// This routine handles the Form's Load event, setting up the sample.
private void frmMain_Load(object sender, System.EventArgs e)
{
// Set the default crypto type.
crpSample = new SampleCrypto("Rijndael");
// Set the path to save the key file to the Solution root folder by stripping
// "bin" from the current directory.
string strCurrentDirectory = Environment.CurrentDirectory.Substring(
Environment.CurrentDirectory.Length - 2);
// Initialize paths for both types of key files.
strRijndaelSaltIVFile = strCurrentDirectory + "RijndaelSaltIV.dat";
strTripleDESSaltIVFile = strCurrentDirectory + "TripleDESSaltIV.dat";
// Set the current key file path to the key for default crypto type.
strCurrentKeyFile = strRijndaelSaltIVFile;
// Call Select() to put focus on the "Encrypt" button and prevent the text in
// the TextBox from being automatically highlighted.
btnEncrypt.Select();
FormHasLoaded = true;
}
// This routine handles the CheckedChanged event for the RadioButton controls.
private void RadioButtons_CheckedChanged(object sender, System.EventArgs e)
{
if (FormHasLoaded)
{
if (optRijndaelAdv.Checked)
{
crpSample = new SampleCrypto("Rijndael");
strCurrentKeyFile = strRijndaelSaltIVFile;
}
else
{
crpSample = new SampleCrypto("TripleDES");
strCurrentKeyFile = strTripleDESSaltIVFile;
}
}
}
