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#1 Posted : Thursday, September 6, 2012 7:14:01 AM(UTC)

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I'm trying to save my (layered) canvas to an image and then use the resulting image as the source for an image elsewhere on my page (e.g. <img src="my_canvas_image.png" alt="some_text"/>. I have used the remote scripting method to save the canvas to an image like so:

Dim bmp As Aurigma.GraphicsMill.Bitmap = _canvasViewer.Canvas.RenderWorkspace(dpi, Aurigma.GraphicsMill.ColorSpace.Rgb)
   bmp.Transforms.Resize(width, height)
   bmp.Save("my_canvas_image.png", New Aurigma.GraphicsMill.Codecs.PngEncoderOptions(True))

however the javascript code $('#my_image')attr('src', 'my_canvas_image.png'); that I execute after the invokeRemoteMethod on the client executes before the image is generated so it never shows.

To get around this timing issue I tried making an ajax call and passing in the serialized canvas data to a PageMethod and populating it with the serialized data, but I don't know if it's possible. I tried using various things based on the following approach but I kept getting errors. Is this possible?

<WebMethod()> _
Public Shared Function MyMethod(ByVal serializedData As String) As String
   Dim fileName As String = "random_image_name.png"
   Dim cv As New Aurigma.GraphicsMill.AjaxControls.CanvasViewer
   cv...etc ' try to recreate canvas using serializedData
   Dim bmp As Aurigma.GraphicsMill.Bitmap = cv.Canvas.RenderWorkspace....etc
   return fileName ' use client side
End Function


Edited by user Thursday, September 6, 2012 7:15:04 AM(UTC)  | Reason: Not specified

#2 Posted : Friday, September 7, 2012 1:21:14 AM(UTC)

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Hello Norman,

Unfortunately, there is no way to achieve it. Saving image takes some time. Therefore using remote script method is unsuitable in the case you described. I would like to recommend you to use post back. It will also allow to update an image you in the <img /> tag.
Best regards,
Dmitry Obukhov
Technical Support. Aurigma, Inc.
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