AE二次开发使用TextElement绘制标注

IFeatureCursor pFeatCursor; IFeatureClass pfeatClass; IFeatureLayer pfeatlayer; IFeature pfeature; IEnvelope pEnv; IRgbColor pColor; stdole.Font pFont; IPoint pt; IElement pEle; ITextElement pTextEle; IGraphicsContainer pGraphisContainer; ITextSymbol pTextSymbol; IActiveView pActiveView; pfeatlayer = (IFeatureLayer)axMapControl1.get_Layer(0); pfeatClass = pfeatlayer.FeatureClass; pFeatCursor = pfeatClass.Search(null, false); pfeature = pFeatCursor.NextFeature(); int fieldIdx; int i; //得到cname字段的Index fieldIdx = pfeature.Fields.FindField("CNTRY_NAME"); //创建颜色 pColor = new RgbColorClass(); pColor.Blue = 255; //创建字体 pFont = new stdole.StdFontClass(); pFont.Name = "楷体"; //创建标注样式 pTextSymbol = new TextSymbolClass(); pTextSymbol.Color = pColor; pTextSymbol.Font = pFont as stdole.IFontDisp; pTextSymbol.Size = 10; pGraphisContainer = axMapControl1.Map as IGraphicsContainer; pActiveView = axMapControl1.Map as IActiveView; //使用循环标注每个要素 while (pfeature != null) { pEnv = pfeature.Extent; pt = new PointClass(); //使用地理对象的包络线中心作为标注位置 pt.PutCoords(pEnv.XMin + pEnv.Width * 0.5, pEnv.YMin + pEnv.Height * 0.5); //创建文本标注 pTextEle = new TextElementClass(); pTextEle.Symbol = pTextSymbol; pTextEle.Text = pfeature.get_Value(fieldIdx).ToString(); //设置标注位置 pEle = pTextEle as IElement; pEle.Geometry = pt; //绘制标注 pGraphisContainer.AddElement(pEle, 0); pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pEnv); pt = null; pTextEle = null; pfeature = pFeatCursor.NextFeature(); } string CurrentPath = Directory.GetCurrentDirectory(); Directory.SetCurrentDirectory(CurrentPath + "\\..\\..\\..\\..\\..\\data\\WORLD"); string FilePath = Directory.GetCurrentDirectory(); axMapControl1.AddShapeFile(FilePath, "country.shp"); axMapControl1.AddShapeFile(FilePath, "rivers.shp"); axMapControl1.AddShapeFile(FilePath, "cities.shp"); IMap pMap; int i; pMap = axMapControl1.Map; for (i = 0; i <= pMap.LayerCount - 1; i++) { axMapControl2.Map.AddLayer(pMap.get_Layer(i)); } } private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e) { if (e.button == 1) { axMapControl1.Extent = axMapControl1.TrackRectangle(); } else if (e.button == 2) { axMapControl1.Pan(); } } private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e) { IEnvelope pEnv; pEnv =(IEnvelope)e.newEnvelope; IGraphicsContainer pGraphicsContainer; IActiveView pActiveView; pGraphicsContainer = axMapControl2.Map as IGraphicsContainer; pActiveView = pGraphicsContainer as IActiveView; //在绘制新的矩形框前，清除Map对象中的所有图形元素 pGraphicsContainer.DeleteAllElements(); //定义一个矩形元素对象 IRectangleElement pRectangelEle; pRectangelEle = new RectangleElementClass(); IElement pEle; pEle = pRectangelEle as IElement; pEle.Geometry = pEnv; IRgbColor pColor; pColor = new RgbColorClass(); pColor.Red = 255; pColor.Transparency = 255; //产生一个线符号对象 ILineSymbol pOutline; pOutline = new SimpleLineSymbolClass(); //设置线符号的属性 pOutline.Color = pColor; pOutline.Width = 2; //设置颜色属性 pColor = new RgbColorClass(); pColor.Transparency = 0; //设置填充符号的属性 IFillSymbol pFillSymbol; pFillSymbol = new SimpleFillSymbolClass(); pFillSymbol.Color = pColor; pFillSymbol.Outline = pOutline; IFillShapeElement pFillshapeEle; pFillshapeEle = pEle as IFillShapeElement; pFillshapeEle.Symbol = pFillSymbol; pEle = pFillshapeEle as IElement; pGraphicsContainer.AddElement(pEle,0); pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); } private void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e) { IPoint point = new PointClass(); point.PutCoords(e.mapX, e.mapY); axMapControl1.CenterAt(point); } }