System.InvalidOperationException: The type myobject[] may not be used in this context.

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Jeremy - 30 Apr 2004 01:57 GMT

I am trying to return a custom object from a web service, and get this very
cryptic message.

System.InvalidOperationException: There was an error generating the
XML document. --->
System.InvalidOperationException: The type myobject[] may not
be used in this context.

What does it mean?

The object I am returning has a couple of fields, plus an array containing
objects. The error message indicates a problem with creating xml for an
object in the array of objects.

Either no one else has problems with this, or no one else is doing this.
Maybe there is a better way. I'm open to suggestions.

Jeremy

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Trebek - 30 Apr 2004 14:38 GMT

Take a look at the XmlIncludeAttribute class (or SoapInclude if SoapRpc --
depending on your needs).

Should fix you up ....

Alex

> I am trying to return a custom object from a web service, and get this very
> cryptic message.
[quoted text clipped - 14 lines]
>
> Jeremy

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Jeremy - 30 Apr 2004 17:29 GMT

Alex, thanks. Can you help me out with the syntax? Based on the c# example
in help, I deduce the following VB, but it gives a syntax error telling me I
need more continuation characters. The squigglies show up under the "<" in
"<xmlinclude(...".
<WebMethod()> _

<xmlinclude(typeof(myMainObject)), xmlinclude(typeof(myEmbeddedObject))> _

Public Function getData(ByVal key1 As String, ByVal key2 As String) As
myMainObject

getData = some stuff.

end function

Jeremy

> Take a look at the XmlIncludeAttribute class (or SoapInclude if SoapRpc --
> depending on your needs).
[quoted text clipped - 23 lines]
> >
> > Jeremy

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Trebek - 30 Apr 2004 17:52 GMT

Sorry Jeremy .. never messed with vb or vb.net ... always been a C-based
programmer :( but I though it *should* look something like the following
based on MSDN:

<XmlElement(Type:=GetType(your_first_possible_class)),
XmlElement(Type:=GetType(your_next_possible_class))>

HTH,

Alex

> Alex, thanks. Can you help me out with the syntax? Based on the c# example
> in help, I deduce the following VB, but it gives a syntax error telling me I
[quoted text clipped - 42 lines]
> > >
> > > Jeremy

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Trebek - 30 Apr 2004 17:55 GMT

Opps ... replace with the appropriate attribute :)

Alex

> Sorry Jeremy .. never messed with vb or vb.net ... always been a C-based
> programmer :( but I though it *should* look something like the following
[quoted text clipped - 60 lines]
> > > >
> > > > Jeremy

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Jeremy - 30 Apr 2004 18:32 GMT

Easy for you to say (g). I've tried xmlinclude and xmlincludeattribute, to
no avail. Seems to be some confusion about whether I should use gettype()
or typeof(), but have tried both. I added the "type:=" construct, but that
didn't matter one way or the other. What a quaint and convoluted language
MS has produced. - Jeremy

> Opps ... replace with the appropriate attribute :)
>
> Alex

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System.InvalidOperationException: The type myobject[] may not be used in this context.

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