You can use this class to compare field values between two documents. I use this in an application where I need to update existing documents with data retrieved from an XML file. From the XML file I create temporary documents and then compare the temporary documents with their equivalent live document. I need to update fields that have changed. The usage example is:
Dim udd As New compareFieldValues Forall fields In doc.Items Set it1 = doc.GetFirstItem(fields.Name) Set it2 = srchdoc.GetFirstItem(fields.Name) If udd.updateField(it1, it2) Then it1.CopyItemToDocument srchdoc, fields.Name End If End Forall Code: Class compareFieldValues Private h1 As String Private h2 As String Sub New End Sub Sub Delete End Sub Public Function updateField(item1 As NotesItem, item2 As NotesItem) As Integer updateField = False If processField(item1.Name) Then 'some fields should not be processed 'get a hashed representation of the field value h1 = hashItem(item1.Values) h2 = hashItem(item2.Values) If h1 <> "" Then 'the new document must have a value in the field, if not ignore it. If Strcompare(h1, h2, 5) <> 0 Then 'if they are different then update them updateField = True End If End If 'h1 <> "" End If End Function Private Function hashItem (tmpStr As Variant) As String Dim tmp As Variant 'produce a hashed representation of the field value tmp = Evaluate(|@Password ("| + tmpStr(0) + |")|) hashItem = tmp(0) End Function Function processField (fieldname As String) As Integer processField = True Select Case fieldname Case "UNID", "Attachments", "Form" : processField = False End Select End Function End Class
Do you have comments on this tip? Let us know.
This tip was submitted to the SearchDomino.com tip exchange by member Bruce Langner. Please let others know how useful it is via the rating scale below. Do you have a useful Notes/Domino tip or code to share? Submit it to our monthly tip contest and you could win a prize and a spot in our Hall of Fame.
This was first published in November 2004