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data = System.Text.Encoding.Default.GetBytes("27 105");
Int32 port = 9100;
string bigFont =((char)27).ToString() + ((char)33).ToString() + ((char)213).ToString();//放大字体
TcpClient client = new TcpClient();
try
{
client.Connect("172.30.168.100", port);
Byte[] data = System.Text.Encoding.Default.GetBytes(bigFont);
NetworkStream stream = client.GetStream();
stream.Write(data, 0, data.Length);
data = System.Text.Encoding.Default.GetBytes(bigFont);
stream.Write(data, 0, data.Length);
data = System.Text.Encoding.Default.GetBytes("打印机测试\n");
stream.Write(data, 0, data.Length);
data = System.Text.Encoding.Default.GetBytes("- -\n");
stream.Write(data, 0, data.Length);
data = System.Text.Encoding.Default.GetBytes("- -\n");
stream.Write(data, 0, data.Length);
stream.Close();
}