private void button1_Click(object sender, EventArgs e)
{
//用于将element添加到地图中。
IGraphicsContainer graphicsContainer = axMapControl1.Map as IGraphicsContainer;
IFeatureLayer lyr = axMapControl1.Map.get_Layer(0) as IFeatureLayer;
IFeatureCursor fc = lyr.FeatureClass.Search(null,true);
IFeature fea = fc.NextFeature();
IActiveView v = axMapControl1.Map as IActiveView;
while (fea != null)
{
//fea.ShapeCopy返回的是一个IGeometry类型的接口
ITopologicalOperator op = fea.ShapeCopy as ITopologicalOperator;
IGeometry bufferresult = op.Buffer(2000);
IElement ele = new PolygonElementClass();
//添加到图中显示
ele.Geometry = bufferresult;
graphicsContainer.AddElement(ele, 0);
v.Refresh();
fea = fc.NextFeature();
}
}
