How to read image byte while rendering a WPF Chart (SfChart)?

This article explains how to read a WPF Chart (SfChart) as a stream of bytes and save it in an image format during rendering. A FileStream supports both read and write operations. In this example, a chart is captured as a stream of bytes and saved as a PNG image. The RenderTargetBitmap class specifies the target chart's width, height, and pixel format. The PngBitmapEncoder is used to encode the image to PNG format. When the button is clicked, the rendered chart image is generated in the bin\Debug folder.

C#

private void ImageExport_Click(object sender, RoutedEventArgs e)
{          
  const string path = "Chart.png";
  RenderTargetBitmap renderBitmap = new RenderTargetBitmap((int)ScatterChart.ActualWidth, (int)ScatterChart.ActualHeight,70d, 70d, PixelFormats.Pbgra32);
  renderBitmap.Render(ScatterChart);
  using (FileStream ostream = new FileStream(path, FileMode.Create))
  {
    PngBitmapEncoder Bitmapencoder = new PngBitmapEncoder();
    Bitmapencoder.Frames.Add(BitmapFrame.Create(renderBitmap));
    // encoder.Save(outStream);
    ScatterChart.Save(ostream, Bitmapencoder);
  }
}

 Output

Conclusion

I hope you enjoyed learning about how to read image byte while rendering a WPF Chart(SfChart).

You can refer to our WPF Chart’s feature tour page to know about its other groundbreaking feature representations. You can also explore our   WPF Chart documentation to understand how to present and manipulate data.

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