Combination of numeric and price format - TextBox of WPF

Question

I have using this code for getting price from user

<TextBox Name="txtPrice" PreviewTextInput="NumberValidationTextBox" />

And I am forcing the user to enter only numbers

private void NumberValidationTextBox(object sender, TextCompositionEventArgs e)
{
    Regex regex1 = new Regex("[^0-9]+");
    e.Handled = regex1.IsMatch(e.Text);
}

How could I provide format of price too, like :

123,700

Just set `StringFormat` for `TextBox.Text` if you bind `Text` on some viewmodel value — George Alexandria, Aug 13 '17 at 13:40
@GeorgeAlexandria please write a sample that works with both stringformat 000,000,000 and numeric — alihaghdoust9, Aug 13 '17 at 14:11
`var strFormat = "#,#"; var str = 123456789.ToString(strFormtat, CultureInfo.InvariantCulture);` — George Alexandria, Aug 13 '17 at 14:19

score 0 · Answer 1 · answered Aug 13 '17 at 15:55

0

Testing if a string is correctly formatted as a number with optional thousand-separator:

^\d+(,\d{3})*$

Live demo.

answered Aug 13 '17 at 15:55

linden2015

887
7
9

I try to provide it like Regex regex1 = new Regex("^\d+(,\d{3})*$"); but Visual said, "Bad Compile constant value" – alihaghdoust9 Aug 13 '17 at 17:33
@alihaghdoust9 just try to add `@`: `Regex regex1 = new Regex(@"^\d+(,\d{3})*$");` – George Alexandria Aug 13 '17 at 18:04
hmm, it hasn't bug now, but on this case I can write any character from A to Z – alihaghdoust9 Aug 13 '17 at 18:15
In Java an escape character needs an extra escape. So `\\d` instead of `\d`. This might be the same for c#. – linden2015 Aug 13 '17 at 18:22
@linden2015 Thanks for your help, \\ isn't solve – alihaghdoust9 Aug 13 '17 at 19:12

Combination of numeric and price format - TextBox of WPF

1 Answers1