protected void Button2_Click(object sender, EventArgs e)
    {
        Webservice.WebService1 web = new Webservice.WebService1();
        double res = web.sub(Convert.ToDouble(TextBox1.Text), Convert.ToDouble(TextBox2.Text));
        TextBox3.Text = Convert.ToString(res);

        string connectionStringTestDb = ConfigurationManager.ConnectionStrings["dbString"].ConnectionString;
        //string dbString = "Data Source= .\SQLEXPRESS;AttachDbFilename=|DataDirectory|ArithmeticDatabase.mdf; Integrated Security=True;User Instance=True";
        SqlConnection myConnection = new SqlConnection(connectionStringTestDb);

        try
        {
            myConnection.Open();
            Console.WriteLine("successfully connected database");
            string arithOper = "subtract";
            string myquery;
            myquery = "insert into Arithmetic values('" + TextBox1.Text + "' , '" + TextBox2.Text + "','" + TextBox3.Text + "','" + arithOper + "')";
            SqlCommand updatecom = new SqlCommand(myquery, myConnection);
            updatecom.ExecuteNonQuery();
            myConnection.Close();

        }
        catch (SqlException ex)
        {
            Console.WriteLine("You failed!" + ex.Message);
        }
    }
 protected void Button2_Click(object sender, EventArgs e)
 {
     Webservice.WebService1 web = new Webservice.WebService1();
     double res = web.sub(Convert.ToDouble(TextBox1.Text), Convert.ToDouble(TextBox2.Text));
     TextBox3.Text = Convert.ToString(res);
 }