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[转] Symbol对象
GIS中的离散实体有三种：点、线、面，在ArcEngine中用三种符号对应表示，分别是：MarkSymbol、LineSymbol和FillSymbol。此外还有TextSymbol用于文字标注，3DChart用来显示饼图等三维对象。
所有符号都实现ISymbol和IMapLevel接口，ISymbol定义一个符号对象的基本属性和方法，IMapLevel定义属性可以确定符号显示的图层，和图层类似，用于确定符号的叠加顺序。
一、MarkerSymbol对象
MarkerSymbol对象用于修饰点对象符号，拥有12个子类：
| Classes | Description |
|---|---|
| ArrowMarkerSymbol | 箭头形式符号，箭头的样式只有一个：esriAMSPlain |
| BarChartSymbol | Defines a bar chart symbol. |
| CharacterMarker3DSymbol (3DAnalyst) | 3D Character Marker Symbol component. |
| CharacterMarkerSymbol | 字符形式符号，用于将一个点要素显示为字符状。Characterindex属性用来确定显示的字符 |
| Marker3DSymbol (3DAnalyst) | 3D Marker Symbol component. |
| MultiLayerMarkerSymbol | 使用多个符号进行叠加生成新符号。 |
| PictureMarkerSymbol | 以图片为背景的符号，把一个点对象的外形表示为一个位图，可以指定Picture或者使用CreateMarkSymbolFromFile获取一张位图 |
| PieChartSymbol | Defines a pie chart symbol. |
| SimpleMarker3DSymbol (3DAnalyst) | Simple 3D Marker Symbol component. |
| SimpleMarkerSymbol | 简单类型点符号，有五种类型（esriSMSCircle、esriSMSSquare、esriSMSCross、esriSMSX和esriSMSDiamond） |
| StackedChartSymbol | Defines a stacked chart symbol. |
| TextMarkerSymbol (TrackingAnalyst) | Class used to create a text marker symbol used to symbolize point geometries. |
都实现IMarkerSymbol接口，定义了Angle、Color、Size、Xoffset、Yoffset。
private void simpleLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass(); simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDotDot; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; simpleLineSymbol.Width = 10; IRgbColor rgbColor = getRGB(255, 0, 0); simpleLineSymbol.Color = rgbColor; ISymbol symbol = simpleLineSymbol as ISymbol; symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; IActiveView activeView = this.axMapControl1.ActiveView; //用activeView.ScreenDisplay进行画图 activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(symbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing();//释放资源 } private void cartographicLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { ICartographicLineSymbol cartographicLineSymbol = new CartographicLineSymbolClass();//制图线符号 cartographicLineSymbol.Cap = esriLineCapStyle.esriLCSButt; cartographicLineSymbol.Join = esriLineJoinStyle.esriLJSBevel;//连接方式 cartographicLineSymbol.Width = 10; cartographicLineSymbol.MiterLimit = 4;//Size threshold(阈值) for showing mitered line joins. ILineProperties lineProperties; lineProperties = cartographicLineSymbol as ILineProperties; lineProperties.Offset = 0; double[] dob = new double[6]; dob[0] = 0; dob[1] = 1; dob[2] = 2; dob[3] = 3; dob[4] = 4; dob[5] = 5; ITemplate template = new TemplateClass();//定义模版 template.Interval = 1; for (int i = 0; i < dob.Length; i += 2) { template.AddPatternElement(dob[i], dob[i + 1]); } lineProperties.Template = template; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IRgbColor rgbColor = getRGB(0, 255, 0); cartographicLineSymbol.Color = rgbColor; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(cartographicLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } private void multiLayerLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IMultiLayerLineSymbol multiLayerLineSymbol = new MultiLayerLineSymbolClass(); ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass(); simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDotDot; simpleLineSymbol.Width = 10; IRgbColor rgbColor = getRGB(255, 0, 0); simpleLineSymbol.Color = rgbColor; ISymbol symbol = simpleLineSymbol as ISymbol; symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; ICartographicLineSymbol cartographicLineSymbol = new CartographicLineSymbolClass(); cartographicLineSymbol.Cap = esriLineCapStyle.esriLCSButt; cartographicLineSymbol.Join = esriLineJoinStyle.esriLJSBevel; cartographicLineSymbol.Width = 