Silverlight 4 OOB Get Image From Scanner

Here is a simple method you can use to retrieve a JPEG image from a scanner in your Silverlight 4 Out-Of-Browser application:  

public static WriteableBitmap GetImageFromScanner()
            {
                try
                {
                    using (dynamic CommonDialog = AutomationFactory.CreateObject("WIA.CommonDialog"))
                    {
                        const string wiaFormatJPEG = "{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}";
                        dynamic imageFile = CommonDialog.ShowAcquireImage(1, 2, 131072, wiaFormatJPEG, false, false, false);
                        if (imageFile != null)
                        {

                            if (imageFile.FormatID != wiaFormatJPEG)
                            {
                                dynamic ip = AutomationFactory.CreateObject("WIA.ImageProcess");
                                ip.Filters.Add(ip.FilterInfos("Convert").FilterID);
                                ip.Filters(1).Properties("FormatID").Value = wiaFormatJPEG;
                                ip.Filters(1).Properties("Quality").Value = 20;
                                imageFile = ip.Apply(imageFile);
                            }

                            BitmapImage bitmapBase = new BitmapImage();
                            dynamic fileData = imageFile.FileData;
                            byte[] imageData = fileData.BinaryData;
                            MemoryStream ms = new MemoryStream(imageData);
                            bitmapBase.SetSource(ms);
                            WriteableBitmap writeableBitmap = new WriteableBitmap(bitmapBase);
                            return writeableBitmap;
                        }
                    }
                }
                catch (System.Runtime.InteropServices.COMException ex)
                {

                    if (ex.ErrorCode == -2145320939)
                    {
                        MessageBox.Show("Could not find an attached scanner.", "Scanner Error", MessageBoxButton.OK);
                    }
                    else if (ex.ErrorCode == -2145320957)
                    {
                        MessageBox.Show("There is no paper in the scanner.", "Scanner Error", MessageBoxButton.OK);
                    }


                }

                return null;
            }

Tags: silverlight

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