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#1
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Validating Time e.g. 23:17
Hi,
Just wondering whether i could steal some code from someone. I need to validate a cell which should contain a valid time. e.g. 12:28 or 23:32 etc? I've found some regular expression validation on the internet but it doesnt quite work well enough. Cheers |
#2
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Validating Time e.g. 23:17
Once you have the cell formatted as a date, is it not sufficient to
apply Data Validation to the cells using the 'Date' option in the 'Allow' menu? You can specify all types of criteria for the date entered. |
#3
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Validating Time e.g. 23:17
Excel stores time as a fraction of 1 day, 12 hours is .5, 8 hours is .3333.
So any number is valid time to Excel. I assume you mean you want to ensure that they enter formatted time, but what is valid to you? Is 25:12 valid, or does it have to be <= 24 hours? -- HTH RP (remove nothere from the email address if mailing direct) "Help me" wrote in message ... Hi, Just wondering whether i could steal some code from someone. I need to validate a cell which should contain a valid time. e.g. 12:28 or 23:32 etc? I've found some regular expression validation on the internet but it doesnt quite work well enough. Cheers |
#4
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Validating Time e.g. 23:17
Hi Guys, Thanks for your response.
Perhaps i should have been more specific. The problem is that the cells will not specified a Date/Time. it will be set to general (text). So i need to somehow use regular exp to determine whether the value in the cell is of the type hh:mm. cheerx "Bob Phillips" wrote: Excel stores time as a fraction of 1 day, 12 hours is .5, 8 hours is .3333. So any number is valid time to Excel. I assume you mean you want to ensure that they enter formatted time, but what is valid to you? Is 25:12 valid, or does it have to be <= 24 hours? -- HTH RP (remove nothere from the email address if mailing direct) "Help me" wrote in message ... Hi, Just wondering whether i could steal some code from someone. I need to validate a cell which should contain a valid time. e.g. 12:28 or 23:32 etc? I've found some regular expression validation on the internet but it doesnt quite work well enough. Cheers |
#5
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Validating Time e.g. 23:17
Hi,
Try this. It assumes times between 00:00 and 23:59 and the format is hh:mm i.e. contains a colon ":" as delimeter. You could change to a function if/as required. HTH Sub validateTime(TimeStr) Dim hh As Integer, mm As Integer If InStr(1, TimeStr, ":") = 3 And Len(TimeStr) = 5 Then If IsNumeric(Left(TimeStr, InStr(1, TimeStr, ":") - 1)) Then hh = Left(TimeStr, InStr(1, TimeStr, ":") - 1) If IsNumeric(Right(TimeStr, Len(TimeStr) - InStr(1, TimeStr, ":"))) Then mm = Right(TimeStr, Len(TimeStr) - InStr(1, TimeStr, ":")) If hh = 0 And hh <= 23 Then If mm = 0 And mm <= 59 Then Exit Sub End If End If End If End If End If MsgBox "Time " & TimeStr & " is invalid" End Sub "Help me" wrote: Hi Guys, Thanks for your response. Perhaps i should have been more specific. The problem is that the cells will not specified a Date/Time. it will be set to general (text). So i need to somehow use regular exp to determine whether the value in the cell is of the type hh:mm. cheerx "Bob Phillips" wrote: Excel stores time as a fraction of 1 day, 12 hours is .5, 8 hours is .3333. So any number is valid time to Excel. I assume you mean you want to ensure that they enter formatted time, but what is valid to you? Is 25:12 valid, or does it have to be <= 24 hours? -- HTH RP (remove nothere from the email address if mailing direct) "Help me" wrote in message ... Hi, Just wondering whether i could steal some code from someone. I need to validate a cell which should contain a valid time. e.g. 12:28 or 23:32 etc? I've found some regular expression validation on the internet but it doesnt quite work well enough. Cheers |
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