void btnScan_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
if (_txtStartPort.Text == string.Empty || _txtStopPort.Text == string.Empty)
{
MessageBox.Show("Please enter a start port and a stop port");
}
else
{
if (btn.Text == "Scan")
{
_worker = new BackgroundWorker();
_worker.WorkerReportsProgress = true;
_worker.WorkerSupportsCancellation = true;
_worker.DoWork += new DoWorkEventHandler(_worker_DoWork);
_worker.ProgressChanged += new ProgressChangedEventHandler(_worker_ProgressChanged);
_worker.RunWorkerCompleted += _worker_RunWorkerCompleted;
_worker.RunWorkerAsync();
_txtScanOutput.Text = "";
_txtScanOutput.AppendText("Starting port scan..." + Environment.NewLine);
_txtScanOutput.AppendText("Port scanning host: " + _txtHost.Text + Environment.NewLine);
_txtScanOutput.AppendText(Environment.NewLine);
btn.Text = "Stop";
}
else
{
_worker.CancelAsync();
btn.Text = "Scan";
}
}
}
/// <summary>
/// Appends text to the current text of a rich text box.
/// </summary>
/// <param name="text">The text to append to the current contents of the text box.</param>
public void AppendText(string text)
{
_textBox.AppendText(text);
}