/// <summary>
/// Do not allow the application to close if there are tasks running in the thread pool.
/// Encrypt the database if it is marked for encryption before exitting the application.
/// </summary>
private void Fec_Main_FormClosing(object sender, FormClosingEventArgs e)
{
// Do not continue if application is exitting.
if (exitting)
{
return;
}
if (jobCount > 0)
{
e.Cancel = true;
MessageBoxAdv.Show(this, "There are database tasks running. \n"
+ "Please wait until they are completed. \n"
+ "If you close the application before the tasks are completed "
+ "the database may become corrupted.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
// If there is a value stored in the password field of the database properties, then the database is to be encrypted.
if (DatabaseProperties.password.Length > 0)
{
EncryptingDatabaseForm encryptingDatabaseForm = new EncryptingDatabaseForm();
encryptingDatabaseForm.Show(this);
// Disable interaction with the main UI.
this.Enabled = false;
encryptionWorker.RunWorkerAsync(encryptingDatabaseForm);
// Cancel form closing so that background worker can execute.
e.Cancel = true;
}
}
/// <summary>
/// Close the specified EncryptingDatabaseForm in a thread-safe manner.
/// </summary>
/// <param name="form"> The EncryptingDatabaseForm to close. </param>
private void CloseEncryptingDatabaseForm(EncryptingDatabaseForm form)
{
if (form.InvokeRequired)
{
// Execute delegate.
this.Invoke(new CloseEncryptingDatabaseFormDelegate(CloseEncryptingDatabaseForm), form);
}
else
{
form.Close();
}
}
