c# - String format for only one decimal place?

Question

I'd like to dispaly only one decimal place. I've tried the following:

string thevalue = "6.33";
thevalue = string.Format("{0:0.#}", thevalue);

result: 6.33. But should be 6.3? Even 0.0 does not work. What am I doing wrong?

Answer 1

You need it to be a floating-point value for that to work.

double thevalue = 6.33;

Here's a demo. Right now, it's just a string, so it'll be inserted as-is. If you need to parse it, use double.Parse or double.TryParse. (Or float, or decimal.)