10; cartographicLineSymbol.MiterLimit = 4; ILineProperties lineProperties; lineProperties = cartographicLineSymbol as ILineProperties; lineProperties.Offset = 0; double[] dob = new double[6]; dob[0] = 0; dob[1] = 1; dob[2] = 2; dob[3] = 3; dob[4] = 4; dob[5] = 5; ITemplate template = new TemplateClass(); template.Interval = 1; for (int i = 0; i < dob.Length; i += 2) { template.AddPatternElement(dob[i], dob[i + 1]); } lineProperties.Template = template; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; rgbColor = getRGB(0, 255, 0); cartographicLineSymbol.Color = rgbColor; multiLayerLineSymbol.AddLayer(simpleLineSymbol); multiLayerLineSymbol.AddLayer(cartographicLineSymbol); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(multiLayerLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } private void hashLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IHashLineSymbol hashLineSymbol = new HashLineSymbolClass(); ILineProperties lineProperties = hashLineSymbol as ILineProperties; lineProperties.Offset = 0; double[] dob = new double[6]; dob[0] = 0; dob[1] = 1; dob[2] = 2; dob[3] = 3; dob[4] = 4; dob[5] = 5; ITemplate template = new TemplateClass(); template.Interval = 1; for (int i = 0; i < dob.Length; i += 2) { template.AddPatternElement(dob[i], dob[i + 1]); } lineProperties.Template = template; hashLineSymbol.Width = 2; hashLineSymbol.Angle = 45; IRgbColor hashColor = new RgbColor(); hashColor = getRGB(0, 0, 255); hashLineSymbol.Color = hashColor; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(hashLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } //下面的没有看 private void markerLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IArrowMarkerSymbol arrowMarkerSymbol = new ArrowMarkerSymbolClass(); IRgbColor rgbColor = getRGB(255, 0, 0); arrowMarkerSymbol.Color = rgbColor as IColor; arrowMarkerSymbol.Length = 10; arrowMarkerSymbol.Width = 10; arrowMarkerSymbol.Style = esriArrowMarkerStyle.esriAMSPlain; IMarkerLineSymbol markerLineSymbol = new MarkerLineSymbolClass(); markerLineSymbol.MarkerSymbol = arrowMarkerSymbol; rgbColor = getRGB(0, 255, 0); markerLineSymbol.Color = rgbColor; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(markerLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } private void pictureLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IPictureLineSymbol pictureLineSymbol = new PictureLineSymbolClass(); //创建图片符号 //string fileName = @"E:\vs2005\第五章\lesson2\lesson2\data\qq.bmp"; string path = Directory.GetCurrentDirectory(); string fileName = path + @"\qq.bmp"; pictureLineSymbol.CreateLineSymbolFromFile(esriIPictureType.esriIPictureBitmap, fileName); IRgbColor rgbColor = getRGB(0, 255, 0); pictureLineSymbol.Color = rgbColor; pictureLineSymbol.Offset = 0; pictureLineSymbol.Width = 10; pictureLineSymbol.Rotate = false; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(pictureLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); }
二、LineSymbol对象
用于修饰线性几何对象符号。Color和Width属性为两个唯一公共属性。
子类有：
| Classes | Description |
|---|---|
| CartographicLineSymbol | 制图线符号，实现ICatographicLineSymbol（主要设置线符号的节点属性，Join：设置线要素转折处的样式）和ILineProperties接口 |
| HashLineSymbol | 离散线符号 |
| MarkerLineSymbol | A line symbol composed of repeating markers.点线符号 |
| MultiLayerLineSymbol | A line symbol that contains one or more layers.使用重叠符号方法产生新符号 |
| PictureLineSymbol | A line symbol composed of either a BMP or an EMF picture.比如火车线路符号 |
| SimpleLine3DSymbol (3DAnalyst) | Simple 3D Line Symbol component. |
| SimpleLineSymbol | 简单线符号 |
| TextureLineSymbol (3DAnalyst) | Texture Line Symbol component.（纹理贴图线符号） |
