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Previous Value of Numeric Edit Field

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John Smith
John Smith on 16 Feb 2020
Commented: John Smith on 17 Feb 2020
Hi all,
Is there a quick way to reference the previous value of an App Deigner numeric edit field? This is in order to reset the value after an error dialog has been shown. Something like
app.NumericEditField.Value = app.NumericEditField.PreviousValue
would be ideal.
Many thanks.


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Accepted Answer

Joseph Cheng
Joseph Cheng on 16 Feb 2020
I think thats almost what you'd want do have and store prevvalue during during successful calculation. Previousely in GUIDE and UIcontrol type construction there was a userdata field. I haven't been using appdesigner but it looks to be gone from a cursory inspection. However you can set a private/public property as a place to store the previous value upon successful computation run.
app.NumericEditField_N_PreviousValue= app.NumericEditField.Value
app.NumericEditField.PreviousValue= app.NumericEditField_N_PreviousValue
during an error catch.

  1 Comment

John Smith
John Smith on 17 Feb 2020
Thanks, like you suggested, I stored the previous value in an app property.

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More Answers (1)

Ajay Kumar
Ajay Kumar on 16 Feb 2020
Try to save the Previous value in a temporary variable. For eg:
temp = app.NumericEditField.Value;
if error
app.NumericEditField.Value = temp;
app.NumericEditField.Value = newvalue;


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