.NET平台下专题地图实现的C#代码 private void 点密度图ToolStripMenuItem_Click(object sender, EventArgs e) { //获取当前图层 ，并把它设置成IGeoFeatureLayer的实例 IMap pMap = axMapControl1.Map ILayer pLayer = pMap.get_Layer(0) as IFeatureLayer IFeatureLay