Using serialport and backgroundworker

[memorex]

I need to make a project that takes data from a uC through serial port and insert it in some databases. I want to take the data from 5 sensors, i'm sending the data from al 5 sensors once per hour. The problem is that I want to use backgroundworker for taking the data from serial port, and insert in the database and another backgroundworker for the graphic interface of the program(the graphic interface contain a DataGridView that loads from the database last 200 entries and 5 richtextboxes for instant values of the sensors).
Now I have this code:

In constructor:

ComPort.DataReceived += new SerialDataReceivedEventHandler(port_PrimireDate);

Method, for datareceived event:

private void port_PrimireDate(object sender, SerialDataReceivedEventArgs e)
        {
            string data;
            data = ComPort.ReadExisting();

        }

For now I want to make backgroundworker for taking data from port, I tried some versions but I have a lot of errors. If someone can give me an idea it will be great.