private async void StartButton_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog()
{
Title = "Browse Text Files",
CheckFileExists = true,
CheckPathExists = true,
Filter = "All files (*.*)|*.*",
FilterIndex = 2,
RestoreDirectory = true,
ReadOnlyChecked = true,
ShowReadOnly = true
};
try
{
var textToHide = TextToHideTextBox.Text;
if (string.IsNullOrWhiteSpace(textToHide))
{
throw new ArgumentNullException("Text to hide cannot be empty\nTry again");
}
if (textToHide.Length > 255)
{
throw new ArgumentOutOfRangeException("Text is too long\nMaximum length is 255 chars\nTry again");
}
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
Bitmap inputBitmap = new Bitmap(openFileDialog.FileName);
InputPictureBox.Image = inputBitmap;
InputPictureBox.SizeMode = PictureBoxSizeMode.StretchImage;
Bitmap bitmapWithHiddenText = await SteganographyService.HideText(textToHide, inputBitmap);
ImageWithText.Image = bitmapWithHiddenText;
ImageWithText.SizeMode = PictureBoxSizeMode.StretchImage;
bitmapWithHiddenText.Save("BitmapWithText.png");
HiddenTextBox.Text = await SteganographyService.ExtractHiddenText(bitmapWithHiddenText);
}
}
catch (Exception ex)
{
MessageBox.Show($"Error occured during processing\n{ex.Message}", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
public MainWindow()
{
InitializeComponent();
cipher = new Cipher();
steganography = new SteganographyService(cipher);
}