private void doDirectBroadcast(String directBroadcastRange)
{
try {
DiscoveredPrinter[] printers = NetworkDiscoverer.DirectedBroadcast(directBroadcastRange);
displayPrinters(printers);
} catch (DiscoveryException ex) {
handleException(ex.Message);
}
}
/// <exception cref="ConnectionException"></exception>
/// <exception cref="DiscoveryException"></exception>
private void PerformDiscovery()
{
DiscoveryHandlerImpl discoveryHandler = new DiscoveryHandlerImpl(this);
switch (discoveryMethodsDropdown.SelectedItem)
{
case DiscoveryMethod.DirectedBroadcast:
NetworkDiscoverer.DirectedBroadcast(discoveryHandler, viewModel.IpAddress);
break;
case DiscoveryMethod.FindPrintersNearMe:
NetworkDiscoverer.FindPrinters(discoveryHandler);
break;
case DiscoveryMethod.LocalBroadcast:
NetworkDiscoverer.LocalBroadcast(discoveryHandler);
break;
case DiscoveryMethod.MulticastBroadcast:
NetworkDiscoverer.Multicast(discoveryHandler, int.Parse(viewModel.NumberOfHops));
break;
case DiscoveryMethod.SubnetSearch:
NetworkDiscoverer.SubnetSearch(discoveryHandler, viewModel.SubnetRange);
break;
case DiscoveryMethod.ZebraUsbDrivers:
try {
discoveryHandler = null;
discoverPrintersButton.IsEnabled = false;
viewModel.DiscoveredPrinters.Clear();
foreach (DiscoveredPrinterDriver printer in UsbDiscoverer.GetZebraDriverPrinters())
{
viewModel.DiscoveredPrinters.Add(printer);
}
} finally {
SetDiscoverButtonState(true);
}
break;
case DiscoveryMethod.UsbDirect:
try {
discoveryHandler = null;
discoverPrintersButton.IsEnabled = false;
viewModel.DiscoveredPrinters.Clear();
foreach (DiscoveredUsbPrinter printer in UsbDiscoverer.GetZebraUsbPrinters())
{
viewModel.DiscoveredPrinters.Add(printer);
}
} finally {
SetDiscoverButtonState(true);
}
break;
case DiscoveryMethod.Bluetooth:
BluetoothDiscoverer.FindPrinters(discoveryHandler);
break;
}
}
private async void DiscoverPrintersButton_Clicked(object sender, EventArgs eventArgs)
{
SetInputEnabled(false);
try {
ClearDiscoveredPrinters();
DiscoveryHandlerImplementation discoveryHandler = new DiscoveryHandlerImplementation(this);
await Task.Factory.StartNew(() => {
switch (GetSelectedDiscoveryMethod())
{
case DiscoveryMethod.LocalBroadcast:
NetworkDiscoverer.LocalBroadcast(discoveryHandler);
break;
case DiscoveryMethod.DirectedBroadcast:
NetworkDiscoverer.DirectedBroadcast(discoveryHandler, IpAddressEntry.Text);
break;
case DiscoveryMethod.MulticastBroadcast:
if (string.IsNullOrWhiteSpace(NumberOfHopsEntry.Text))
{
throw new ArgumentException("Number of hops must not be empty");
}
try {
NetworkDiscoverer.Multicast(discoveryHandler, int.Parse(NumberOfHopsEntry.Text));
} catch (FormatException) {
Device.BeginInvokeOnMainThread(async() => {
await DisplayAlert("Format Error", "Number of hops must be an integer", "OK");
});
} finally {
SetInputEnabled(true);
}
break;
case DiscoveryMethod.SubnetSearch:
if (string.IsNullOrWhiteSpace(SubnetRangeEntry.Text))
{
throw new ArgumentException("Subnet range must not be empty");
}
NetworkDiscoverer.SubnetSearch(discoveryHandler, SubnetRangeEntry.Text);
break;
case DiscoveryMethod.ZebraUsbDrivers:
try {
foreach (DiscoveredPrinter printer in DependencyService.Get <IConnectionManager>().GetZebraUsbDriverPrinters())
{
Device.BeginInvokeOnMainThread(() => {
discoveredPrinters.Add(printer);
});
}
} catch (NotImplementedException) {
Device.BeginInvokeOnMainThread(async() => {
await DisplayAlert("Error", "USB driver discovery not supported on this platform", "OK");
});
} finally {
SetInputEnabled(true);
}
break;
case DiscoveryMethod.UsbDirect:
try {
DependencyService.Get <IConnectionManager>().GetZebraUsbDirectPrinters(discoveryHandler);
} catch (NotImplementedException) {
Device.BeginInvokeOnMainThread(async() => {
await DisplayAlert("Error", "USB direct discovery not supported on this platform", "OK");
});
} finally {
SetInputEnabled(true);
}
break;
case DiscoveryMethod.FindPrintersNearMe:
NetworkDiscoverer.FindPrinters(discoveryHandler);
break;
case DiscoveryMethod.FindAllBluetoothDevices:
try {
DependencyService.Get <IConnectionManager>().FindBluetoothPrinters(discoveryHandler);
} catch (NotImplementedException) {
Device.BeginInvokeOnMainThread(async() => {
await DisplayAlert("Error", "Bluetooth discovery not supported on this platform", "OK");
});
} finally {
SetInputEnabled(true);
}
break;
}
});
} catch (Exception e) {
await DisplayAlert("Error", e.Message, "OK");
SetInputEnabled(true);
}
}
