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I have a strange problem with my calculated column.

I want to build a link utilizing the ID of the entry. So I have a formula like this:

="<a href='someurl.html?id="&[ID]&"'>some text</a>"

To have this interpreted as HTML, I changed the type to "Date and time", which is some kind of a hack, but works.

The problem is that on some time, which I wasn't able to reproduce exactly, the formula breaks. From this time the brackets [ and ] are gone, and the link will only contain "ID" instead of the current items ID.

Any ideas? Thanks!

EDIT: I tested a little more. It seems that all existing links continue to work, but all links on new entries won't.

  • Are you using SharePoint Online or on-premise? – moe Jun 26 '17 at 7:58
  • But even if the bracket goes, the link still works for me – SharePointMan Jun 26 '17 at 8:05
  • 2013 on premise. Yes, the brackets are away when the field is edited again. but as long as I don't save it will work. The problem is that it will stop working at some time in future. – avh Jun 26 '17 at 8:41
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The built in ID column is an unreliable and unsupported column to use in a calculated column, which is why it doesn't appear in the list. If you are trying to build a field based on that column, it is best to do it via workflow. I had documented that long back in the 2007 days.

  • I did that, and it works. I just wasn't sure if there is another solution. Thanks. – avh Jun 26 '17 at 12:42
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Perhaps you have to use the concatenate function, so SharePoint understands the string you want to return.

=CONCATENATE("<a href='someurl.html?id=";[ID];"'>some text</a>")
  • I tried that, but this makes no difference. Please note that your "," must be ";" or the formula won't be accepted! – avh Jun 26 '17 at 8:59
  • Depends on the language of SharePoint ;-), but yes lets keep it to en-US – bonm014 Jun 26 '17 at 10:51

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