Having trouble refreshing the display of a NumericUpDown control

Question

Hi All I'm having a problem with a NumericUpDown control. If the user highlights the number and hits the backspace key the number is of course erased. If the user then goes to another control in the dialog box the number is still not displayed in the NumericUpDown. The value is still there - if the user hits the up or down arrows the number is incremented or decremented and is displayed correctly. I tried to fix this by declaring a Leave event handler that does something to redraw or otherwise update the NumericUpDown display whenever it looses focus. I first tried using the Refresh() method but that did nothing. I then tried calling Hide() followed immediately by Show() and that also did't fix the problem. Anyone know what I could do to make this work right? Thanks!

Scherzo · Answer

Hi I got the same problem too and the solution I've applied is copying .Value into .Text on the LostFocus() event: Private Sub MyNumericUpDown_LostFocus(ByVal sender As Object ByVal e As System.EventArgs) Handles MyNumericUpDown.LostFocus MyNumericUpDown.Text = MyNumericUpDown.Value End Sub So when the control lost his focus we always ensure that the .Text have the same value as .Value . Scherzo

Karl Hiramoto · Answer

I worked around this by using NumericUpDown . Text = 0 then .Value= 123 To display 123. http://msdn.microsoft.com/en-us/library/cs40s7ds(VS.85).aspx Looks like some kind of bug.

Tim Reiter · Answer

(yes replying to my own post...) OK I found that calling UpButton() and then DownButton() seems to work. Does anyone know of a more elegant less cludgy solution? Thanks again!