Handling out of range exceptions thrown by Numeric Edit

[Nathan Hart]

Hi,

I am using NI Numeric Edit Boxes on a form to restrict user input to numeric values within a certain range.  I have set the "OutOfRangeMode" property for each of the boxes  to "Throw Exception" (as this is more appropriate for my application), but how do I detect / handle this exception programmatically (Visual Basic.Net) without a Try/Catch statement????  At the moment, an "unhandled exception" message is displayed when the input to the edit box is out of range or negative (see below) and I would like to have a custom message box (depending on the edit box in question) and set the value of the edit box to a specific number when an exception is thrown.

Thanks to anyone who can help.

************** Exception Text **************
System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: value
   at NationalInstruments.Restricted.NumericControl.a(Double , Action , Boolean )
   at NationalInstruments.Restricted.NumericControl.SetValue(Double value, Action action)
   at NationalInstruments.UI.WindowsForms.NumericEdit.a(Double , Action )
   at NationalInstruments.UI.WindowsForms.NumericEdit.a(String , Boolean , Action )
   at NationalInstruments.UI.WindowsForms.NumericEdit.OnLeave(EventArgs e)
   at System.Windows.Forms.Control.NotifyLeave()
   at System.Windows.Forms.ContainerControl.UpdateFocusedControl()

[penewman]

why do you want to avoid try/catch ?

[Abhishek Ghuwalewala]

You can detect this condition by adding an event handler for the BeforeChangeValue event of the NumericEdit control. In the event handler:

            if (!numericEdit1.Range.Contains(e.NewValue))
            {
                // Exception will be thrown

                e.Cancel = true;
            }
            else
            {
                // Exception will NOT be thrown
            }

The above example assumes that a NumericEdit instance called numericEdit1 has been declared and initialized.