private void simpleLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass(); simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDotDot; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; simpleLineSymbol.Width = 10; IRgbColor rgbColor = getRGB(255, 0, 0); simpleLineSymbol.Color = rgbColor; ISymbol symbol = simpleLineSymbol as ISymbol; symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; IActiveView activeView = this.axMapControl1.ActiveView; //用activeView.ScreenDisplay进行画图 activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(symbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing();//释放资源 } private void cartographicLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { ICartographicLineSymbol cartographicLineSymbol = new CartographicLineSymbolClass();//制图线符号 cartographicLineSymbol.Cap = esriLineCapStyle.esriLCSButt; cartographicLineSymbol.Join = esriLineJoinStyle.esriLJSBevel;//连接方式 cartographicLineSymbol.Width = 10; cartographicLineSymbol.MiterLimit = 4;//Size threshold(阈值) for showing mitered line joins. ILineProperties lineProperties; lineProperties = cartographicLineSymbol as ILineProperties; lineProperties.Offset = 0; double[] dob = new double[6]; dob[0] = 0; dob[1] = 1; dob[2] = 2; dob[3] = 3; dob[4] = 4; dob[5] = 5; ITemplate template = new TemplateClass();//定义模版 template.Interval = 1; for (int i = 0; i < dob.Length; i += 2) { template.AddPatternElement(dob[i], dob[i + 1]); } lineProperties.Template = template; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IRgbColor rgbColor = getRGB(0, 255, 0); cartographicLineSymbol.Color = rgbColor; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(cartographicLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } private void multiLayerLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IMultiLayerLineSymbol multiLayerLineSymbol = new MultiLayerLineSymbolClass(); ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass(); simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDotDot; simpleLineSymbol.Width = 10; IRgbColor rgbColor = getRGB(255, 0, 0); simpleLineSymbol.Color = rgbColor; ISymbol symbol = simpleLineSymbol as ISymbol; symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; ICartographicLineSymbol cartographicLineSymbol = new CartographicLineSymbolClass(); cartographicLineSymbol.Cap = esriLineCapStyle.esriLCSButt; cartographicLineSymbol.Join = esriLineJoinStyle.esriLJSBevel; cartographicLineSymbol.Width = 10; cartographicLineSymbol.MiterLimit = 4; ILineProperties lineProperties; lineProperties = cartographicLineSymbol as ILineProperties; lineProperties.Offset = 0; double[] dob = new double[6]; dob[0] = 0; dob[1] = 1; dob[2] = 2; dob[3] = 3; dob[4] = 4; dob[5] = 5; ITemplate template = new TemplateClass(); template.Interval = 1; for (int i = 0; i < dob.Length; i += 2) { template.AddPatternElement(dob[i], dob[i + 1]); } lineProperties.Template = template; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; rgbColor = getRGB(0, 255, 0); cartographicLineSymbol.Color = rgbColor; multiLayerLineSymbol.AddLayer(simpleLineSymbol); multiLayerLineSymbol.AddLayer(cartographicLineSymbol); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(multiLayerLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } private void hashLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IHashLineSymbol hashLineSymbol = new HashLineSymbolClass(); ILineProperties lineProperties = hashLineSymbol as ILineProperties; lineProperties.Offset = 0; double[] dob = new double[6]; dob[0] = 0; dob[1] = 1; dob[2] = 2; dob[3] = 3; dob[4] = 4; dob[5] = 5; ITemplate template = new TemplateClass(); template.Interval = 1; for (int i = 0; i < dob.Length; i += 2) { template.AddPatternElement(dob[i], dob[i + 1]); } lineProperties.Template = template; hashLineSymbol.Width = 2; hashLineSymbol.Angle = 45; IRgbColor hashColor = new RgbColor(); hashColor = getRGB(0, 0, 