ArcGIS Engine 中线加箭头

最新推荐文章于 2024-09-22 11:31:25 发布

转载最新推荐文章于 2024-09-22 11:31:25 发布 · 153 阅读

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原文链接：http://www.cnblogs.com/94cool/p/4363224.html

本文介绍如何在ArcGIS中通过编程方式为线要素添加带箭头的装饰。涉及关键步骤包括创建线符号、设置箭头样式、大小及颜色等属性，并将这些符号应用于地图上的几何对象。

  void AddArrowElement(IGeometry pGeometry, IActiveView pActiveView)
        {
            IRgbColor pColor = new RgbColorClass();
            pColor.Red = 255;

            ICartographicLineSymbol pCartoLineSymbol = new CartographicLineSymbolClass();
            pCartoLineSymbol.Cap = esriLineCapStyle.esriLCSRound;

            ILineProperties pLineProp = pCartoLineSymbol as ILineProperties;
            pLineProp.DecorationOnTop = true;

            ILineDecoration pLineDecoration = new LineDecorationClass();
            ISimpleLineDecorationElement pSimpleLineDecoElem = new SimpleLineDecorationElementClass();
            pSimpleLineDecoElem.AddPosition(1);
            IArrowMarkerSymbol pArrowMarkerSym = new ArrowMarkerSymbolClass();
            pArrowMarkerSym.Size = 8;
            pArrowMarkerSym.Color = pColor;
            pSimpleLineDecoElem.MarkerSymbol = pArrowMarkerSym as IMarkerSymbol;
            pLineDecoration.AddElement(pSimpleLineDecoElem as ILineDecorationElement);
            pLineProp.LineDecoration = pLineDecoration;

            ILineSymbol pLineSymbol = pCartoLineSymbol as ILineSymbol;

            pLineSymbol.Color = pColor;
            pLineSymbol.Width = 1;

            ILineElement pLineElem = new LineElementClass();
            pLineElem.Symbol = pLineSymbol;
            IElement pElem = pLineElem as IElement;
            pElem.Geometry = pGeometry;

            IGraphicsContainer pGraphicsContainer = mCtrl.Map as IGraphicsContainer;
            pGraphicsContainer.AddElement(pElem, 0);

            mCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
        }

转载于:https://www.cnblogs.com/94cool/p/4363224.html