arcengine 将地图文件保存为图片(包括各种图片格式）

1，最近做了个地图文件输出图片的功能，思想主要就是利用MapControl的ActiveView中的out方法：

2代码如下：欢迎交流指正

             SaveFileDialog m_save = new SaveFileDialog();
             m_save.Filter = "jpeg图片(*.jpg)|*.jpg|tiff图片(*.tif)|*.tif|bmp图片(*.bmp)|*.bmp|emf图片(*.emf)|*.emf|png图片(*.png)|*.png|gif图片(*.gif)|*.gif";
             m_save.ShowDialog();
             string Outpath = m_save.FileName;
             if (Outpath != "")
             {
                 //分辨率
                 double resulotion = MapControl.ActiveView.ScreenDisplay.DisplayTransformation.Resolution;
                 IExport m_export = null;
                 if (Outpath.EndsWith(".jpg"))
                 {
                     m_export = new ExportJPEG() as IExport;

                 }
                 else if (Outpath.EndsWith(".tig"))
                 {
                     m_export = new ExportTIFF() as IExport;

                 }
                 else if (Outpath.EndsWith(".bmp"))
                 {
                     m_export = new ExportBMP() as IExport;

                 }
                 else if (Outpath.EndsWith(".emf"))
                 {
                     m_export = new ExportEMF() as IExport;
                 }
                 else if (Outpath.EndsWith(".png"))
                 {
                     m_export = new ExportPNG() as IExport;
                 }
                 else if (Outpath.EndsWith(".gif"))
                 {
                     m_export = new ExportGIF() as IExport;
                 }
                 //设置输出的路径
                 m_export.ExportFileName = Outpath;
                 //设置输出的分辨率
                 m_export.Resolution = resulotion;
                 tagRECT piexPound;
                 piexPound = MapControl.ActiveView.ScreenDisplay.DisplayTransformation.get_DeviceFrame();
                 IEnvelope m_envelope = new Envelope() as IEnvelope;
                 m_envelope.PutCoords(piexPound.left, piexPound.bottom, piexPound.right, piexPound.top);
                 //设置输出的IEnvelope
                 m_export.PixelBounds = m_envelope;

                 ITrackCancel m_trackCancel = new CancelTracker();
                 //输出的方法
                 MapControl.ActiveView.Output(m_export.StartExporting(), (short)resulotion, ref piexPound, MapControl.ActiveView.Extent, m_trackCancel);
                 m_export.FinishExporting();