdentifyObject).Row as IFeature; ShowAttribute(pFeature); else dataGridView1.Rows.Clear(); this.uiStatusBar1.Panels0.Text = 提示： 没有查询到任何要素！; /通过点进行查询 private void ExcuteIdentifyByPoint(IPoint point) IIdentify pIdentify; IArray pIDArray; IRasterLayer pRasterLayer; IRaster pRaster; pRasterLayer = axMapControl.get_Layer(selectedIndex) as IRasterLayer; pRaster = pRasterLayer.Raster; pIdentify = pRasterLayer as IIdentify; pIDArray = pIdentify.Identify(point); IRasterIdentifyObj pRasterIObj; pRasterIObj = pIDArray.get_Element(0) as IRasterIdentifyObj; dataGridView1.ColumnCount = 2; for (int i = 0; i pIDArray.Count; i+) if (axMapControl.get_Layer(selectedIndex).Name = 自治区遥感底图) dataGridView10, i.Value = 影像象元值; else dataGridView10, i.Value = pRasterLayer.Name.ToString(); dataGridView11, i.Value = pRasterIObj.MapTip.ToString(); # endregion # region ShowAttribute方法 显示属性表 public void ShowAttribute(IFeature feature) int num = feature.Fields.FieldCount; dataGridView1.RowCount = num; for (int i = 0; i num; i+) dataGridView1.Rowsi.HeaderCell.Value = i.ToString(); dataGridView10, i.Value = feature.Fields.get_Field(i).Name.ToString(); if (feature.Fields.get_Field(i).Type = esriFieldType.esriFieldTypeGeometry) string type = feature.Shape.GeometryType.ToString(); switch (type) case esriGeometryPoint: dataGridView11, i.Value = 点; break; case esriGeometryPolyline: dataGridView11, i.Value = 线; break; case esriGeometryPolygon: dataGridView11, i.Value = 面;