Click here to Skip to main content
15,069,020 members
Please Sign up or sign in to vote.
0.00/5 (No votes)
See more:
I want to calculate percentage, and I have done it but unable to get value in which format I want.
suppose I am calculating following
(579803.4 * 14%)=81,172.476
but I want to 81,172.48 after calculation. what should I do?


Thanks In advance

What I have tried:

textBox1.Text = (((float.Parse(textBox2.Text)) * (float.Parse(textBox3.Text)) / 100)).ToString();
Posted
Updated 29-Jun-21 7:52am
Comments
Richard Deeming 28-Apr-16 10:08am
   
What if the user enters something that's not a valid number? Your code will fail with an exception. You should use the TryParse[^] method instead; that way, you can display a suitable error message if one of the values isn't a number.

Try
C#
textBox1.Text = (((float.Parse(textBox2.Text)) * (float.Parse(textBox3.Text)) / 100)).ToString("F2");
   
First off, don't use Parse on user input: use TryParse instead:
C#
double d1, d2;
if (!double.TryParse(textBox2.Text, out d1))
    {
    MessageBox.Show(string.Format("{0} is not a number", textBox2.Text));
    return;
    }
if (!double.TryParse(textBox3.Text, out d2))
    {
    MessageBox.Show(string.Format("{0} is not a number", textBox3.Text));
    return;
    }
textBox1.Text = (d1 * d2 / 100).ToString("#.00");
That way, your app won't crash if your user misskeys...
   
Use

ToString("0.00"); //2dp Number

Or

Math.Round(yourAmount,2)

for 2 decimal.
   
v2

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)




CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900