WPF How to create a Custom Textbox with validation and binding

Question

I\'m developing a custom text box for currency editing.
I\'ve seen some ready to use ones, but they\'re complicated and/or not really usable, forcing you to bad practi

Answer 1

take look on this article i think it will help you. http://www.codeproject.com/Articles/15239/Validation-in-Windows-Presentation-Foundation

or you can put this

private static bool IsTextAllowed(string text)
{
    Regex regex = new Regex("[^0-9.-]+"); //regex that matches disallowed text
    return !regex.IsMatch(text);
}

and in PreviewTextInput event put this

e.Handled = !IsTextAllowed(e.Text);