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Re: Empty values to the "EditInt" widget and the "int" basic type [message #52591 is a reply to message #52589]

Fri, 25 October 2019 08:35

koldo
Messages: 3361
Registered: August 2008

Senior Veteran

Dear Frank

It is simple. U++ uses a special value for all usual types, U++ classes and some most used C++, that is Null.

If you have an EditInt and you want to know if it is empty or not, just do:

if (IsNull(myEdit))
	Exclamation("Please enter a number");

IsNull() function is the way to test if a variable is Null.
If you look in U++ sources and examples, you will find tons of IsNull() Smile

Best regards
Iñaki

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[Message index]

		[SOLVED] Empty values to the "EditInt" widget and the "int" basic type By: xrysf03 on Thu, 24 October 2019 22:30
		Re: Empty values to the "EditInt" widget and the "int" basic type By: koldo on Fri, 25 October 2019 08:35
		Re: Empty values to the "EditInt" widget and the "int" basic type By: xrysf03 on Fri, 25 October 2019 10:58
		Re: Empty values to the "EditInt" widget and the "int" basic type By: koldo on Fri, 25 October 2019 12:26

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