ArcGIS Engine创建要素

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ArcGIS Engine创建要素

2023-09-02 00:12| 来源: 网络整理| 查看: 265

1、获取指定类型的图层

在创建要素之前，要获取相应的图层。

以下函数根据指定要素类型获取图层：

private IFeatureLayer getLayerByShape(esriGeometryType type) { int lyerNum = axMapControl1.LayerCount; IFeatureLayer resLayer = null; for (int i = 0; i < lyerNum; i++) { ILayer pLayer = axMapControl1.get_Layer(i); IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer; if (pFeatureLayer == null) { continue; } else { esriGeometryType thistype = pFeatureLayer.FeatureClass.GetFeature(1).Shape.GeometryType; if (thistype == type) { resLayer = pFeatureLayer; } } } return resLayer; } 2、创建点要素

添加点的函数

private void addPoint(IPoint pPoint, IFeatureLayer pFeaLyr) { IFeatureClass pFeaClass = pFeaLyr.FeatureClass; IFeature pFeature = pFeaClass.CreateFeature(); pFeature.Shape = pPoint; pFeature.Store(); }

添加axMapControl的点击事件

IPoint pPoint = new PointClass(); pPoint.X = e.mapX; pPoint.Y = e.mapY; IFeatureLayer pFealyr = getLayerByShape(esriGeometryType.esriGeometryPoint); if (pFealyr != null) { addPoint(pPoint, pFealyr); } axMapControl1.ActiveView.Refresh(); 3、创建线要素

添加线的函数

private void addLine(IPolyline pLine, IFeatureLayer pFeatureLayer) { IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass; IFeature pFeature = pFeatureClass.CreateFeature(); pFeature.Shape = pLine; pFeature.Store(); }

添加axMapControl的点击事件

IPolyline polyline = axMapControl1.TrackLine() as IPolyline; IFeatureLayer pFeatureLayer = getLayerByShape(esriGeometryType.esriGeometryPolyline); if (pFeatureLayer != null) { addLine(polyline, pFeatureLayer); } axMapControl1.ActiveView.Refresh(); 4、创建面要素

添加面的函数

private void addPolygon(IPolygon pPolygon, IFeatureLayer pFeatureLayer) { IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass; IFeature pFeature = pFeatureClass.CreateFeature(); pFeature.Shape = pPolygon; pFeature.Store(); }

添加axMapControl的点击事件

IPolygon pPolygon = axMapControl1.TrackPolygon() as IPolygon; IFeatureLayer pFeatureLayer2 = getLayerByShape(esriGeometryType.esriGeometryPolygon); if (pFeatureLayer2 != null) { addPolygon(pPolygon, pFeatureLayer2); } axMapControl1.ActiveView.Refresh(); PS:网络对于创建线要素的影响

似乎由于效应网络的影响，有些线要素图层上，不能使用要素类的 Create方法直接创建，笔者直接使用 Create方法时，报错说：

不能在编辑会话之外更新此类中的对象

自己创建一个线要素图层，之后添加线要素成功。

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ArcGIS Engine创建要素

ArcGIS Engine创建要素

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