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

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/