For some reason myFunction in the below code is treating the parameter
oInputDoc1 as a ByRef rather than a ByVal. When the call returns, both
oInputDoc and oOutputDoc = "<root><name>St eve Jobs</name></root>"
When using a string instead of an xml document as the parameter the
argument and value remain ByVal and the results are as I would expect.
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
'Put user code to initialize the page here
Dim s As String = "<root><name>Bi ll Gates</name></root>"
Dim oInputDoc As System.Xml.XmlD ocument = New
System.Xml.XmlD ocument
Dim oOutputDoc As System.Xml.XmlD ocument = New
System.Xml.XmlD ocument
oInputDoc.LoadX ml(s)
oOutputDoc = myFunction(oInp utDoc)
Response.Write( oInputDoc.Outer Xml)
Response.Write( "<BR>")
Response.Write( oOutputDoc.Oute rXml)
End Sub
Private Function myFunction(ByVa l oInputDoc1 As System.Xml.XmlD ocument)
As System.Xml.XmlD ocument
Dim s As String = "<root><name>St eve Jobs</name></root>"
oInputDoc1.Load Xml(s)
Return oInputDoc1
End Function 6 1082
I am having the same issue. Let me know if you find a solution.
"df******@parke r.com" wrote: For some reason myFunction in the below code is treating the parameter oInputDoc1 as a ByRef rather than a ByVal. When the call returns, both oInputDoc and oOutputDoc = "<root><name>St eve Jobs</name></root>"
When using a string instead of an xml document as the parameter the argument and value remain ByVal and the results are as I would expect.
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load 'Put user code to initialize the page here Dim s As String = "<root><name>Bi ll Gates</name></root>" Dim oInputDoc As System.Xml.XmlD ocument = New System.Xml.XmlD ocument Dim oOutputDoc As System.Xml.XmlD ocument = New System.Xml.XmlD ocument oInputDoc.LoadX ml(s) oOutputDoc = myFunction(oInp utDoc) Response.Write( oInputDoc.Outer Xml) Response.Write( "<BR>") Response.Write( oOutputDoc.Oute rXml) End Sub
Private Function myFunction(ByVa l oInputDoc1 As System.Xml.XmlD ocument) As System.Xml.XmlD ocument Dim s As String = "<root><name>St eve Jobs</name></root>" oInputDoc1.Load Xml(s) Return oInputDoc1 End Function
Passing an object reference ByVal just protects the reference from changing,
not the state of the object. i.e., you're not passing the entire object,
just the object reference.
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"df******@parke r.com" wrote: For some reason myFunction in the below code is treating the parameter oInputDoc1 as a ByRef rather than a ByVal. When the call returns, both oInputDoc and oOutputDoc = "<root><name>St eve Jobs</name></root>"
When using a string instead of an xml document as the parameter the argument and value remain ByVal and the results are as I would expect.
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load 'Put user code to initialize the page here Dim s As String = "<root><name>Bi ll Gates</name></root>" Dim oInputDoc As System.Xml.XmlD ocument = New System.Xml.XmlD ocument Dim oOutputDoc As System.Xml.XmlD ocument = New System.Xml.XmlD ocument oInputDoc.LoadX ml(s) oOutputDoc = myFunction(oInp utDoc) Response.Write( oInputDoc.Outer Xml) Response.Write( "<BR>") Response.Write( oOutputDoc.Oute rXml) End Sub
Private Function myFunction(ByVa l oInputDoc1 As System.Xml.XmlD ocument) As System.Xml.XmlD ocument Dim s As String = "<root><name>St eve Jobs</name></root>" oInputDoc1.Load Xml(s) Return oInputDoc1 End Function
Check this out, http://msdn.microsoft.com/library/de...ingbyvalue.asp.
--
Carsten Thomsen
Enterprise Development with VS .NET, UML, AND MSF http://www.apress.com/book/bookDisplay.html?bID=105
Communities - http://community.integratedsolutions.dk
<df******@parke r.com> wrote in message
news:11******** **************@ z14g2000cwz.goo glegroups.com.. . For some reason myFunction in the below code is treating the parameter oInputDoc1 as a ByRef rather than a ByVal. When the call returns, both oInputDoc and oOutputDoc = "<root><name>St eve Jobs</name></root>"
When using a string instead of an xml document as the parameter the argument and value remain ByVal and the results are as I would expect.
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load 'Put user code to initialize the page here Dim s As String = "<root><name>Bi ll Gates</name></root>" Dim oInputDoc As System.Xml.XmlD ocument = New System.Xml.XmlD ocument Dim oOutputDoc As System.Xml.XmlD ocument = New System.Xml.XmlD ocument oInputDoc.LoadX ml(s) oOutputDoc = myFunction(oInp utDoc) Response.Write( oInputDoc.Outer Xml) Response.Write( "<BR>") Response.Write( oOutputDoc.Oute rXml) End Sub
Private Function myFunction(ByVa l oInputDoc1 As System.Xml.XmlD ocument) As System.Xml.XmlD ocument Dim s As String = "<root><name>St eve Jobs</name></root>" oInputDoc1.Load Xml(s) Return oInputDoc1 End Function
dferr...@parker .com wrote: For some reason myFunction in the below code is treating the parameter oInputDoc1 as a ByRef rather than a ByVal. When the call returns, both oInputDoc and oOutputDoc = "<root><name>St eve Jobs</name></root>"
It is working just as it is supposed to. In your function, what gets
passed is a copy of the *reference* to the XmlDocument, not a copy of
the document itself. Thus, you have two different references to the
same object. So, inside your function, if you were to change the
*reference*, then the original reference would not be affected:
If you code were to do this:
Private Function myFunction(ByVa l oInputDoc1 As System.Xml.XmlD ocument) As System.Xml.XmlD ocument
oInputDoc1 = New XmlDocument End Function
Then your original document would not be affected.
When you pass a reference type ByVal, you get a copy of the reference.
When you pass a reference type ByRef, you pass the actual reference.
Either way, any changes you make to the properties,etc. will affect the
original object that each points to.
<df******@parke r.com> schrieb: For some reason myFunction in the below code is treating the parameter oInputDoc1 as a ByRef rather than a ByVal. When the call returns, both oInputDoc and oOutputDoc = "<root><name>St eve Jobs</name></root>"
See:
<URL:http://groups.google.d e/group/microsoft.publi c.dotnet.langua ges.vb/msg/25064a4fedd3663 3>
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
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