making a web services query using gSoap with query arguments - c++

Question

I'm attempting to convert a soap query written for C# into a gSoap query in Visual C++.
The C# query adds an XML node's to the query call, in order to pass parameters to the query:
XmlNode queryOpts = xmlDoc.CreateNode(XmlNodeType.Element, "QueryOptions", "");
queryOpts.InnerXml = "<DateInUtc>TRUE</DateInUtc>";
Here's the C# query, passing various args (some args are specified as XmlNode objects)
XmlNode nodeListItems = listService.GetListItems("Announcements", null, query, viewFields, null, queryOpts, null);
The C++ / gSoap query allows me to pass a query and response object:
listService.__ns10__GetListItems(&announcementQuery, &announcementResponse)
The query object has various properties that can be set that relate to the arguments in the C# call:
announcementQuery.listName
announcementQuery.query
announcementQuery.queryOptions
announcementQuery.viewFields
The first argument there is a string, no problem.
The query, queryOptions and viewFields are a bit confusing.
"query" is a class of type _ns2__GetListItems_query, and it has the following functions & members:
soap_default()
soap_get()
soap_in()
soap_out()
soap_put()
soap_serialize()
soap_type()
__any
__mixed
for query, queryOptions and viewFields, I'd simply like to specify an xml formatted string, like the C# code does, but I'm not sure how this is done.
Can someone cast some experience on this?
thanks!

Answer 1

I'm assuming you've already discovered the answer to this, but I'll post some notes for posterity.
Here's a simple C++ demo for sending and XML doc to a ASP.NET web method.
int _tmain(int argc, _TCHAR* argv[])
{
Service1SoapProxy proxy;
_WebServiceNS1__HelloWorld helloWorld;
_WebServiceNS1__HelloWorld_xml xml;
_WebServiceNS1__HelloWorldResponse response;
xml.__any = "<doc><x>hi</x></doc>";
helloWorld.xml = &xml;
int result = proxy.HelloWorld(&helloWorld, &response);
fprintf(stdout, "result: %i\n", result);
switch(result)
{
case SOAP_OK:
fprintf(stdout, "Response: %s\n", response.HelloWorldResult);
break;
default:
break;
}
return 0;
}
Here's the trivial web method in the .NET service:
[WebMethod]
public string HelloWorld(XmlNode xml)
{
return string.Format("Your XML: {0}", xml.OuterXml);
}
If everything works, you'll see "Response: hi" on your console.