How to add xsi:nil="true" to an XML document node using vb.net

[jazzygirl]

I'm fairly new to vb.net (self-taught and realizing how much I DON'T know). I need to create an XML output file (I'm quite ignorant in this area as well!). I used an XMLDataDocument and Xml.XmlTextWrit er, creating each element node since the agency I'm sending the file to is very specific about the format.

How do I specify an element/node/attribute (whatever) to output xsi:nil="true"?


Desired Output:
<D02 xsi:nil="true" />


Current Output:
<D02 xsi:nil="" xmlns:xsi="true " />

Visual Basic Code:
Function Create_XML_File (ByVal xmlObject As MyObject, _
ByRef ioXmlDoc As Xml.XmlDataDocu ment) As Integer
Dim ioRootNode As Xml.XmlNode
Dim ioSubNode As Xml.XmlNode
Dim ioDataNode As Xml.XmlNode
Dim ioObject As New MyProject.MyObj ect

ioObject = xmlObject

' ------------- Dataset Root Node -------------------------------------
ioRootNode = ioXmlDoc.Create Node(Xml.XmlNod eType.Element, "MyDataSet" , "")
ioXmlDoc.Append Child(ioRootNod e)

' ------------- Header Node -------------------------------------
ioSubNode = ioXmlDoc.Create Node(Xml.XmlNod eType.Element, "Header", "")
ioRootNode.Appe ndChild(ioSubNo de)

' ------------- Data Elements -------------------------------------
ioDataNode = ioXmlDoc.Create Node(Xml.XmlNod eType.Element, "D01", "")
ioDataNode.Inne rText = ioObject.D01
ioSubNode.Appen dChild(ioDataNo de)

ioDataNode = ioXmlDoc.Create Node(Xml.XmlNod eType.Element, "D02", "") ioDataNode.Attr ibutes.Append(i oXmlDoc.CreateA ttribute("xsi:n il", IIf(ioObject.D0 2 = "", "true",
ioObject.D02)))
ioSubNode.Appen dChild(ioDataNo de)

~~~~~~~~~~~~~~~

Dim ioWriter As New Xml.XmlTextWrit er(cPath & vFileName, System.Text.ASC IIEncoding.ASCI I)

' Write XML document object to file
ioWriter.Format ting = Xml.Formatting. Indented
ioWriter.WriteS tartDocument()
xmlDoc.WriteCon tentTo(ioWriter )
ioWriter.Close( )

~~~~~~~~~~~~~~~