Calculated List column with Now() function

Question

I am designing a Sharepoint list for recording entry and exit times. I have one column which has been set as time function with a calculation of =Now() a second column called [Out] with a Yes/No choice and a 3rd calculated column [Time Out] with a
formula =IF(Out="Yes",NOW(),"On Site"). This works fine until you add data into other columns then the [Time Out] column keeps on changing time. How can I make the[TimeOut] column only show the time when the [Out] column changes to yes
and keep that time.

Answer 1

Hi
another approach
if first column represent the time when the item is creted, you don't need it. You could use [Created] column value
Next, set [Out] columnn with default value NO, and next you can use 2 scenarios
First one  -  you don't use the calculated column, you create a new one  [TimeOut], text column. with default value="On Site"
You should also attacha  workflow to your list, which will start when an item is changed ( only in this case ! ) wnd which will analyse if [Out]=yes - in this case will fill [TimeOut] with string value for now() value
Second one. you keep the calculated column, but the formula should contain converting datetime in string value
More details about this formula for converting time in text
http://msdn.microsoft.com/en-us/library/office/bb862071%28v=office.14%29.aspx
Romeo Donca, Orange Romania (MCSE, MCITP, CCNA) Please Mark As Answer if my post solves your problem or Vote As Helpful if the post has been helpful for you.