255); hashLineSymbol.Color = hashColor; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(hashLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } //下面的没有看 private void markerLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IArrowMarkerSymbol arrowMarkerSymbol = new ArrowMarkerSymbolClass(); IRgbColor rgbColor = getRGB(255, 0, 0); arrowMarkerSymbol.Color = rgbColor as IColor; arrowMarkerSymbol.Length = 10; arrowMarkerSymbol.Width = 10; arrowMarkerSymbol.Style = esriArrowMarkerStyle.esriAMSPlain; IMarkerLineSymbol markerLineSymbol = new MarkerLineSymbolClass(); markerLineSymbol.MarkerSymbol = arrowMarkerSymbol; rgbColor = getRGB(0, 255, 0); markerLineSymbol.Color = rgbColor; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(markerLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); } private void pictureLineSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IPictureLineSymbol pictureLineSymbol = new PictureLineSymbolClass(); //创建图片符号 //string fileName = @"E:\vs2005\第五章\lesson2\lesson2\data\qq.bmp"; string path = Directory.GetCurrentDirectory(); string fileName = path + @"\qq.bmp"; pictureLineSymbol.CreateLineSymbolFromFile(esriIPictureType.esriIPictureBitmap, fileName); IRgbColor rgbColor = getRGB(0, 255, 0); pictureLineSymbol.Color = rgbColor; pictureLineSymbol.Offset = 0; pictureLineSymbol.Width = 10; pictureLineSymbol.Rotate = false; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(pictureLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.FinishDrawing(); activeView.ScreenDisplay.FinishDrawing(); }
三、FillSymbol对象
用来修饰多边形等具有面积的几何形体的符号对象。只定义Color和OutLine两个属性。
| Classes | Description |
|---|---|
| ColorRampSymbol (Carto) | ESRI ColorRampSymbol for raster rendering. |
| ColorSymbol (Carto) | ESRI ColorSymbol for raster rendering. |
| DotDensityFillSymbol | Defines a dot density fill symbol, a data driven symbol commonly used with the DotDensityRenderer对象. |
| GradientFillSymbol | 渐变颜色填充符号，IntervalCount属性来设置用户所需要的颜色梯度。 |
| LineFillSymbol | 线填充符号，表现为重复的线条，可以设置线的角度，偏移量和线之间的间隔距离。 |
| MarkerFillSymbol | 点填充符号，使用一个Marker符号作为背景填充符号，实现了IMarkerFillSymbol和IFillProperties两个接口 |
| MultiLayerFillSymbol | 多层填充符号，使用多个填充符号进行叠加 |
| PictureFillSymbol | A fill symbol based on either a BMP or an EMF picture. |
| RasterRGBSymbol (Carto) | ESRI RasterRGBSymbol for raster rendering. |
| SimpleFillSymbol | A fill symbol comprised from a predefined set of styles. |
| TextureFillSymbol (3DAnalyst) | Texture Fill Symbol component. |
private void simpleFillSymbolToolStripMenuItem_Click(object sender, EventArgs e) { //简单填充符号 ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass(); simpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid; simpleFillSymbol.Color = getRGB(255, 0, 0); //创建边线符号 ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass(); simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDotDot; simpleLineSymbol.Color = getRGB(0, 255, 0); simpleLineSymbol.Width = 10; ISymbol symbol = simpleLineSymbol as ISymbol; symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; simpleFillSymbol.Outline = simpleLineSymbol; //创建面对象 object Missing = Type.Missing; IPolygon polygon = new PolygonClass(); IPointCollection pointCollection = polygon as IPointCollection; IPoint point = new PointClass(); point.PutCoords(5, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(5, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); polygon.SimplifyPreserveFromTo(); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(simpleFillSymbol as ISymbol); activeView.ScreenDisplay.DrawPolygon(polygon as IGeometry); activeView.ScreenDisplay.FinishDrawing(); } private void lineFillSymbolToolStripMenuItem_Click(object sender, EventArgs e) { ICartographicLineSymbol cartoLine = new