c# chart.object from excel as .png 低分辨率

Question

我创建了一个 excel 文件并想将其内容导出为 png 或 jpeg 文件。

遗憾的是图像质量真的很低。

有解决办法吗？我想要一个非常高分辨率的图片。

谢谢

我当前的代码（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);

Answer 1

试试这个。您需要将 [STAThread] 属性放在您运行所在的任何线程的入口点上。

    //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");
    }

c# chart.object from excel as .p​​ng 低分辨率

c# chart.object from excel as .png low resolution

c#

excel

png

resolution

c# chart.object from excel as .png 低分辨率