protected void TransferPictures() { if (DataSource.SourceId.Id == 0) { return; } PendingXfers pendingTransfer = new PendingXfers(); TwainResult result; try { do { pendingTransfer.Count = 0; IntPtr hbitmap = IntPtr.Zero; // Get the image info ImageInfo imageInfo = new ImageInfo(); result = Twain32Native.DsImageInfo( ApplicationId, DataSource.SourceId, DataGroup.Image, DataArgumentType.ImageInfo, Message.Get, imageInfo); if (result != TwainResult.Success) { DataSource.Close(); break; } // Transfer the image from the device result = Twain32Native.DsImageTransfer( ApplicationId, DataSource.SourceId, DataGroup.Image, DataArgumentType.ImageNativeXfer, Message.Get, ref hbitmap); if (result != TwainResult.XferDone) { DataSource.Close(); break; } // End pending transfers result = Twain32Native.DsPendingTransfer( ApplicationId, DataSource.SourceId, DataGroup.Control, DataArgumentType.PendingXfers, Message.EndXfer, pendingTransfer); if (result != TwainResult.Success) { DataSource.Close(); break; } if (hbitmap == IntPtr.Zero) { //log.Warn("Transfer complete but bitmap pointer is still null."); } else { using (var renderer = new BitmapRenderer(hbitmap)) { TransferImageEventArgs args = new TransferImageEventArgs(renderer.RenderToBitmap(), pendingTransfer.Count != 0); TransferImage(this, args); if (!args.ContinueScanning) break; } } } while (pendingTransfer.Count != 0); } finally { // Reset any pending transfers result = Twain32Native.DsPendingTransfer( ApplicationId, DataSource.SourceId, DataGroup.Control, DataArgumentType.PendingXfers, Message.Reset, pendingTransfer); } }
protected void TransferPictures() { if (DataSource.SourceId.Id == 0) { return; } PendingXfers pendingTransfer = new PendingXfers(); TwainResult result; try { do { pendingTransfer.Count = 0; IntPtr hbitmap = IntPtr.Zero; // Get the image info ImageInfo imageInfo = new ImageInfo(); result = Twain32Native.DsImageInfo( ApplicationId, DataSource.SourceId, DataGroup.Image, DataArgumentType.ImageInfo, Message.Get, imageInfo); if (result != TwainResult.Success) { DataSource.Close(); break; } // Transfer the image from the device result = Twain32Native.DsImageTransfer( ApplicationId, DataSource.SourceId, DataGroup.Image, DataArgumentType.ImageNativeXfer, Message.Get, ref hbitmap); if (result != TwainResult.XferDone) { DataSource.Close(); break; } // End pending transfers result = Twain32Native.DsPendingTransfer( ApplicationId, DataSource.SourceId, DataGroup.Control, DataArgumentType.PendingXfers, Message.EndXfer, pendingTransfer); if (result != TwainResult.Success) { DataSource.Close(); break; } if (hbitmap == IntPtr.Zero) { //log.Warn("Transfer complete but bitmap pointer is still null."); } else { using (var renderer = new BitmapRenderer(hbitmap)) { TransferImageEventArgs args = new TransferImageEventArgs(renderer.RenderToBitmap(), pendingTransfer.Count != 0); TransferImage(this, args); if (!args.ContinueScanning) { break; } } } }while (pendingTransfer.Count != 0); } finally { // Reset any pending transfers result = Twain32Native.DsPendingTransfer( ApplicationId, DataSource.SourceId, DataGroup.Control, DataArgumentType.PendingXfers, Message.Reset, pendingTransfer); } }
private void Twain_TransferImage(object sender, TransferImageEventArgs e) { if (e.Image != null) { Image image = new Image(); image.Source = Imaging.CreateBitmapSourceFromHBitmap( new System.Drawing.Bitmap(e.Image).GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()); image.Margin = new Thickness(2); this.StackPanelImages.Children.Add(image); this.m_ImageList.Add(image); } }