CartographicLineSymbol(); cartoLine.Cap = esriLineCapStyle.esriLCSButt; cartoLine.Join = esriLineJoinStyle.esriLJSMitre; cartoLine.Color = getRGB(255, 0, 0); cartoLine.Width = 2; //Create the LineFillSymbo ILineFillSymbol lineFill = new LineFillSymbol(); lineFill.Angle = 45; lineFill.Separation = 10; lineFill.Offset = 5; lineFill.LineSymbol = cartoLine; object Missing = Type.Missing; IPolygon polygon = new PolygonClass(); IPointCollection pointCollection = polygon as IPointCollection; IPoint point = new PointClass(); point.PutCoords(5, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(5, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); polygon.SimplifyPreserveFromTo(); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(lineFill as ISymbol); activeView.ScreenDisplay.DrawPolygon(polygon as IGeometry); activeView.ScreenDisplay.FinishDrawing(); } private void markerFillSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IArrowMarkerSymbol arrowMarkerSymbol = new ArrowMarkerSymbolClass(); IRgbColor rgbColor = getRGB(255, 0, 0); arrowMarkerSymbol.Color = rgbColor as IColor; arrowMarkerSymbol.Length = 10; arrowMarkerSymbol.Width = 10; arrowMarkerSymbol.Style = esriArrowMarkerStyle.esriAMSPlain; IMarkerFillSymbol markerFillSymbol = new MarkerFillSymbolClass(); markerFillSymbol.MarkerSymbol = arrowMarkerSymbol; rgbColor = getRGB(0, 255, 0); markerFillSymbol.Color = rgbColor; markerFillSymbol.Style = esriMarkerFillStyle.esriMFSGrid; IFillProperties fillProperties = markerFillSymbol as IFillProperties; fillProperties.XOffset = 2; fillProperties.YOffset = 2; fillProperties.XSeparation = 15; fillProperties.YSeparation = 20; object Missing = Type.Missing; IPolygon polygon = new PolygonClass(); IPointCollection pointCollection = polygon as IPointCollection; IPoint point = new PointClass(); point.PutCoords(5, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(5, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); polygon.SimplifyPreserveFromTo(); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(markerFillSymbol as ISymbol); activeView.ScreenDisplay.DrawPolygon(polygon as IGeometry); activeView.ScreenDisplay.FinishDrawing(); } private void gradientFillSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IGradientFillSymbol gradientFillSymbol = new GradientFillSymbolClass(); IAlgorithmicColorRamp algorithcColorRamp = new AlgorithmicColorRampClass(); algorithcColorRamp.FromColor = getRGB(255, 0, 0); algorithcColorRamp.ToColor = getRGB(0, 255, 0); algorithcColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm; gradientFillSymbol.ColorRamp = algorithcColorRamp; gradientFillSymbol.GradientAngle = 45; gradientFillSymbol.GradientPercentage = 0.9; gradientFillSymbol.Style = esriGradientFillStyle.esriGFSLinear; object Missing = Type.Missing; IPolygon polygon = new PolygonClass(); IPointCollection pointCollection = polygon as IPointCollection; IPoint point = new PointClass(); point.PutCoords(5, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(5, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); polygon.SimplifyPreserveFromTo(); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(gradientFillSymbol as ISymbol); activeView.ScreenDisplay.DrawPolygon(polygon as IGeometry); activeView.ScreenDisplay.FinishDrawing(); } private void pictureFillSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IPictureFillSymbol pictureFillSymbol = new PictureFillSymbolClass(); //创建图片符号 //string fileName = @"E:\vs2005\第五章\lesson2\lesson2\data\qq.bmp"; string path = Directory.GetCurrentDirectory(); string fileName = path + @"\qq.bmp"; pictureFillSymbol.CreateFillSymbolFromFile(esriIPictureType.esriIPictureBitmap, fileName); pictureFillSymbol.Color = getRGB(0, 255, 0); ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass(); simpleLineSymbol.Style = esriSimpleLineStyle.esriSLSDashDotDot; simpleLineSymbol.Color = getRGB(255, 0, 0); ISymbol symbol = pictureFillSymbol as ISymbol; symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; pictureFillSymbol.Outline = simpleLineSymbol; pictureFillSymbol.Angle = 45; object Missing = Type.Missing; IPolygon polygon = new PolygonClass(); IPointCollection pointCollection = polygon as IPointCollection; IPoint point = new PointClass(); point.PutCoords(5, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(5, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); polygon.SimplifyPreserveFromTo(); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(pictureFillSymbol as ISymbol); activeView.ScreenDisplay.DrawPolygon(polygon as IGeometry); activeView.ScreenDisplay.FinishDrawing(); } private void multilayerFillSymbolToolStripMenuItem_Click(object sender, EventArgs e) { IMultiLayerFillSymbol multiLayerFillSymbol = new MultiLayerFillSymbolClass(); IGradientFillSymbol gradientFillSymbol = new GradientFillSymbolClass(); IAlgorithmicColorRamp algorithcColorRamp = new AlgorithmicColorRampClass(); algorithcColorRamp.FromColor = getRGB(255, 0, 0); algorithcColorRamp.ToColor = getRGB(0, 255, 0); algorithcColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm; gradientFillSymbol.ColorRamp = algorithcColorRamp; gradientFillSymbol.GradientAngle = 45; gradientFillSymbol.GradientPercentage = 0.9; gradientFillSymbol.Style = esriGradientFillStyle.esriGFSLinear; ICartographicLineSymbol cartoLine = new CartographicLineSymbol(); cartoLine.Cap = esriLineCapStyle.esriLCSButt; cartoLine.Join = esriLineJoinStyle.esriLJSMitre; cartoLine.Color = getRGB(255, 0, 0); cartoLine.Width = 2; //Create the LineFillSymbo ILineFillSymbol lineFill = new LineFillSymbol(); lineFill.Angle = 45; lineFill.Separation = 10; lineFill.Offset = 5; lineFill.LineSymbol = cartoLine; multiLayerFillSymbol.AddLayer(gradientFillSymbol); multiLayerFillSymbol.AddLayer(lineFill); object Missing = Type.Missing; IPolygon polygon = new PolygonClass(); IPointCollection pointCollection = polygon as IPointCollection; IPoint point = new PointClass(); point.PutCoords(5, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(5, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 10); pointCollection.AddPoint(point, ref Missing, ref Missing); point.PutCoords(10, 5); pointCollection.AddPoint(point, ref Missing, ref Missing); polygon.SimplifyPreserveFromTo(); IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(multiLayerFillSymbol as ISymbol); activeView.ScreenDisplay.DrawPolygon(polygon as IGeometry); activeView.ScreenDisplay.FinishDrawing(); }
四、TextSymbol对象
用于修饰文字元素，实现ITextSymbol，ISimpleTextSymbol，IFormattedTextSymbol接口。
ITextSymbol是定义文本字符对象的主要接口，通过IFontDisp接口来设置字体的大小、粗体、斜体等。
ISimpleTextSymbol
BezierTextPath对象可以让文字的路径按照贝塞尔曲线设置。
ITextPath接口提供用来计算每个字符文字路径的位置。
IFormattedTextSymbol接口用来设置背景对象、阴影等属性
private void textSybmolToolStripMenuItem_Click(object sender, EventArgs e) { ITextSymbol textSymbol = new TextSymbolClass(); System.Drawing.Font drawFont = new System.Drawing.Font("宋体", 16, FontStyle.Bold); stdole.IFontDisp fontDisp = (stdole.IFontDisp)(new stdole.StdFontClass()); textSymbol.Font = fontDisp; textSymbol.Color = getRGB(0, 255, 0); textSymbol.Size = 20; IPolyline polyline = new PolylineClass(); IPoint point = new PointClass(); point.PutCoords(1, 1); polyline.FromPoint = point; point.PutCoords(10, 10); polyline.ToPoint = point; ITextPath textPath = new BezierTextPathClass(); //创建简单标注 ILineSymbol lineSymbol = new SimpleLineSymbolClass(); lineSymbol.Color = getRGB(255, 0, 0); lineSymbol.Width = 5; ISimpleTextSymbol simpleTextSymbol = textSymbol as ISimpleTextSymbol; simpleTextSymbol.TextPath = textPath; object oLineSymbol = lineSymbol; object oTextSymbol = textSymbol; IActiveView activeView = this.axMapControl1.ActiveView; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(oLineSymbol as ISymbol); activeView.ScreenDisplay.DrawPolyline(polyline as IGeometry); activeView.ScreenDisplay.SetSymbol(oTextSymbol as ISymbol); activeView.ScreenDisplay.DrawText(polyline as IGeometry, "简单标注"); ; activeView.ScreenDisplay.FinishDrawing(); //创建气泡标注（两中风格，一种是有锚点，一种是marker方式） //锚点方式 ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass(); simpleFillSymbol.Color = getRGB(0, 255, 0); simpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid; IBalloonCallout balloonCallout = new BalloonCalloutClass(); balloonCallout.Style = esriBalloonCalloutStyle.esriBCSRectangle; balloonCallout.Symbol = simpleFillSymbol; balloonCallout.LeaderTolerance = 10; point.PutCoords(5, 5); balloonCallout.AnchorPoint = point; IGraphicsContainer graphicsContainer = activeView as IGraphicsContainer; IFormattedTextSymbol formattedTextSymbol = new TextSymbolClass(); formattedTextSymbol.Color = getRGB(0, 0, 255); point.PutCoords(10, 5); ITextBackground textBackground = balloonCallout as ITextBackground; formattedTextSymbol.Background = textBackground; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(formattedTextSymbol as ISymbol); activeView.ScreenDisplay.DrawText(point as IGeometry, "气泡1"); activeView.ScreenDisplay.FinishDrawing(); //marker方式 textSymbol = new TextSymbolClass(); textSymbol.Color = getRGB(255, 0, 0); textSymbol.Angle = 0; textSymbol.RightToLeft = false; textSymbol.VerticalAlignment = esriTextVerticalAlignment.esriTVABaseline; textSymbol.HorizontalAlignment = esriTextHorizontalAlignment.esriTHAFull; IMarkerTextBackground markerTextBackground = new MarkerTextBackgroundClass(); markerTextBackground.ScaleToFit = true; markerTextBackground.TextSymbol = textSymbol; IRgbColor rgbColor = new RgbColorClass(); IPictureMarkerSymbol pictureMarkerSymbol = new PictureMarkerSymbolClass(); //string fileName = @"E:\vs2005\第五章\lesson2\lesson2\data\qq.bmp"; string path = Directory.GetCurrentDirectory(); string fileName = path + @"\qq.bmp"; pictureMarkerSymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPictureBitmap, fileName); pictureMarkerSymbol.Angle = 0; pictureMarkerSymbol.BitmapTransparencyColor = rgbColor; pictureMarkerSymbol.Size = 20; pictureMarkerSymbol.XOffset = 0; pictureMarkerSymbol.YOffset = 0; markerTextBackground.Symbol = pictureMarkerSymbol as IMarkerSymbol; formattedTextSymbol = new TextSymbolClass(); formattedTextSymbol.Color = getRGB(255, 0, 0); fontDisp.Size = 10; fontDisp.Bold = true; formattedTextSymbol.Font = fontDisp; point.PutCoords(15, 5); formattedTextSymbol.Background = markerTextBackground; activeView.ScreenDisplay.StartDrawing(activeView.ScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache); activeView.ScreenDisplay.SetSymbol(formattedTextSymbol as ISymbol); activeView.ScreenDisplay.DrawText(point as IGeometry, "气泡2"); activeView.ScreenDisplay.FinishDrawing(); }
五、3DChartSymbol对象
是一个抽象类，有三个子类：BarChart（用来着色）、PieChart、StaekedChart。
它实现多个接口：IChartSymbol、IBarChartSymbol、IPieChartSymbol和IStackedSymbol等。
IChartSymbol接口主要用于计算一个ChartSymbol对象中的柱状和饼状部分的尺寸，其中Maximum值是创建3DChartSymbol对象后必须设置的一个属性，着色一般在一个要素图层上进行，因而可以从它的要素类中获得一系列的数值统计值。如果有三个数值参与着色，系统则必须对三个数值进行大小比较，找出最大的那个赋值给Maximum。Value属性用数组来设置柱状高度或饼状宽度。可以用ISymbolArray来管理多个参与着色的符号对象。
BarChartSymbol对象实现IBarChartSymbol接口，用不同类型的柱子代表一个要素中的不同属性，高度取决于属性值得大小。
PieChartSymbol对象实现IPieChartSymbol接口，用一个饼图来显示一个要素中的不同属性，不同属性按照他们的数值大小，占有不同比例的扇形区域。
StackedSymbol对象实现IStackedSymbol接口，堆积的柱子表示一个要素中的不同属性，Fixed属性为true时，每个柱子的高度都一样，false时，柱子尺寸根据要素类的属性来计算得出。
[转] Symbol对象
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