ArcGIS二次开发基础教程(03)：保存文档和导出地图

//这里的path为全局变量 在打开文件获添加数据时赋值原路径
//判断打开文件是否为mxd文件 是则保存 不是则另存为
if(System.IO.File.Exists(path.Remove(path.IndexOf('.')) + ".mxd"))
{
    //对于已打开的mxd文档保存在原路径
    //获取mapcontrol中的地图数据
	IMXDContexts context = axMapControl.Map as IMXDContexts;
	IMapDocument mapDocumnet = new MapDocumnetClass();
	mapDocument.Open(path);
	mapDocument.ReplaceContexts(context);
	mapDocument.Save();
}
else
{
    SaveAs();
}

void SaveAs()
{
    //没有mxd文档的新建一个
	saveFileDialog.Title = "保存文件";
	saveFileDialog.Filter = "ArcMap Document(*.mxd)|*.mxd";
	if(saveFileDialog.ShowDialog()==DialogResult.OK)
	{
		IMXDContexts context = axMapControl.Map as IMXDContexts;
		IMapDocument mapDocumnet = new MapDocumnetClass();
		mapDocument.New(path);
		mapDocument.ReplaceContexts(context);
		mapDocument.Save();
	}
}

//将mapcontrol的显示范围导出为图片
saveFileDialog.Title = "导出图片";
//还有其他图片格式同理
saveFileDialog.Filter = "JPEG(*.jpg)|*.jpg|PNG(*.png)|*.png|PDF(*.pdf)|*.pdf|BMP(*.bmp)|*.bmp|TIFF(*.tif)|*.tif";
if(saveFileDialog.ShowDialog()==DialogResult.OK)
{
    IExport export = new ExportAllClass();
    string path = saveFileDialog.FileName;
    string extension = System.IO.Path.GetExtenion(path).Replace(".","").ToLower();
    switch(extension)
    {
        case "jpg":
            export = new ExportJPEGClass();
            break;
        case "png":
            export = new ExportPNGClass();
            break;
        case "pdf":
            export = new ExportPDFClass();
            break;
        case "bmp":
            export = new ExportBMPClass();
            break;
        case "tif":
            export = new ExportTIFFClass();
            break;
        default:
            MessageBox.Show("Error");
            return;
    }
    if(ExportImage(export,axMapConrol1.ActiveView,fileName))
    {
        MessageBox.Show("Succeed");
    }
    else
    {
        MessageBox.Show("Error");
    }
}
//这里是参考的帮助文档
bool ExportImage(IExport export,IActiveView activeView,string fileName)
{
  export.ExportFileName = fileName;

  // Microsoft Windows default DPI resolution
  export.Resolution = 96;
  // mapcontrol的显示范围
  tagRECT exportRECT = activeView.ExportFrame;
  IEnvelope envelope = new EnvelopeClass();
  envelope.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
  export.PixelBounds = envelope;
  Int32 hDC = export.StartExporting();
  activeView.Output(hDC, (Int16)export.Resolution, ref exportRECT, null, null);

  // Finish writing the export file and cleanup any intermediate files
  export.FinishExporting();
  export.Cleanup();

  return true;
}