LiveCode Forums.

Hi,

I have a field, say txtDate, where I would like to validate whether the user has entered a valid date or not: When I put a any number into the field then, say 1 or 123 or whatever, the validation results in "true" although it is not a valid date value. What am I doing wrong?

The "is a date" check is only checking if rev would convert the value to a date. Because of "the seconds", any integer is a date for rev. Every country enters date differently. So to make rev only accept valid dates, I suggest to check for formatting that are according to your local date requirements.

for example:
put field 1 into theDate set the itemDe ... ans end if

If you want to be sure I suggest to use a calendar entry widget that pops up, one like most websites use.

Obviously I have misunderstood the "is a date" check. Thank you very much for your example. I think I will go with it. Although, using a calendar entry widget would maybe be the better alternative. Would it be possible for you to post a link of such a control because my search within revOnline Samples was not successful?

Thank you very much BvG

Jörg

That rev can resolve an integer into a date can be both useful and annoying, as you have seen.

You can always say:

if fld "txtdate" is a date and fld "txtDate" is not an integer then...

Craig Newman

Jörg,
Sarah Reichelt has posted on her website a calender stack. This stack has a substack that lets you choose a date.
http://www.troz.net/rev/index.irev?cate ... ity#stacks
Sarah knows all about dates and time in Rev. She is THE expert.
You have to test it, I did not include it in any of my projects yet, but she explains how to do it.
regards
Bernd

me too

http://www.bjoernke.com/?target=stacks

about in the middle, date & time

BvG wrote:me too

http://www.bjoernke.com/?target=stacks

about in the middle, date & time

Damned ! I spent long time to modify Sarah's stack in order to make it as a group, not a popup window, for a revlet.


But your stack is perfect. I wish I had known it before.

yeah... there should be a central repository where everyone uploads their stacks and hints and such... and then everybody would use it because it'd be rad and such... yeah that'd be nice...

Hi. Altuit has a very nice date picker here:

http://www.altuit.com/webs/altuit2/RunRev/Downloads.htm

Look for altAnswerDate at the bottom of the page. It's very easy to insert and much more aesthetically neutral than the other ones I've seen.

Thanks to all! I think I will spend a bit of time to try the stacks. BvG, I think you are absolutely right with your suggestion that there should be a central repository. It would help definitely everybody! Craig, your "date-check", the combination of ... is a date ... and ... is not an integer ... is also a good approach but in my case a check of e.g. "14.123456" would result in "true" although this is not a date value is valid. But I think with additional checks (e.g. type of items and length) it would also work.

regards

Jörg

@BvG,
you could post it to RevOnline, that could be a central repository. If only people would use it as such.
regards
Bernd

yes that's what i meant, rev online is there, but it has some backdraws. And the biggest is that people are not using it

Schnipp

Joerg wrote:... is not an integer ... is also a good approach but in my case a check of e.g. "14.123456" would result in "true" although this is not a date value is valid. But I think with additional checks (e.g. type of items and length) it would also work.

regards

Jörg

Schnapp

There also is the expression "is a number" which could be more useful in your case. Also for german dates you could set the itemdel to "." and check the number of items (which would need to be 3 and all of them would need to be numbers)

Cheers,

Malte

I like date picker stacks and have seen some good ones, but on Windows, Rev *still* cannot validate a date pre-1970.

http://quality.runrev.com/qacenter/show_bug.cgi?id=4941

Hi folks,

on Windows you can use a tiny VBS Script as a workaround:
...
put "result = IsDate(" & QUOTE & the_date_in_question & QUOTE & ")" into tvb
do tvb as vbscript
put the result into is_a_date
## true or false
...

Tested with these (german! DD/MM/YYY) variations of a date:
01/01/1969
31/01/1969
31-01-1969
31.01.1969
31.01.69
01/01/69
31/01/69 ## Obvioulsy also works with english dates!
31-01-69
01/31/1969
31.1.69

Best

Klaus