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Sending <CapturePayment /> as XML using Serialize

Posted on 2013-10-28
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Last Modified: 2013-10-29
I have a block of XML I need to send to a client. I use an xsd.exe generated object to create my XML using Serialize.

I need to send one line of XML which results in being a command to tell the client to process the payment:
<CapturePayment />

How do I set my object to generate this one line?
I have tried setting it as an empty string:
 ou.CapturePayment = ""
or setting it to true:
 ou.CapturePayment = true
or setting it to nothing:
 ou.CapturePayment = Nothing

First two error. Second just excludes the line.

The empty string creates this line:
<CapturePayment xsi:type="xsd:string" />
 and errors with this:
The xsi:type attribute value 'http://www.w3.org/2001/XMLSchema:string' is not valid for the element 'CapturePayment', either because it is not a type validly derived from the type in the schema, or because it has xsi:type derivation blocked.

I also tried setting this:
      <XmlElement(IsNullable:=True)>
      Public Property CapturePayment() As Object
Which when setting it to nothing generates this and the error:
ou.CapturePayment = Nothing
   <CapturePayment xsi:nil="true" />
  <ErrorDescription>If the 'nillable' attribute is false in the schema, the 'xsi:nil' attribute must not be present in the instance.</ErrorDescription>

I know I can strip out the value:
str = Replace(str, "xsi:nil=""true"" ", "") ' strip out for CapturePayment
But is there a better way?

How do I get my object to include that line just as this? <CapturePayment />

Thanks!
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Question by:BobCSD
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Expert Comment

by:Bob Learned
ID: 39608820
Can you show the schema that you are working with?
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Author Comment

by:BobCSD
ID: 39608907
Here is the XML:

<?xml version="1.0" encoding="UTF-8" ?>
<OrderUpdateRequest>
   <Credentials>
      <AccountName>AccountName</AccountName>
      <Key>YOUR XML KEY</Key>
   </Credentials>
   <OrderUpdate>
      <OrderNo>102375</OrderNo>
      <StatusUpdate>
         <Status>Shipped</Status>
      </StatusUpdate>
      <CapturePayment />
   </OrderUpdate>
</OrderUpdateRequest>

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Author Comment

by:BobCSD
ID: 39608915
Here is the schema:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
   <xs:element name="OrderUpdateRequest">
      <xs:complexType>
         <xs:sequence>
            <xs:element name="Credentials">
               <xs:complexType>
                  <xs:sequence>
                     <xs:element name="AccountName" type="xs:string" />
                     <xs:element name="Key" type="xs:string" />
                  </xs:sequence>
               </xs:complexType>
            </xs:element>
            <xs:element name="OrderUpdate">
               <xs:complexType>
                  <xs:sequence>
                     <xs:element name="OrderNo" type="xs:unsignedInt" />
                     <xs:element name="StatusUpdate">
                        <xs:complexType>
                           <xs:sequence>
                              <xs:element name="Status" type="xs:string" />
                           </xs:sequence>
                        </xs:complexType>
                     </xs:element>
                     <xs:element name="CapturePayment" />
                  </xs:sequence>
               </xs:complexType>
            </xs:element>
         </xs:sequence>
      </xs:complexType>
   </xs:element>
</xs:schema>

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Expert Comment

by:Bob Learned
ID: 39608949
What are you using to serialize the XML?
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LVL 96

Expert Comment

by:Bob Learned
ID: 39608982
I see that CapturePayment does not have any type in the XSD.  Is this supposed to be a "presence" element to indicate the operation desired (with no other children or attributes?
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Author Comment

by:BobCSD
ID: 39609040
Yes.

>>I need to send one line of XML which results in being a command to tell the client to process the payment:
<CapturePayment />
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Author Comment

by:BobCSD
ID: 39609043
      Public Shared Function SerializeAnObject(AnObject As Object) As String
         Dim Xml_Serializer As New XmlSerializer(AnObject.[GetType]())
         Dim Writer As New StringWriter()
         Xml_Serializer.Serialize(Writer, AnObject)
         Return Writer.ToString()
      End Function

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Expert Comment

by:Bob Learned
ID: 39609325
If CapturePayment is an element in the schema, what should the type be?  You might want to try as xs:string, and see how that is generated.
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Author Comment

by:BobCSD
ID: 39609620
As indicated in my first message, I already tried xs:string.
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Accepted Solution

by:
Bob Learned earned 500 total points
ID: 39609762
There might be a disconnect on my side.

"The empty string creates this line:
<CapturePayment xsi:type="xsd:string" />
"

that doesn't sound like you set the type in the .xsd file.  That would have looked like this:

<xs:element name="CapturePayment" type="xs:string" />
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Author Comment

by:BobCSD
ID: 39609782
ok. thanks.
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