[ArcGIS Engine][MFC/VS2008]判断图层是点图层、线图层还是面图层的方法

来源：互联网发布：华为手机知乎编辑：程序博客网时间：2024/06/06 16:30

在图层上做图之前，必须先了解需要做图的图层是属于点图层、线图层还是面图层，以便绘上相应的对象。要知道，我们无法在点图层画线，也无法在线图层画多边形。判断图层类型的方法很简单，主要用到IFeatureClassPtr接口的get_ShapeType方法，下面直接上代码：

//对话框的MapControl的变量名为m_MapCtrl。
HRESULT hr = 0;
ILayerPtr pILayer = m_MapCtrl.get_Layer(0);IFeatureLayerPtr pIFeatureLayer = (IFeatureLayerPtr)pILayer;IFeatureClassPtr pIFeatureClass;hr = pIFeatureLayer->get_FeatureClass(&pIFeatureClass);esriGeometryType LayarShapeType;pIFeatureClass->get_ShapeType(&LayarShapeType);if(LayarShapeType == esriGeometryPoint){MessageBox(_T("Layer of point"));}else if(LayarShapeType == esriGeometryMultipoint){MessageBox(_T("Layer of multipoint"));}else if(LayarShapeType == esriGeometryPolyline){MessageBox(_T("Layer of polyline"));}else if(LayarShapeType == esriGeometryMultiPatch){MessageBox(_T("Layer of multiPatch"));}else if(LayarShapeType == esriGeometryPolygon){MessageBox(_T("Layer of polygon"));}

转载于：http://celerysoft.blog.163.com/blog/static/213525082201499103324297/

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