Error using object type array.

[William Apple]

Despite the fact this deals with webservices I believe it is a VB question.

I am working on a test application that passes data to a webservice.
The webservices takes a variable type that is defined below:

Public Class Variable
Inherits MarshalByRefObj ect

'<remarks/>
Public strVariableName As String

'<remarks/>
Public objVariableValu e() As Object
End Class

My code is as follows
Dim varList(2) as Variable

varList(0) = New Variable
varList(0).strV ariableName = "Name"
varList(0).objV ariableValue = New Object <- Error Occurs Here
varList(0).objV ariableValue(0) = name

If I use the above code I get a "Specified Cast is not Valid" error.

If I code it this way...

Dim varList(2) as Variable

varList(0) = New Variable
varList(0).strV ariableName = "Name"
varList(0).objV ariableValue(0) = name <-- Error Occurs here

I get "Object reference not set to an instance of an object." as my
error. What am I missing?

[Chris Dunaway]

Re: Error using object type array.

On Tue, 28 Sep 2004 09:14:33 -0400, William Apple wrote:
[color=blue]
> Public Class Variable
> Inherits MarshalByRefObj ect
>
> '<remarks/>
> Public strVariableName As String
>
> '<remarks/>
> Public objVariableValu e() As Object
> End Class
>
> My code is as follows
> Dim varList(2) as Variable
>
> varList(0) = New Variable
> varList(0).strV ariableName = "Name"
> varList(0).objV ariableValue = New Object <- Error Occurs Here
> varList(0).objV ariableValue(0) = name[/color]

You've declared objVariableValu e as an array of objects, so you need to
initialize it as an array of objects and specify a size for the array:

Public objVariableValu e(size) As Object

Or if you didn't mean for objVariableValu e to be an array of objects,
remove the parentheses in the declaration:

'<remarks/>
Public objVariableValu e As Object

Hope this helps

--
Chris

dunawayc[AT]sbcglobal_lunch meat_[DOT]net

To send me an E-mail, remove the "[", "]", underscores ,lunchmeat, and
replace certain words in my E-Mail address.

[Imran Koradia]

Re: Error using object type array.

Chris has answered the first part of your problem. For the second part:
[color=blue]
> If I code it this way...
>
> Dim varList(2) as Variable
>
> varList(0) = New Variable
> varList(0).strV ariableName = "Name"
> varList(0).objV ariableValue(0) = name <-- Error Occurs here[/color]

What variable is 'name'? I don't see it being declared anywhere in the piece
of code you've posted. Is this declared somewhere else? Or did you mean
something like:
varList(0).objV ariableValue(0) = "name"
If so, then you do need to create an instance of the object before assigning
it a value:
varList(0).objV ariableValue(0) = New Object
varList(0).objV ariableValue(0) = "name"


hope that helps..
Imran.

[William Apple]

Re: Error using object type array.

I didn't write the webservice, so I have no control over the declaration of
objVariableValu e. Is it possible to get this to work or is it a bug on their
part?

"Chris Dunaway" <"dunawayc[[at]_lunchmeat_sbcg lobal[dot]]net"> wrote in
message news:ylp1xrrxz4 nh$.tycvapsoapx u$.dlg@40tude.n et...[color=blue]
> On Tue, 28 Sep 2004 09:14:33 -0400, William Apple wrote:
>[color=green]
> > Public Class Variable
> > Inherits MarshalByRefObj ect
> >
> > '<remarks/>
> > Public strVariableName As String
> >
> > '<remarks/>
> > Public objVariableValu e() As Object
> > End Class
> >
> > My code is as follows
> > Dim varList(2) as Variable
> >
> > varList(0) = New Variable
> > varList(0).strV ariableName = "Name"
> > varList(0).objV ariableValue = New Object <- Error Occurs Here
> > varList(0).objV ariableValue(0) = name[/color]
>
> You've declared objVariableValu e as an array of objects, so you need to
> initialize it as an array of objects and specify a size for the array:
>
> Public objVariableValu e(size) As Object
>
> Or if you didn't mean for objVariableValu e to be an array of objects,
> remove the parentheses in the declaration:
>
> '<remarks/>
> Public objVariableValu e As Object
>
> Hope this helps
>
> --
> Chris
>
> dunawayc[AT]sbcglobal_lunch meat_[DOT]net
>
> To send me an E-mail, remove the "[", "]", underscores ,lunchmeat, and
> replace certain words in my E-Mail address.[/color]

[William Apple]

Re: Error using object type array.

My code should have read.....the variable name was declared. How I wish it
was simple stupidity on my part.

Dim varList(2) as Variable
Dim name As Object

name = "xyz"

varList(0) = New Variable
varList(0).strV ariableName = "Name"
varList(0).objV ariableValue = New Object <- Error Occurs Here
varList(0).objV ariableValue(0) = name

If I use the above code I get a "Specified Cast is not Valid" error.

If I code it this way...

