转自IT-GIS终结者原文ArcEngine创建IElement简单例子

代码下载地址: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, , 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, );

            pActiveView.PartialRefresh(esriViewDrawPhase.esriViewBackground, null, pGeometry.Envelope);

            return pElement;

        }

        else

        {

            return null;

        }

    }

    catch (Exception ex)

    {

        return null;

    }

}

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 IRgbColor GetColor(int r, int g, int b)

{

    RgbColor color = new RgbColor();

    color.Red = r;

    color.Green = g;

    color.Blue = b;

    return color;

} 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, );

            pActiveView.PartialRefresh(esriViewDrawPhase.esriViewBackground, null, pGeometry.Envelope);

            return pElement;

        }

        else

        {

            return null;

        }

    }

    catch (Exception ex)

    {

        return null;

    }

}

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