how to remove the characters after the 2 decimal values in C#

Question

I want to remove the characters after 2 decimal values. while I'm formatting not getting any changes in the value. I don't want convert it to double and then string due to performance issue may arise.

data type is Float in the database
value -172.209
Exp op - 172.20

code

  string max_demand = dt_max_demand.Rows[0][0].ToString();
  max_demand= String.Format("{0:0.0#}", max_demand);

sooo why are you converting it to string in the first place, instead of using the mighty number formatting options of string.format? there is absolutly _no_ point in doing so whatsoever. — Franz Gleichmann, Oct 16 '20 at 11:29
Is the data type a numeric type? If so just use the "n2" format — Chris Schaller, Oct 16 '20 at 11:29
Does this answer your question? [Formatting a float to 2 decimal places](https://stackoverflow.com/questions/6356351/formatting-a-float-to-2-decimal-places) — Chrᴉz remembers Monica, Oct 16 '20 at 11:42
that is not working for me @ChrᴉzsupportsMonica dt_max_demand.Rows[0][0].ToString("n2"); — krishna mohan, Oct 16 '20 at 11:49

score 0 · Accepted Answer · answered Oct 16 '20 at 11:52

You could search for the last '.' character in your string and then cut it after 2 more chars but it would be way more efficient and easier to format it using $"{dt_max_demand.Rows[0][0]:F2}", assuming dt_max_demand.Rows[0][0] has a numeric type before you cast it to a string.

  string max_demand = $"{dt_max_demand.Rows[0][0]:F2}";

how to remove the characters after the 2 decimal values in C#

1 Answers1