来自Xamarin Android的WiFi打印无法正常工作

Question

我尝试使用以下代码通过WiFi打印到HP打印机，来自Xamarin Android代码：

   private async Task Print()
    {
        await Task.Run(() =>
        {
            try
            {
                //As you will see, all depends on your printer commands
                Socket socket = new Socket("10.10.0.15", 9100);
                PrintWriter pw = new PrintWriter(socket.OutputStream, false);

                //here is the beginning of printing
                pw.Write(0x1B); //Example of command to start a printer
                pw.Print("THIS IS YOUR AWESOME TEXT FOR PRINT");

                pw.Write(0x0C); //here you release the paper
                pw.Write(0x40); //finish printing
                pw.Flush();
                pw.Close();
                pw.Dispose();
                socket.Close();
                socket.Dispose();

            }
            catch (SocketException ex)
            {
                System.Console.WriteLine("SocketError: " + ex.Message);
            }
        });
    }

但这不起作用。我的Android设备和这台打印机在同一个WiFi网络上。请在这里建议可能出现的问题？