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Hello,

This question is related to this discussion :
https://www.scichart.com/questions/wpf/export-chart-with-heatmapcolormap

I want to export a chart as XPS and have the HeatmapColorMap on the XPS. I put the HeatmapColorMap inside a CustomAnnotation. I had an issue with the ticks and labels not appearing on the printed XPS so I was advised to use a workaround :

public class SciChartSurfaceEx : SciChartSurface
{
    protected override SciChartSurfaceBase CreateCloneOfSurfaceInMemory(Size newSize)
    {
        // Grab custom annotation that stores HeatmapColormap on a real chart
        var originalColormapAnnotation = (CustomAnnotation)this.Annotations.Where(x => x.GetType() == typeof(CustomAnnotation)).FirstOrDefault();
        var originalColorMap = originalColormapAnnotation.Content as HeatmapColorMap;

        // Perform exporting functionality(serializing\deserializing)
        var cloned = (SciChartSurface)base.CreateCloneOfSurfaceInMemory(newSize);

        var newWindow = new Window();
        newWindow.Content = cloned;
        newWindow.Show();
        newWindow.Close();

        return cloned;
    }
}

Opening a new window is a workaround to prevent the HeatmapColorMap from disappearing after exporting, because it disappears otherwise.
This works fine when exporting a PNG at non-default size but it does not work when exporting as XPS. I get the following exception :

System.InvalidOperationException: ‘Specified element is already the logical child of another element. Disconnect it first.’

Why do I have this exception ? Is there any way around it ?
There are quite a few bugs when exporting charts, it would be nice to have them fixed.

Thank you in advance !

Version
6.5.0.13720
  • Oleksandr Shvets
    Hello Renaud, Thanks for your inquiry. Could you please send us a small sample project reproducing this issue for investigation? It can be based on our examples from the Examples suite. Thanks in advance. With best regards, Oleksandr
  • Renaud Danniau
    Hello Oleksandr, Thanks for you answer. How should I post the sample projet if the size of ZIP file exceeds 1MB ?
  • Oleksandr Shvets
    Hello Renaud, Yes, it’s acceptable file size. You can also submit a support request here if you don’t wish to post the project publicly: https://support.scichart.com/index.php?/Tickets/Submit With best regards, Oleksandr
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Hello Renaud,

Thanks for your inquiry. I am sorry for the late reply.
In order to export Heatmap and HeatmapColorMap as the same image, HeatmapColorMap should be a child of the SciChartSurface you export.
Please take a look at the following forums thread for more info:
https://www.scichart.com/questions/wpf/exporting-heatmap-to-png-with-included-heatmapcolormap

Hope this helps,

With best regards,
Oleksandr

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Hello Oleksandr,

This works fine, thank you for your response !

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In order to export Heatmap and HeatmapColorMap as the same image, HeatmapColorMap should be a child of the SciChartSurface you export.
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