public ActionResult Edit(Drawing newDrawing, HttpPostedFileBase drawingImageFile, string canvasImage)
{
if (ModelState.IsValid)
{
Drawing drawing = m_drawingsService.Get(newDrawing.Id);
drawing = FillDrawing(drawing, drawingImageFile, canvasImage);
if (drawing != null)
{
m_drawingsService.Update(drawing);
return RedirectToAction("Index");
}
}
return View(newDrawing);
}
private Drawing FillDrawing(Drawing newDraw, HttpPostedFileBase drawingImage, string canvasImage)
{
TryUpdateModel(newDraw);
if (ModelState.IsValid)
{
if (drawingImage != null)
{
newDraw.ImageContentType = drawingImage.ContentType;
newDraw.Image = new byte[drawingImage.ContentLength];
drawingImage.InputStream.Read(newDraw.Image, 0, drawingImage.ContentLength);
return newDraw;
}
else if (canvasImage != null)
{
Regex expr = new Regex("data:(.*);base64,(.*)");
MatchCollection matches = expr.Matches(canvasImage);
if (matches.Count == 1 && matches[0].Groups.Count == 3)
{
// first group in match is the whole text
newDraw.ImageContentType = matches[0].Groups[1].Value;
newDraw.Image = Convert.FromBase64String(matches[0].Groups[2].Value);
return newDraw;
}
}
}
return null;
}