c#chart.object来自excel,为.png低分辨率

时间:2017-03-30 21:48:57

标签: c# excel png resolution

我创建了一个excel文件,并希望将其内容导出为png或jpeg文件。

不幸的是,图像的质量非常低。

有解决方案吗?我希望有一张非常高分辨率的照片。

谢谢

我目前的代码(来自互联网):

     Excel.Range xlRange = xlWorksheet5.get_Range("A1", "K30");
        xlRange.CopyPicture(Excel.XlPictureAppearance.xlScreen, Excel.XlCopyPictureFormat.xlPicture);
        Excel.ChartObject chartObj;
        chartObj = xlWorksheet5.ChartObjects().Add(xlRange.Left, xlRange.Top, xlRange.Width, xlRange.Height);
        chartObj.Activate(); 
        string path_image = path + "\\image.png";
        Excel.Chart chart = chartObj.Chart;
        chart.Paste();
        chart.Export(path_image);

1 个答案:

答案 0 :(得分:1)

试试这个。你需要在你运行它的任何线程的入口点上放置一个[STAThread]属性。

    //This first copy/paste is to convert from chart to image
    chartObj.CopyPicture();
    xlWorksheet5.Paste();

    //This image has decent resolution
    xlWorksheet5.Shapes.Item(xlWorksheet5.Shapes.Count).Copy();

    //Save the image
    System.Windows.Media.Imaging.BitmapEncoder enc = new System.Windows.Media.Imaging.BmpBitmapEncoder();
    enc.Frames.Add(System.Windows.Media.Imaging.BitmapFrame.Create(System.Windows.Clipboard.GetImage()));
    using (System.IO.MemoryStream outStream = new System.IO.MemoryStream())
    {
        enc.Save(outStream);
        System.Drawing.Image pic = new System.Drawing.Bitmap(outStream);
        pic.Save("image.png");
    }