Hi Christian,
When you create a new list item using the UpdateListItems method, the response content should contain the XML node for the updated rows (including the item ID). You should be able parse out the ID out from that response content using a query XML action and/or a Regular Expression action.
This MSDN article should provide more context for what is returned.
Thanks Dan,
if I had put in a little bit more effort I would have found it.
So now I am starting the web service "lists.asmx" with the following code:
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:m="http://schemas.microsoft.com/sharepoint/soap/">
<soap:Header>
</soap:Header>
<soap:Body>
<m:UpdateListItems>
<m:listName>listname</m:listName>
<m:updates>
<Batch RootFolder="/sites/SiteCollectionName/listname/parentfolder/childfolder">
<Method ID="1" Cmd="New">
<Field Name="ID">New</Field>
<Field Name="FSObjType">1</Field>
<Field Name="BaseName">namefornewchildfolder</Field>
</Method>
</Batch>
</m:updates>
</m:UpdateListItems>
</soap:Body>
</soap:Envelope>
Then I am using the Query-XML-action to get the ID with "//z:row/ows_ID".
That will give me the correct ID.
Thanks a lot
The XPath Expression should rather be "//z:row/@ows_ID" as this is the syntax to get the value of the "ows_ID" attribute. Select "inner Text" in xml query action.