I have attached a sample project. In it the chart is automatically exported to image on page load, and saved in a memory stream for later use. You can save the image on your computer, by clicking the Export button to verify that it is correct.
Please note that this is not a supported scenario, so be sure to test it extensively.
In your project, basically you need to replace the UploadImageToServer
with your custom upload logic. In it you can use RadDocument, like it is demonstrated in this
help topic to export Word, PDF, etc. Here
you find an example of how to use WebClient to upload the file(s) to the server.
You can see for example how I have implemented the ExportButton_Click method, and it should be relatively simple to modify it as per your requirements.
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