private void btnSave_Click(object sender, EventArgs e)
{
AdapterInfo adapter = cbAdapters.SelectedItem as AdapterInfo;
if (adapter != null)
{
uint result;
try
{
if (cbAutomatic.Checked)
{
result = adapter.SetDNSAutomatic();
}
else
{
string primaryDNS = txtPreferredDNS.Text.Trim();
string secondaryDNS = txtAlternateDNS.Text.Trim();
if (Helpers.IsValidIPAddress(primaryDNS) && Helpers.IsValidIPAddress(secondaryDNS))
{
result = adapter.SetDNS(primaryDNS, secondaryDNS);
}
else
{
throw new Exception("Not valid IP address.");
}
}
if (result == 0)
{
NativeMethods.DnsFlushResolverCache();
MessageBox.Show("DNS successfully set.", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else if (result == 1)
{
MessageBox.Show("DNS successfully set. Reboot is required.", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else if (result > 1)
{
MessageBox.Show("Setting DNS failed with error code: " + result, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
catch (Exception ex)
{
MessageBox.Show("Setting DNS failed.\r\n" + ex.ToString(), Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
private void cbAdapters_SelectedIndexChanged(object sender, EventArgs e)
{
AdapterInfo adapter = cbAdapters.SelectedItem as AdapterInfo;
if (adapter != null)
{
string[] dns = adapter.GetDNS();
if (dns != null && dns.Length == 2)
{
cbAutomatic.Checked = false;
txtPreferredDNS.Text = dns[0];
txtAlternateDNS.Text = dns[1];
}
else
{
cbAutomatic.Checked = true;
}
cbDNSType.SelectedIndex = 0;
}
UpdateControls();
}
public DNSChangerForm()
{
InitializeComponent();
Icon = ShareXResources.Icon;
AddDNS("Manual");
AddDNS("Google Public DNS", "8.8.8.8", "8.8.4.4"); // https://developers.google.com/speed/public-dns/
AddDNS("OpenDNS", "208.67.222.222", "208.67.220.220"); // http://www.opendns.com/
AddDNS("Level 3 Communications", "4.2.2.1", "4.2.2.2"); // http://www.level3.com/
AddDNS("Norton ConnectSafe", "199.85.126.10", "199.85.127.10"); // https://dns.norton.com/
AddDNS("Comodo Secure DNS", "8.26.56.26", "8.20.247.20"); // http://www.comodo.com/secure-dns/
AddDNS("DNS Advantage", "156.154.70.1", "156.154.71.1"); // http://www.neustar.biz/services/dns-services/free-recursive-dns
AddDNS("Yandex DNS", "77.88.8.2", "77.88.8.88"); // http://dns.yandex.com/
foreach (AdapterInfo adapter in AdapterInfo.GetEnabledAdapters())
{
cbAdapters.Items.Add(adapter);
}
if (cbAdapters.Items.Count > 0)
{
cbAdapters.SelectedIndex = 0;
}
}
