Saving Screenshots

[hallo888]

Hi,

I saw in some other post that screenshot of charts can be saved using the following codes

Code: Select all

Bitmap bm = ChartTools.CaptureControlToBitmap(m_chart);
bm.Save("c:\\temp\\combined.bmp", System.Drawing.Imaging.ImageFormat.Bmp);

However, it seems like the CaptureContolToBitmap() function only takes in winform lightning chart. Is that correct? Is there any workaround for capturing screenshots of WPF chart control?

Thanks for your help.

[ArctionPasi]

You can simply use chart.SaveToFile("picture.bmp");

Works in both WPF and Winforms.

[hallo888]

You can simply use chart.SaveToFile("picture.bmp");

Works in both WPF and Winforms.

Hi Parsi,

Thanks for the code. It works. However i am encountering an issue. Just a little backgroud, my chart is declared in the xaml file and is not shown on application startup. User will have to explictly click on a button in order to show the chart. On application startup, when the chart is still hidden but with all the data for the chart initialised, i encounter an exception "Saving to file failed: Make sure you have defined a valid target path, with write permission".
However, saving of the screenshot succeeds if save it after showing the chart. Even if i were to hide the chart subsequently, i am also able to save the screenshot successfully.

May i know what is the problem with it? I have checked that the chart is not null and has been initialised with all the data on startup.

Please advise.

[ArctionPasi]

Hello,

The chart must have been appeared on the screen at least once, before calling SaveToFile method. Otherwise chart control doesn't get a window handle and Direct3D can't be instantiated.

We will improve the error message to give some hint regarding this scenario.

[hallo888]

Oh ok. Thanks for the reply.