private void OnLoadImage(object sender, EventArgs e)
{
// get file name to decode
OpenFileDialog Dialog = new OpenFileDialog
{
Filter = "Image Files(*.png;*.jpg;*.gif;*.tif)|*.png;*.jpg;*.gif;*.tif;*.bmp)|All files (*.*)|*.*",
Title = "Load QR Code Image",
InitialDirectory = Directory.GetCurrentDirectory(),
RestoreDirectory = true,
FileName = string.Empty
};
// display dialog box
if (Dialog.ShowDialog() != DialogResult.OK)
{
return;
}
// clear parameters
ImageFileLabel.Text = Dialog.FileName;
// disable buttons
LoadImageButton.Enabled = false;
// dispose previous image
if (QRCodeInputImage != null)
{
QRCodeInputImage.Dispose();
}
// load image to bitmap
QRCodeInputImage = new Bitmap(Dialog.FileName);
// trace
#if DEBUG
QRCodeTrace.Format("****");
QRCodeTrace.Format("Decode image: {0} ", Dialog.FileName);
QRCodeTrace.Format("Image width: {0}, Height: {1}", QRCodeInputImage.Width, QRCodeInputImage.Height);
#endif
// decode image
byte[][] DataByteArray = QRCodeDecoder.ImageDecoder(QRCodeInputImage);
// display ECI value
ECIValueLabel.Text = QRCodeDecoder.ECIAssignValue >= 0 ? QRCodeDecoder.ECIAssignValue.ToString() : null;
// convert results to text
DataTextBox.Text = QRCodeResult(DataByteArray);
// enable buttons
LoadImageButton.Enabled = true;
// force repaint
Invalidate();
return;
}
private void QRCodeTimer_Tick(object sender, EventArgs e)
{
QRCodeTimer.Enabled = false;
Bitmap QRCodeImage;
try
{
QRCodeImage = VideoCamera.SnapshotSourceImage();
// trace
#if DEBUG
QRCodeTrace.Format("Image width: {0}, Height: {1}", QRCodeImage.Width, QRCodeImage.Height);
#endif
}
catch (Exception EX)
{
DataTextBox.Text = "Decode exception.\r\n" + EX.Message;
QRCodeTimer.Enabled = true;
return;
}
// decode image
byte[][] DataByteArray = Decoder.ImageDecoder(QRCodeImage);
string Text = QRCodeResult(DataByteArray);
// dispose bitmap
QRCodeImage.Dispose();
// we have no QR code
if (Text.Length == 0)
{
QRCodeTimer.Enabled = true;
return;
}
VideoCamera.PauseGraph();
DataTextBox.Text = Text;
ResetButton.Enabled = true;
if (IsValidUri(DataTextBox.Text))
{
GoToUriButton.Enabled = true;
}
return;
}