AE C# 图片和文本标注（通过查询）

查询数据后，图形标注

if (myds1V.Tables[0].Rows.Count > 0)

{

IActiveView pActiveView = (IActiveView)this.axMapControl1.Map;

this.axMapControl1.Map.ClearSelection();

pActiveView.Refresh();

IGraphicsContainer pGraphicsContainer = (IGraphicsContainer)pActiveView;

pGraphicsContainer.DeleteAllElements();

ILayer pLayer = this.axMapControl1.Map.get_Layer(0);

if (pLayer.Name=="jx-xian")

{

IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;

IQueryFilter pQueryFilter = new QueryFilterClass();

IEnvelope pEnvelope = new EnvelopeClass();

IRgbColor rgbColor = new RgbColorClass();

IPictureMarkerSymbol pictureMarkerSymbol = new PictureMarkerSymbolClass();

// IPoint pPoint = new PointClass();

string fileName = "iconimg\\ico\\point.png";

pictureMarkerSymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPicturePNG, fileName);

pictureMarkerSymbol.Angle = 0;

pictureMarkerSymbol.BitmapTransparencyColor = rgbColor;

pictureMarkerSymbol.Size = 32;

pictureMarkerSymbol.XOffset = 0;

pictureMarkerSymbol.YOffset = 0;

for (int rn = 0; rn < myds1V.Tables[0].Rows.Count; rn++)

{

try

{

pQueryFilter.WhereClause = "名称 =" + "'" + myds1V.Tables[0].Rows[rn][1].ToString().Trim() + "'";

IFeatureSelection pFeatureSelection = pFeatureLayer as IFeatureSelection; //用来记录最终的结果，由于用户可能在不关闭此窗口的情况下进行

int iSelectedFeaturesCount = pFeatureSelection.SelectionSet.Count;//SelectionSet:The selected set of features.

esriSelectionResultEnum selectMethod;//用来记录处理结果的方法，用在用whereclause查询的地方

selectMethod = esriSelectionResultEnum.esriSelectionResultNew;

pFeatureSelection.SelectFeatures(pQueryFilter, selectMethod, false);//执行查询

//如果本次查询后，查询的结果数目没有改变，则认为本次查询没有产生新的结果

if (pFeatureSelection.SelectionSet.Count != 0)

{

IEnumFeature pEnumFeature = axMapControl1.Map.FeatureSelection as IEnumFeature;

IFeature pFeature = pEnumFeature.Next();

while (pFeature != null)

{

// geometry = pFeature.ShapeCopy;

pEnvelope.Union(pFeature.Extent);

double mapX, mapY;

mapX = (pFeature.Extent.XMax + pFeature.Extent.XMin) / 2;

mapY = (pFeature.Extent.YMax + pFeature.Extent.YMin) / 2;

IPoint pPoint = new PointClass();

pPoint.PutCoords(mapX, mapY);

IPictureMarkerSymbol pPictureMarkerSymbol = new PictureMarkerSymbolClass();

pPictureMarkerSymbol.Size = 20;

pPictureMarkerSymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPicturePNG, fileName);

IMarkerElement pMarkerElement = new MarkerElementClass();

pMarkerElement.Symbol = pPictureMarkerSymbol as IMarkerSymbol;

IElement pElement = (IElement)pMarkerElement;

pElement.Geometry = pPoint;

pGraphicsContainer.AddElement(pElement, 0);

axMapControl1.FlashShape(pFeature.Shape, 3, 500, null);

pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

pFeature = pEnumFeature.Next();

}

}

}

catch (Exception ex)

{

MessageBox.Show("您的查询语句可能有误,请检查 | " + ex.Message);

return;

}

}

}

pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);

FrmEditSpecimen frmEditSpec = new FrmEditSpecimen(myds);

frmEditSpec.Show();

}

查询数据后，图形或文本标注

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using ESRI.ArcGIS.Carto;

using ESRI.ArcGIS.Controls;

using ESRI.ArcGIS.Geodatabase;

using ESRI.ArcGIS.Geometry;

using ESRI.ArcGIS.Display;

namespace GIS_Demo1

{

public partial class PropertyQueryFrm : Form

{

public IMapControl2 pMapControl;

public IMap pMap;

public int iLayerIndex;

public int iFieldIndex;

public PropertyQueryFrm(IMapControl2 pFMapControl)

