Datagridview not able to retrieve record

Question

I can not retireve record to row in datagridview, using cell_leave event and using the first cell as index to retrieve from database the code is as follows:

private void dgv_CellLeave(object sender, DataGridViewCellEventArgs e)

{

SqlConnection con = new SqlConnection("Data Source=Me; Database=Services;Integrated Security=true");

string str = ("SELECT Code,Category,ItemColor,Price FROM Item WHERE Code='" +col0+ "'");

SqlCommand cmd = new SqlCommand(str, con);

con.Open();

DataTable table = new DataTable();

SqlDataAdapter da = new SqlDataAdapter();

da.SelectCommand = cmd;

da.Fill(table);

dgv.DataSource = table;

}

}

Please can someone help me?

the image