C#读取串口数据问题，并且写入数据库，求详细代码

private void button1_Click(object sender, EventArgs e)
{
sp.Close();
sp.PortName = "COM1";

sp.BaudRate = 4800;
sp.Open();

}
private void Form1_Load(object sender, EventArgs e)
{

}

private void button2_Click(object sender, EventArgs e)
{
bool stop = false;
while(!stop)
try
{
string message = sp.ReadLine();
message = message.Substring( 0, 10) //这么写是从串口一条一条的读入，然后截取每一行从头到第10个字节，因为你那个有空格，调试时不对的改下10就好了，串口读入数据百度很多，我就不写了
}