I want to check to see if a field exists in my program, but If I use :

if (item[_strContainingFieldName] != null)
    item[_strContainingFieldName] = fieldValue;

I receive an error stating

The property or field has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested.

So I wanted to use List.Fields.ContainsField or properties.ListItem.Fields.ContainsField but forgot I can only use these in the server API.

Is there something similar which I can make use of right now? The tool will be a "throw away" application since we're making updates behind the scenes, so I'm not too worried about catching every possibility and logging everything.

Note: The language is C#

  • What language are you writing the script in?
    – Brandon C.
    Jun 5, 2014 at 14:44
  • C#. I tried to put it as a tag and it wouldn't accept it. Sorry!
    – Dinerdo
    Jun 5, 2014 at 15:14

1 Answer 1


From the error i think you are using CSOM. If yes, then you have to load the properties before using it.


To check if field exists use following:

  • I did this, so my updates to fields which exist are fine. But when I enter a field that doesn't exist, I want it to be skipped (so I users enter a field that is nonexistent, it should be skipped).
    – Dinerdo
    Jun 5, 2014 at 15:15
  • 1
    you can check as if(item.FieldValues.ContainsKey("salesdate"))
    – Aanchal
    Jun 5, 2014 at 15:20
  • Thanks! Can you add this comment to your answer? I will mark it accordingly.
    – Dinerdo
    Jun 5, 2014 at 16:07
  • updated the answer.
    – Aanchal
    Jun 6, 2014 at 5:15

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