C# Winforms Math Issue

Question

I have a little math issue I have stumbling around on. Hoping someone can help with it.

label3.text needs to be textbox1.text * 100 and that product needs to be divided by the quotient of (1000000/textbox7.text)

`label3.Text = (Convert.ToDouble(textBox1.Text) * 100 / (1000000 / (textBox7.Text).ToString("N3"));`

Dont forget to make your "100" "100.0d" to prevent the compiler rounding the value. The same applies to the million integer value. — Chris Watts, Dec 31 '16 at 20:44
"C# winforms math issue" isn't really a helpful title. Please read [ask] and modify it — Camilo Terevinto, Dec 31 '16 at 21:27
Possible duplicate of [Reading an integer from user input](http://stackoverflow.com/questions/24443827/reading-an-integer-from-user-input) — Eugene Podskal, Jan 01 '17 at 15:54

Dmitry Bychenko · Accepted Answer · 2016-12-31T20:50:01.777

4

You can't divide by textBox7.Text (which is string) but by double:

label3.Text = (Convert.ToDouble(textBox1.Text) * 100 / 
              (1000000 / Convert.ToDouble(textBox7.Text))).ToString("N3");

Please, notice that .ToString("N3") should be the very last method (= the value we've obtain represent in N3 format)

edited Dec 31 '16 at 20:50

answered Dec 31 '16 at 20:42

Dmitry Bychenko

1 Answers1