Question

I have an XML like:

<?xml version="1.0" encoding="utf-16"?>
<ExportProjectDetailsMessage xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Project">
<CPProjectId>7665699f-6772-424c-8b7b-405b9220a8e7</CPProjectId>
</ExportProjectDetailsMessage>

I’m trying to get the CPProjectId as a Uniqueidentifier using:

DECLARE @myDoc xml
DECLARE @ProdID varchar(max)

SET @myDoc = '<ExportProjectDetailsMessage xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Project"><CPProjectId>7665699f-6772-424c-8b7b-405b9220a8e7</CPProjectId></ExportProjectDetailsMessage>'

SET @ProdID =  @myDoc.value('(ExportProjectDetailsMessage/CPProjectId)[1]', 'varchar(max)' )
SELECT @ProdID

All i can receive is NULL =/
I’ve tried many combinations on @myDoc.value but no results =/

How can i retrieve the value from my XML ?

Thanks!

–EDIT:
Something that i noted, when i remove the namespace declaration from the XML it works fine!
The problem is that i need this namespaces! =/

Answer 1

You’re right the namespace is the issue. You’re query is looking for a node ExportProjectDetailsMessage but such a node doesn’t exist in your document, because there is a namespace declared as a default in your document. Since you can’t remove that (nor should you) you should include it in your XPATH query like so:

set @ProdId = @myDoc.value('
    declare namespace PD="http://schemas.datacontract.org/2004/07/Project";           
(PD:ExportProjectDetailsMessage/PD:CPProjectId)[1]', 'varchar(max)' )

You may also want to consider not using varchar(max) but perhaps uniqueidentifier