Passing a stream to a Web Service

[Bob Anderson]

I'd like to set up a VB client app which will allow users to scan
documents into .tif (image) files. I would like to send these
files to Web Service running on a server where they can be stored,
catalogued and referenced.

When I use -

m_WebService1.BeginWrite_Image(ImgStream, strContext,
New AsyncCallback(AddressOf Me.SendImgParmsCallBack), Nothing)

I get the error

Value of type 'System.IO.Stream' cannot be converted to
WindowsApplication.WebReference1.Stream

Any suggestions?



Bob Anderson

[Chris Deceuninck]

"Bob Anderson" <parksys741@hotmail.com> wrote:
>
>I'd like to set up a VB client app which will allow users to scan
>documents into .tif (image) files. I would like to send these
>files to Web Service running on a server where they can be stored,
>catalogued and referenced.
>
>When I use -
>
>m_WebService1.BeginWrite_Image(ImgStream, strContext,
> New AsyncCallback(AddressOf Me.SendImgParmsCallBack), Nothing)
>
> I get the error
>
>Value of type 'System.IO.Stream' cannot be converted to
>WindowsApplication.WebReference1.Stream
>
>Any suggestions?
>
>
>
>Bob Anderson

Bob,

I have experienced the same problem. Somehow it seems logical to me that
the webservice creates a new (proxy) object that is exposed to the 'public'
so that the 'public' using the webservice knows how the object looks like
if the webservice returns one.

I want to do the same with a custom made object (e.g. a Person object) and
when retrieving this object via a webservice with the function GetPerson()
as Person it returns me a Person object created by the webservice but not
my original one. Marking this Person object as serializable or even implementing
custom serialization doesn't really change a thing. However when retrieving
a dataset via a webservice, there seems to be no problem at all. So there's
probably a way...

Anyone a solution?

Chris

[Bob Anderson]

Got the answer in another discussion group. Instead of a stream I used
a byte array and it worked fine.

"Chris Deceuninck" <deceuninck@yahoo.com> wrote:
>
>"Bob Anderson" <parksys741@hotmail.com> wrote:
>>
>>I'd like to set up a VB client app which will allow users to scan
>>documents into .tif (image) files. I would like to send these
>>files to Web Service running on a server where they can be stored,
>>catalogued and referenced.
>>
>>When I use -
>>
>>m_WebService1.BeginWrite_Image(ImgStream, strContext,
>> New AsyncCallback(AddressOf Me.SendImgParmsCallBack), Nothing)
>>
>> I get the error
>>
>>Value of type 'System.IO.Stream' cannot be converted to
>>WindowsApplication.WebReference1.Stream
>>
>>Any suggestions?
>>
>>
>>
>>Bob Anderson
>
>Bob,
>
>I have experienced the same problem. Somehow it seems logical to me that
>the webservice creates a new (proxy) object that is exposed to the 'public'
>so that the 'public' using the webservice knows how the object looks like
>if the webservice returns one.
>
>I want to do the same with a custom made object (e.g. a Person object) and
>when retrieving this object via a webservice with the function GetPerson()
>as Person it returns me a Person object created by the webservice but not
>my original one. Marking this Person object as serializable or even implementing
>custom serialization doesn't really change a thing. However when retrieving
>a dataset via a webservice, there seems to be no problem at all. So there's
>probably a way...
>
>Anyone a solution?
>
>Chris