WPF binding TextBox to integer property without throwing exception

Question

I am binding TextBox.Text to int property:

<TextBox Text="{Binding Lines, UpdateSourceTrigger=PropertyChanged}" />

private int _lines = 10;
public int Lines
{
    get { return _lines; }
    set { _lines = value; }
}

everything works as expected with this simple code, there is even validation for the TextBox. There is however exception System.FormatException thrown in the Output log. My question is:
Is there elegant way to get rid of the exception without reimplementing almost everything myself?
By everything I mean validators, convertors, etc. simply ton of code that does not do anything but call Int32.TryParse instead of Int32.Parse . Not that exception thrown and handled by wpf would be a big problem, but full log makes finding actual problems much more difficult.

Answer 1

The question isn't all that clear, but I assume you are referring to an exception that occurs if the user enters invalid text (ie non-numeric, non-integer data).

AFAIK, WPF does not include a built-in control that restricts user input. So your options are:

• Use one of the several third-party implementations of a WPF masked text-box control .
• Host the System.Windows.Forms.MaskedTextBox control in your WPF program, ie using WindowsFormsHost .
• Use custom validation in a regular TextBox control to process the input and avoid having WPF make a failed attempt to parse the invalid text.
• Live with the exception.