To do Calculation or Not to do Calculation

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I have a web form that has two textboxes on it. Textbox1 has data that is populated from the database and textbox2 is the new entry for data. When the user enters the web form textbox1 will have a number like 4000 in it. The user enters 3000 in textbox2. Textbox2 also has a Textbox Text change on it to do calculations. What I want to do is to do a calculation if the number is greater than what is in textbox1 and not to do a calculation if it is less than the number in textbox1. Can this be done?

Here is the calculation code:

C#

int o = Convert.ToInt32(TextBoxLYTCNC.Text.Replace(",", ""));
                    int p = Convert.ToInt32(TextBoxTCNC.Text.Replace(",", ""));
                    TextBoxFTE40.Text = Convert.ToString(Math.Round((Math.Abs(p - o) * 100.0 / ((o)))));
                    TextBoxFTE40.Text = Math.Round(Convert.ToDouble(TextBoxFTE40.Text), 2).ToString();

Posted 14-Nov-14 5:31am

Computer Wiz99

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Computer Wiz99 · Accepted Answer · 2014-11-14T05:51:00

I got this solved myself. It was fun to test out to see if I was right or wrong. Or did I have to go into another way of doing it.

C#

protected void TextBox3_TextChanged(object sender, EventArgs e)
        {
            int iTextBox2 = Convert.ToInt32(TextBox2.Text);
            int iTextBox3 = Convert.ToInt32(TextBox3.Text);

            if (iTextBox3 > iTextBox2)
            {

                int a = Convert.ToInt32(TextBox2.Text);
                int b = Convert.ToInt32(TextBox3.Text);
                TextBox4.Text = Convert.ToString(Math.Round((Math.Abs(b - a)) * 100.0 / ((a))));
            }

            else if (iTextBox3 < iTextBox2)
            {
            }