C# WindowsForms NumericUpDown “cannot equal x value” property?

Question

Due to my application being a quadratic root solver, and receiving input from a NumericUpDown in the form of 0 will throw a divide by zero error, I was wondering if it was possible to be able to specify that particular NumericUpDown control, not able to be set to 0 at all. Or, is it just easier to catch that with a conditional and resolve it?

Answer 1

You can create a check in the Validating-event

private void numericUpDown1_Validating(object sender, CancelEventArgs e)
{
    if ((sender as NumericUpDown).Value == 0)
    {
        e.Cancel = true;
    }
}

But you also need the check in your code, always validate input...

Answer 2

NumericUpDown has two properties calld Minimum and Maximum which set the min and max value for your up/down control. You can just set its Minimum to 1 so the user won't be able to select 0.