I am using word automation services to convert docxs to pdf. This works fine, and I add the metadata (Strings) to the resultant pdf. However, how can I add lookup value fields to the document's list item?

Item["Field"] = LookUpField[1]; (where "Field" is of type Lookup).

LookupField is a collection of type List and stores the value of the list item field from the docx value.

I get this error:

ex = {"Invalid look-up value.\n\nA look-up field contains invalid data. Please check the value and try again."}

What's the best way to do this?


1 Answer 1


Lookup values should be either integers which represent ID of the target element in the lookup list, or strings formatted as id;#title.

For example:

item["FieldName"] = 10;
item["FieldName"] = "10;#Target item title";

Thus I would recommend you to check in debugger, what values do you have in the LookUpField collection.

Also you could try using ParseAndSetValue method, i.e.:

var field = item.Fields.GetFieldByInternalName("FieldName");
field.ParseAndSetValue(item, value);

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