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Informationen zum Thema:
WinDev Forum
Beiträge im Thema:
Erster Beitrag:
vor 5 Jahren, 3 Monaten
Letzter Beitrag:
vor 5 Jahren, 3 Monaten
Beteiligte Autoren:
Christo, Arie, Michael Drechsel

WD17: Web Service sending Null Value

Startbeitrag von Christo am 21.05.2013 16:46

Hi All,

I am attempting to send a null value to a imported web service.

My understanding is that the soap string for correct null handling should be ,
I use the SOAPAddAttribute(ns1:OrderStatus , "xsi:nil", "true" ) , but then the field is missing from the soap string.

if I set the field to 0 then it appears but contains the 0 , so not null 0

it looks like windev does not include the field unless you set to a value. I have tried using the ..null = true but this is not allowed

does anybody know how to successfulle handle sending null values to a web service ?

any assistence or pointers would be greatly apreciated



Hi Christo,

I use an extra variable like

Price is numeric=20
Price_is_NULL is boolean=False

and make at the server / client site:

If Price_is_NULL=true then

... or something else ...

von Michael Drechsel - am 21.05.2013 17:52
Hi Michael,

Thank you for your thoughts.

unfortunately it is external web service that I am sending data to, which I did not code. But they insist that they need a Null if there is no value available.


von Christo - am 21.05.2013 18:38
maybe you can use SoapPrepare to get the entire soap message (as a string/buffer), tweak it a bit and finally send it using SoapRunXML()

von Arie - am 21.05.2013 19:27
Thanks Arie,

I was hoping to do it 10 time faster :)

I will give your suggestion a go.


von Christo - am 21.05.2013 21:06
Hi Arie,

SoapPrepare and SoapRunXML does work on my Windows PC as a test environment. These SOAP function are however not available for Linux as a native executable or under Java.

Any other ideas?


von Christo - am 22.05.2013 13:33
I'm afraid I don't do Linux.
Do you really need it as a Linux application?

von Arie - am 22.05.2013 13:56

At the moment yes, But let me see , maybe we can put a small Windows computer in the mix, lots of old Windows XP machines standing around here.


von Christo - am 22.05.2013 14:32
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