发送:
Encoding gb = System.Text.Encoding.GetEncoding("gb2312");
byte[] bytes = gb.GetBytes("中文");
serialPort1.Write(bytes, 0, bytes.Length);
接收:
int ilen = serialPort1.BytesToRead;
byte[] bytes = new byte[ilen];
serialPort1.Read(bytes, 0, ilen);
string xx =System.Text.Encoding.Default.GetString(bytes); //xx="中文";