ArcEngine 创建IElement简单例子 C#代码

柔光的暖阳◎ 2021-12-10 10:49 201阅读 0赞

![2010101920111455.png][]

代码下载地址:[http://files.cnblogs.com/ogis/MapControlApplication2.rar][http_files.cnblogs.com_ogis_MapControlApplication2.rar]

以下几个函数功能主要是向地图中添加IElement,一共四个函数:

GetColor,CreateSimpleLineSymbol,CreateSimpleFillSymbol,AddCreateElement

功能函数:AddCreateElement

调用例子:

ISymbol pSymbol = AEUtil.CreateSimpleFillSymbol(Color.Red, 100, esriSimpleFillStyle.esriSFSCross);  
AEUtil.AddCreateElement(pFeature.ShapeCopy, m\_MapControl.ActiveView, pSymbol, fucosKey);

通过red green blue 三色创建IRgbColor

public static IRgbColor GetColor(int r, int g, int b)  
\{  
RgbColor color = new RgbColor();  
color.Red = r;  
color.Green = g;  
color.Blue = b;  
return color;  
\}

创建简单线Symbol　　输入参数 color-颜色,width-宽度,style-线型,有七种线型可选

esriSLSSolid  
　　esriSLSDash  
　　esriSLSDot  
　　esriSLSDashDot  
　　esriSLSDashDotDot  
　　esriSLSNull  
　　esriSLSInsideFrame

public static ISymbol CreateSimpleLineSymbol(Color color, int width, esriSimpleLineStyle style)  
\{  
ISimpleLineSymbol pSimpleLineSymbol;  
pSimpleLineSymbol = new SimpleLineSymbol();  
pSimpleLineSymbol.Width = width;  
pSimpleLineSymbol.Color = GetColor(color.R, color.G, color.B);  
pSimpleLineSymbol.Style = style;  
return (ISymbol)pSimpleLineSymbol;

创建面填充ISymbol对象. 　　fillColor-颜色,oLineWidth-外廓线宽,fillStyle-填充类型,有以下可选

esriSFSSolid  
　　esriSFSNull  
　　esriSFSHollow  
　　esriSFSHorizontal  
　　esriSFSVertical  
　　esriSFSForwardDiagonal  
　　esriSFSBackwardDiagonal  
　　esriSFSCross  
　　esriSFSDiagonalCross

public static ISymbol CreateSimpleFillSymbol(Color fillColor, int oLineWidth, esriSimpleFillStyle fillStyle)  
\{  
ISimpleFillSymbol pSimpleFillSymbol;  
pSimpleFillSymbol = new SimpleFillSymbol();  
pSimpleFillSymbol.Style = fillStyle;  
pSimpleFillSymbol.Color = GetColor(fillColor.R, fillColor.G, fillColor.B);  
pSimpleFillSymbol.Outline = (ILineSymbol)CreateSimpleLineSymbol(fillColor, 1, esriSimpleLineStyle.esriSLSDash);  
return (ISymbol)pSimpleFillSymbol;

函数实现向地图中添加元素,pGeometry-元素形状,pActiveView-地图视图,pSymbol-符号,key-元素属性

public static IElement AddCreateElement(IGeometry pGeometry, IActiveView pActiveView, ISymbol pSymbol, string key)  
\{  
try  
\{  
IGraphicsContainer pGraphicsContainer = pActiveView.GraphicsContainer;  
IElement pElement = null;  
ILineElement pLineElement = null;  
IFillShapeElement pFillShapeElement = null;  
IMarkerElement pMarkerElement = null;  
ICircleElement pCircleElement = null;  
IElementProperties pElmentProperties = null;  
switch (pGeometry.GeometryType)  
\{

case esriGeometryType.esriGeometryEnvelope:  
\{  
pElement = new RectangleElement();  
pElement.Geometry = pGeometry;  
pFillShapeElement = (IFillShapeElement)pElement;  
pFillShapeElement.Symbol = (IFillSymbol)pSymbol;  
break;  
\}  
case esriGeometryType.esriGeometryPolyline:  
\{  
pElement = new LineElement();  
pElement.Geometry = pGeometry;

pLineElement = (ILineElement)pElement;  
pLineElement.Symbol = (ILineSymbol)pSymbol;  
break;  
\}  
case esriGeometryType.esriGeometryLine:  
\{  
pElement = new LineElement();  
pElement.Geometry = pGeometry;

pLineElement = (ILineElement)pElement;  
pLineElement.Symbol = (ILineSymbol)pSymbol;  
break;  
\}  
case esriGeometryType.esriGeometryPolygon:  
\{  
pElement = new PolygonElement();  
pElement.Geometry = pGeometry;  
pFillShapeElement = (IFillShapeElement)pElement;

pFillShapeElement.Symbol = (IFillSymbol)pSymbol;  
break;  
\}  
case esriGeometryType.esriGeometryMultipoint:  
case esriGeometryType.esriGeometryPoint:  
\{  
pElement = new MarkerElement();  
pElement.Geometry = pGeometry;

pMarkerElement = (IMarkerElement)pElement;

pMarkerElement.Symbol = (IMarkerSymbol)pSymbol;  
break;  
\}  
case esriGeometryType.esriGeometryCircularArc:  
\{  
pElement = new CircleElementClass();  
pElement.Geometry = pGeometry;

pCircleElement = (ICircleElement)pElement;  
break;  
\}  
default:  
pElement = null;  
break;  
\}

if (pElement != null)  
\{  
pElmentProperties = pElement as IElementProperties;  
pElmentProperties.Name = key;

pGraphicsContainer.AddElement(pElement, 0);  
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewBackground, null, pGeometry.Envelope);  
return pElement;  
\}  
else  
\{  
return null;  
\}  
\}  
catch (Exception ex)  
\{  
return null;  
\}  
\}

转载于:https://www.cnblogs.com/ogis/archive/2010/10/19/1855638.html

[2010101920111455.png]: /images/20211210/917cc28b9ae744d0996b0a1eced0609e.png
[http_files.cnblogs.com_ogis_MapControlApplication2.rar]: http://files.cnblogs.com/ogis/MapControlApplication2.rar