Dim varList(2) as Variable

varList(0) = New Variable
varList(0).strV ariableName = "Name"
varList(0).objV ariableValue(0) = name <-- Error Occurs here
"Imran Koradia" <nospam@microso ft.com> wrote in message
news:uaGiS$VpEH A.132@TK2MSFTNG P14.phx.gbl...[color=blue]
> Chris has answered the first part of your problem. For the second part:
>[color=green]
> > If I code it this way...
> >
> > Dim varList(2) as Variable
> >
> > varList(0) = New Variable
> > varList(0).strV ariableName = "Name"
> > varList(0).objV ariableValue(0) = name <-- Error Occurs here[/color]
>
> What variable is 'name'? I don't see it being declared anywhere in the[/color]
piece[color=blue]
> of code you've posted. Is this declared somewhere else? Or did you mean
> something like:
> varList(0).objV ariableValue(0) = "name"
> If so, then you do need to create an instance of the object before[/color]
assigning[color=blue]
> it a value:
> varList(0).objV ariableValue(0) = New Object
> varList(0).objV ariableValue(0) = "name"
>
>
> hope that helps..
> Imran.
>
>[/color]

[Imran Koradia]

Re: Error using object type array.

The problem is that you've not defined the length of the objVariableValu e
array. So, you should do something like this:

Dim varList(2) as Variable
Dim name As Object

name = "xyz"

' this will make your object array of length 3
ReDim varList(0).objV ariableValue(2)

varList(0) = New Variable
varList(0).strV ariableName = "Name"
varList(0).objV ariableValue(0) = New Object
varList(0).objV ariableValue(0) = name


hope that helps..
Imran.

"William Apple" <wapple@nospa m-cisys.com> wrote in message
news:uYqgIEWpEH A.3868@TK2MSFTN GP15.phx.gbl...[color=blue]
> My code should have read.....the variable name was declared. How I wish it
> was simple stupidity on my part.
>
> Dim varList(2) as Variable
> Dim name As Object
>
> name = "xyz"
>
> varList(0) = New Variable
> varList(0).strV ariableName = "Name"
> varList(0).objV ariableValue = New Object <- Error Occurs Here
> varList(0).objV ariableValue(0) = name
>
> If I use the above code I get a "Specified Cast is not Valid" error.
>
> If I code it this way...
>
> Dim varList(2) as Variable
>
> varList(0) = New Variable
> varList(0).strV ariableName = "Name"
> varList(0).objV ariableValue(0) = name <-- Error Occurs here
> "Imran Koradia" <nospam@microso ft.com> wrote in message
> news:uaGiS$VpEH A.132@TK2MSFTNG P14.phx.gbl...[color=green]
> > Chris has answered the first part of your problem. For the second part:
> >[color=darkred]
> > > If I code it this way...
> > >
> > > Dim varList(2) as Variable
> > >
> > > varList(0) = New Variable
> > > varList(0).strV ariableName = "Name"
> > > varList(0).objV ariableValue(0) = name <-- Error Occurs here[/color]
> >
> > What variable is 'name'? I don't see it being declared anywhere in the[/color]
> piece[color=green]
> > of code you've posted. Is this declared somewhere else? Or did you mean
> > something like:
> > varList(0).objV ariableValue(0) = "name"
> > If so, then you do need to create an instance of the object before[/color]
> assigning[color=green]
> > it a value:
> > varList(0).objV ariableValue(0) = New Object
> > varList(0).objV ariableValue(0) = "name"
> >
> >
> > hope that helps..
> > Imran.
> >
> >[/color]
>
>[/color]

[William Apple]

Re: Error using object type array.

Thanks, that works. I also found this to work also

varlist(0).objV ariableValue = New Object(2) {}

"Imran Koradia" <nospam@microso ft.com> wrote in message
news:%23z3yINWp EHA.2948@TK2MSF TNGP11.phx.gbl. ..[color=blue]
> The problem is that you've not defined the length of the objVariableValu e
> array. So, you should do something like this:
>
> Dim varList(2) as Variable
> Dim name As Object
>
> name = "xyz"
>
> ' this will make your object array of length 3
> ReDim varList(0).objV ariableValue(2)
>
> varList(0) = New Variable
> varList(0).strV ariableName = "Name"
> varList(0).objV ariableValue(0) = New Object
> varList(0).objV ariableValue(0) = name
>
>
> hope that helps..
> Imran.
>
> "William Apple" <wapple@nospa m-cisys.com> wrote in message
> news:uYqgIEWpEH A.3868@TK2MSFTN GP15.phx.gbl...[color=green]
> > My code should have read.....the variable name was declared. How I wish[/color][/color]
it[color=blue][color=green]
> > was simple stupidity on my part.
> >
> > Dim varList(2) as Variable
> > Dim name As Object
> >
> > name = "xyz"
> >
> > varList(0) = New Variable
> > varList(0).strV ariableName = "Name"
> > varList(0).objV ariableValue = New Object <- Error Occurs Here
> > varList(0).objV ariableValue(0) = name
> >
> > If I use the above code I get a "Specified Cast is not Valid" error.
> >
> > If I code it this way...
> >
> > Dim varList(2) as Variable
> >
> > varList(0) = New Variable
> > varList(0).strV ariableName = "Name"
> > varList(0).objV ariableValue(0) = name <-- Error Occurs here
> > "Imran Koradia" <nospam@microso ft.com> wrote in message
> > news:uaGiS$VpEH A.132@TK2MSFTNG P14.phx.gbl...[color=darkred]
> > > Chris has answered the first part of your problem. For the second[/color][/color][/color]
part:[color=blue][color=green][color=darkred]
> > >
> > > > If I code it this way...
> > > >
> > > > Dim varList(2) as Variable
> > > >
> > > > varList(0) = New Variable
> > > > varList(0).strV ariableName = "Name"
> > > > varList(0).objV ariableValue(0) = name <-- Error Occurs here
> > >
> > > What variable is 'name'? I don't see it being declared anywhere in the[/color]
> > piece[color=darkred]
> > > of code you've posted. Is this declared somewhere else? Or did you[/color][/color][/color]
mean[color=blue][color=green][color=darkred]
> > > something like:
> > > varList(0).objV ariableValue(0) = "name"
> > > If so, then you do need to create an instance of the object before[/color]
> > assigning[color=darkred]
> > > it a value:
> > > varList(0).objV ariableValue(0) = New Object
> > > varList(0).objV ariableValue(0) = "name"
> > >
> > >
> > > hope that helps..
> > > Imran.
> > >
> > >[/color]
> >
> >[/color]
>
>[/color]