{

pMapControl = pFMapControl;

pMap = pFMapControl.Map;

InitializeComponent();

}

private void PropertyQueryFrm_Load(object sender, EventArgs e)

{

ILayer pLayer;

for (int i = 0; i < pMap.LayerCount; i++)

{

pLayer = pMap.get_Layer(i);

clbLayers.Items.Add(pLayer.Name);

}

}

//属性查图

private void btnQuery_Click(object sender, EventArgs e)

{

int ct = 0;

if (clbLayers.Items.Count <= 0)

{

MessageBox.Show("请先加入待选择查询的图层", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

return;

}

for (int i = 0; i < clbLayers.Items.Count; i++)

{

if (clbLayers.GetItemChecked(i))

{

ct = ct + 1;

}

}

if (ct <= 0)

{

MessageBox.Show("请选择查询的图层", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

return;

}

IActiveView pActiveView = (IActiveView)pMap;

pMap.ClearSelection();

pActiveView.Refresh();

IQueryFilter pQueryFilter = new QueryFilterClass();

IFeatureLayer pFeatureLayer;

IGraphicsContainer pGraphicsContainer = (IGraphicsContainer)pActiveView;

pGraphicsContainer.DeleteAllElements();

for (int i = 0; i < clbLayers.Items.Count; i++)

{

if (clbLayers.GetItemChecked(i))

{

//iLayerIndex = clbLayers.Items.IndexOf(i);

pFeatureLayer = (IFeatureLayer)pMap.get_Layer(i);

if (pFeatureLayer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPoint)

{

IFields pFields = pFeatureLayer.FeatureClass.Fields;

IField pField = pFields.get_Field(iFieldIndex);

pQueryFilter.WhereClause = lblFieldList.Text + "='" + txbValue.Text + "'";

IFeatureCursor pFeatureCursor = pFeatureLayer.FeatureClass.Search(pQueryFilter, false);

IFeature pFeature = pFeatureCursor.NextFeature();

while (pFeature != null)

{

double mapX, mapY;

mapX = (pFeature.Extent.XMax + pFeature.Extent.XMin) / 2;

mapY = (pFeature.Extent.YMax + pFeature.Extent.YMin) / 2;

IPoint pPoint = new PointClass();

pPoint.PutCoords(mapX, mapY);

IPictureMarkerSymbol pPictureMarkerSymbol = new PictureMarkerSymbolClass();

pPictureMarkerSymbol.Size = 20;

pPictureMarkerSymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPictureBitmap, "E:\\资料文档\\GIS Demo1\\image\\TPieceOptDN1.bmp");

IMarkerElement pMarkerElement = new MarkerElementClass();

pMarkerElement.Symbol = pPictureMarkerSymbol as IMarkerSymbol;

IElement pElement = (IElement)pMarkerElement;

pElement.Geometry = pPoint;

//pMapControl.CenterAt(pPoint);

pGraphicsContainer.AddElement(pElement, 0);

pMapControl.FlashShape(pFeature.Shape, 3, 500, null);

//pMap.SelectFeature(pFeatureLayer, pFeature);

pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

pFeature = pFeatureCursor.NextFeature();

}

}

else

{

IFields pFields = pFeatureLayer.FeatureClass.Fields;

IField pField = pFields.get_Field(iFieldIndex);

pQueryFilter.WhereClause = lblFieldList.Text + "='" + txbValue.Text + "'";

IFeatureCursor pFeatureCursor = pFeatureLayer.FeatureClass.Search(pQueryFilter, false);

IFeature pFeature = pFeatureCursor.NextFeature();

while (pFeature != null)

{

pMapControl.FlashShape(pFeature.Shape, 3, 500, null);

//pMapControl.CenterAt(pPoint);

pMap.SelectFeature(pFeatureLayer, pFeature);

pFeature = pFeatureCursor.NextFeature();

}

}

}

}

pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);

}

private void btnClose_Click(object sender, EventArgs e)

{

this.Close();

}

private void btnClear_Click(object sender, EventArgs e)

{

IMap pMap = pMapControl.Map;

IActiveView pActiveView = (IActiveView)pMap;

IGraphicsContainer pGraphicsContainer = (IGraphicsContainer)pActiveView;

pGraphicsContainer.DeleteAllElements();

pMap.ClearSelection();

pActiveView.Refresh();

}

}

}