New to C#.Net and need help on Number Conversion please

Question

I have 3 TextBox.

I input 123.45 into the TextBox1, input 123.22 into the TextBox2, then do a calculation (123.45 + 123.22)/2 = 123.335.

I want to display the result 123.34 instead of 123.335 in the TextBox3.

How to do that?

Appreciate for your help!

f117_b2 · Answer

Thank both Solitaire and hasan maqbool very much. To Solitaire : Your stuff solves my problems. To hasan maqbool : I am running .Net Framework v1.1. So I think the thing MidpointRounding .AwayFromZero works only with v2.0, which I don't have it yet.

hasan maqbool · Answer

decimal ans = 0; try { ans = Convert .ToDecimal(textBox2.Text) + Convert .ToDecimal(textBox3.Text); ans = ans / 2; this .textBox1.Text = Convert .ToString( Math .Round(ans, 2, MidpointRounding .AwayFromZero)); } catch (System. FormatException ) { MessageBox .Show( "Format is not consistent" ); } Try it.

Solitaire · Answer

The function is using a form of banker's rounding. Instead of rounding up from .205 to .21, it is rounding to the nearest EVEN digit. For example, if the number ends with either .215 or .225, it returns .22 for both of them. You can fix this problem by adding .005 to the number before rounding: dval = Math.Round(dval + 0.005, 2) Now .205 will round to .21

f117_b2 · Answer

Bad news Krishnaraj L In most cases, it works fine. Try this two numbers out, (10982.63 + 8453.78)/2 = 9718.205. Math.Round (dVal, 2) returns 9718. 2 , not 9718. 21. Any ideas?????

Krishnaraj L · Answer

Great!!!

f117_b2 · Answer

Thank you very much Krishnaraj L . It works like charm.

Krishnaraj L · Answer

Hi there, Try this code it should work. decimal dVal = Convert.ToDecimal (textBox1.Text) + Convert.ToDecimal (textBox2.Text); dVal = dVal / 2; textBox3.Text = Convert.ToString ( Math.Round (dVal, 2) );

New to C#.Net and need help on Number Conversion please

Answers (7)