MapControl控件AddLayer出现错误-引发类型为“System.Windows.Forms.AxHost+InvalidActiveXStateException”的异常

出错代码：

 AxMapControl pMptrl = new AxMapControl();
            //add data
            string mdbPath = string.Format("{0}\\line.mdb", Application.StartupPath);
            IWorkspaceFactory pWFS = new AccessWorkspaceFactoryClass();
            IWorkspace pWS = pWFS.OpenFromFile(mdbPath, 0);
            if (pWS != null)
            {
                IFeatureWorkspace pFWK = pWS as IFeatureWorkspace;
                IFeatureClass pFC = pFWK.OpenFeatureClass("ZXLine");
                IFeatureLayer pFlyr = new FeatureLayerClass();
                pFlyr.FeatureClass = pFC;
                pMptrl.AddLayer(pFlyr as ILayer);
                m_FeatureLayer = pFlyr;
            }

错误原因是未将控件添加至窗体并注册初始化，改为如下即可：

 Form f = new Form();
            AxMapControl pMptrl = new AxMapControl();
            ((System.ComponentModel.ISupportInitialize)(pMptrl)).BeginInit();
            f.Controls.Add(pMptrl);
            ((System.ComponentModel.ISupportInitialize)(pMptrl)).EndInit();