[Imran Koradia]

Re: Error using object type array.

Yup - thats fine too. However, if you just want to assign the variable
'name' to the object, you don't necessarily have to create a new instance
(which is what's happening with New Object(2) {}) since the instance already
exists (the 'name' instance) and you directly assign the reference to it.
Just a thought...

Imran.

"William Apple" <wapple@nospa m-cisys.com> wrote in message
news:uTKjyQWpEH A.2636@TK2MSFTN GP09.phx.gbl...[color=blue]
> Thanks, that works. I also found this to work also
>
> varlist(0).objV ariableValue = New Object(2) {}
>
> "Imran Koradia" <nospam@microso ft.com> wrote in message
> news:%23z3yINWp EHA.2948@TK2MSF TNGP11.phx.gbl. ..[color=green]
> > The problem is that you've not defined the length of the[/color][/color]
objVariableValu e[color=blue][color=green]
> > array. So, you should do something like this:
> >
> > Dim varList(2) as Variable
> > Dim name As Object
> >
> > name = "xyz"
> >
> > ' this will make your object array of length 3
> > ReDim varList(0).objV ariableValue(2)
> >
> > varList(0) = New Variable
> > varList(0).strV ariableName = "Name"
> > varList(0).objV ariableValue(0) = New Object
> > varList(0).objV ariableValue(0) = name
> >
> >
> > hope that helps..
> > Imran.
> >
> > "William Apple" <wapple@nospa m-cisys.com> wrote in message
> > news:uYqgIEWpEH A.3868@TK2MSFTN GP15.phx.gbl...[color=darkred]
> > > My code should have read.....the variable name was declared. How I[/color][/color][/color]
wish[color=blue]
> it[color=green][color=darkred]
> > > was simple stupidity on my part.
> > >
> > > Dim varList(2) as Variable
> > > Dim name As Object
> > >
> > > name = "xyz"
> > >
> > > varList(0) = New Variable
> > > varList(0).strV ariableName = "Name"
> > > varList(0).objV ariableValue = New Object <- Error Occurs Here
> > > varList(0).objV ariableValue(0) = name
> > >
> > > If I use the above code I get a "Specified Cast is not Valid" error.
> > >
> > > If I code it this way...
> > >
> > > Dim varList(2) as Variable
> > >
> > > varList(0) = New Variable
> > > varList(0).strV ariableName = "Name"
> > > varList(0).objV ariableValue(0) = name <-- Error Occurs here
> > > "Imran Koradia" <nospam@microso ft.com> wrote in message
> > > news:uaGiS$VpEH A.132@TK2MSFTNG P14.phx.gbl...
> > > > Chris has answered the first part of your problem. For the second[/color][/color]
> part:[color=green][color=darkred]
> > > >
> > > > > If I code it this way...
> > > > >
> > > > > Dim varList(2) as Variable
> > > > >
> > > > > varList(0) = New Variable
> > > > > varList(0).strV ariableName = "Name"
> > > > > varList(0).objV ariableValue(0) = name <-- Error Occurs here
> > > >
> > > > What variable is 'name'? I don't see it being declared anywhere in[/color][/color][/color]
the[color=blue][color=green][color=darkred]
> > > piece
> > > > of code you've posted. Is this declared somewhere else? Or did you[/color][/color]
> mean[color=green][color=darkred]
> > > > something like:
> > > > varList(0).objV ariableValue(0) = "name"
> > > > If so, then you do need to create an instance of the object before
> > > assigning
> > > > it a value:
> > > > varList(0).objV ariableValue(0) = New Object
> > > > varList(0).objV ariableValue(0) = "name"
> > > >
> > > >
> > > > hope that helps..
> > > > Imran.
> > > >
> > > >
> > >
> > >[/color]
> >
> >[/color]
>
>[/color]