private void ensureButton3_Click(object sender, System.EventArgs e)
        {
            float price, time, reliability, availability;
            price = float.Parse(expense.Text);
            time = float.Parse(eTime.Text);
            reliability = float.Parse(rValue.Text);
            availability = float.Parse(aValue.Text);
            try
            {
                string myConnectString = "Persist Security Info=False;Integrated Security=SSPI;database=zhwPaper;server=CLC-31071999FBB\\CLC;Connect Timeout=30";
                SqlConnection myConn = new SqlConnection(myConnectString);
                myConn.Open();
                SqlCommand cmd =myConn.CreateCommand(); 
                cmd.CommandText = "INSERT INTO wector_value(price, time, reliability, availability) VALUE('"+price+"', '"+time+"', '"+reliability+"', '"+availability+"')";
                cmd.ExecuteNonQuery();
            }
            catch(Exception c)
            {
                Console.WriteLine("写入数据库错误：/n{0}", c.Message);
            }
        }