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?

Albin Sunnanbo · Accepted Answer · 2010-11-08 13:46:10Z

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...

answered Nov 8, 2010 at 13:46

Albin Sunnanbo

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il_guru · Accepted Answer · 2010-11-08 13:39:33Z

0

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.

answered Nov 8, 2010 at 13:39

il_guru

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2 Comments

Qcom Over a year ago

Yes, but I also need to account for the fact that I can calculate negative values, just not zero.

il_guru Over a year ago

mm in that case i think the only solution will be to handle the 0 when the NumericUpDown value change or in your function

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