Bluetooth Printer is not working in windows phone 8.1 - windows-phone-7

Question

string command = "Welcome To Solutions.... ";
Byte[] buffer = new byte[command.Length];
StreamSocket socket = null;
buffer = StringToAscii(command);
PeerFinder.AlternateIdentities["Bluetooth:Paired"] = "";
var pairedDevices = await PeerFinder.FindAllPeersAsync();
if (pairedDevices.Count == 0)
{
Debug.WriteLine("No paired devices were found.");
}
else
{
try
{
PeerInformation selectedDevice = pairedDevices[0];
socket = new StreamSocket();
await socket.ConnectAsync(selectedDevice.HostName, "1");
await socket.OutputStream.WriteAsync(WindowsRuntimeBufferExtensions.AsBuffer(buffer));
socket.Dispose();
Array.Clear(buffer, 0, buffer.Length);
}
catch
{
}
}
This Code Working Fine When i Debug the code. But When i Run the code without Debugging Action cannot performed. when i debuig this code it's Working fine. what wrong with me.
![Printind demo][10![]]1

Answer 1

I don't know what printer are you using but you need to specify some commands. For Zebra printers your code looks something like this:
string command = "^XA^LH30,30^F020,10^AD^FDWelcome To Solutions...^FS^XZ";
Byte[] buffer = new byte[command.Length];
StreamSocket socket = null;
buffer = StringToAscii(command);
PeerFinder.AlternateIdentities["Bluetooth:Paired"] = "";
var pairedDevices = await PeerFinder.FindAllPeersAsync();
if (pairedDevices.Count == 0)
{
Debug.WriteLine("No paired devices were found.");
}
else
{
try
{
PeerInformation selectedDevice = pairedDevices[0];
socket = new StreamSocket();
await socket.ConnectAsync(selectedDevice.HostName, "1");
await socket.OutputStream.WriteAsync(WindowsRuntimeBufferExtensions.AsBuffer(buffer));
socket.Dispose();
Array.Clear(buffer, 0, buffer.Length);
}
catch{ }
}
Verify that your Release mode allows code optimization.