ArcMap C# 在选定图层中绘制折线答案

【问题标题】：ArcMap C# drawing polylines in selected layerArcMap C# 在选定图层中绘制折线
【发布时间】：2013-12-25 00:11:12
【问题描述】：

public void OnMouseDown(int Button, int Shift, int X, int Y)
{
  IMxDocument mxDoc = m_App.Document as IMxDocument;
  IActiveView activeView = mxDoc.FocusMap as IActiveView;
  IScreenDisplay screenDisplay = activeView.ScreenDisplay;

  ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass();
  IRgbColor rgbColor = new RgbColorClass();
  rgbColor.Red = 255;
  lineSymbol.Color = rgbColor;

  IRubberBand rubberLine = new RubberLineClass();
  IPolyline newPolyline = (IPolyline)rubberLine.TrackNew(screenDisplay, (ISymbol)lineSymbol);

  screenDisplay.StartDrawing(screenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache);
  screenDisplay.SetSymbol((ISymbol)lineSymbol);
  screenDisplay.DrawPolyline(newPolyline);
  screenDisplay.FinishDrawing();    
}

这是绘制折线的功能。但我希望折线会自动存储在“线”层中，这可能吗？

【问题讨论】：

标签： c# arcgis polyline arcmap

【解决方案1】：

你的问题有点不清楚。您的“线条”图层是否已经存在？

如果您希望您的图层成为要素图层而不是图形图层，则在工作空间中创建要素类，然后像这样将您的线对象添加到其中（对不起，它在 vb.net 中）：

Dim pFeature as IFeature
pFeature = pFeatureClass.CreateFeature()
pFeature.Shape = newPolyline
pFeature.Store()

然后从您的要素类创建一个要素图层并将其添加到地图中：

Dim pFeatureLayer as IFeatureLayer
pFeatureLayer.FeatureClass = pFeatureClass
pFeatureLayer.Name = "Lines"
Dim pMap as IMap = pMxDoc.FocusMap
pMap.AddLayer(pFeatureLayer)

【讨论】：