Regex real number

Question

I need real numbers in TextBox. I try my code online here

"^-{0,1}[0-9]{1,3},{0,1}[0-9]{1,2}$"

and its working perfectly, but in my project not working. Please show me how I must do it

Please show your code, we don't know why it isn't working without seeing the code. — Mixxiphoid, Nov 16 '17 at 09:40
you can try the [Gu.Wpf.NumericInput](https://github.com/JohanLarsson/Gu.Wpf.NumericInput) — FoggyFinder, Nov 16 '17 at 09:41
private void c_PreviewTextInput(object sender, TextCompositionEventArgs e) { Regex regex = new Regex ("^-{0,1}[0-9]{1,3},{0,1}[0-9]{1,2}$"); e.Handled = regex.IsMatch(e.Text); } — Qwert11, Nov 16 '17 at 09:48
https://stackoverflow.com/questions/1268552/how-do-i-get-a-textbox-to-only-accept-numeric-input-in-wpf — ASh, Nov 16 '17 at 09:55

score 0 · Answer 1 · answered Nov 16 '17 at 09:50

Would TryParse works for you? From MSDN:

Converts the string representation of a number in a specified style and culture-specific format to its double-precision floating-point number equivalent. A return value indicates whether the conversion succeeded or failed.

And for you, it could be something like this:

private void c_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
    double num;
    e.Handled = double.TryParse(e.Text, out num);
    // if e.Text is a number, e.Handled will be true and num = e.Text
}

Regex real number

1 Answers1