System.IO.IOException - XML

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System.IO.IOException

8/20/2008 12:03 AM

Howard Strug

Joined: 10/15/2007

Posts: 3

System.IO.IOException

I have written an application that modifies an XML file containing the data required for my transformation. Everything works great in my development environment, but in production (godaddy.com), I get the follow error...

Error: System.IO.IOException: The process cannot access the file 'd:\hosting\gkuhn2\home\Portals\0\UpdatablePages\updatable_pages.xml' because it is being used by another process. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.File.Delete(String path) at IMG_updatepages.PublishNewXml(XmlDocument& xdocNew, String root)

Here is the chain of events that leads to the error:

Create, modifiy and save an XML file using XMLDocument
View a page that consumes the XML using the XML Module
Execute the create, modify, save process again. This time the error is thrown.
If I restart the application via the Host properties menu and repeat from step 1, the exact same thing happens.

So far I know the following.

A. It only happens in production

B. The XmlReader returned by the XmlSource property of the XmlController class does not seem to dispose of the XmlReader properly. I am wondering if this might be the cause, eventhough it only happends in production.

Thanks in advance.

Does anyone have any insite into this problem?

8/21/2008 5:04 PM

Stefan Cullmann

Joined: 1/6/2005

Posts: 2867

Re: System.IO.IOException

MachDev, Iam not aware of that issue. I am not working with XML files in production for myself, always against URLs.

However, if you are right, open APP_CODE/XML/components/XmlController.vb with an editor (Notepad is fine) and replace the Render Section with this code:

#Region "| Rendering |"

        ''' 
        ''' Returns the result of the XSL Transformation into a TextWriter. 
        ''' 
        Public Sub Render(ByVal output As TextWriter)
            Dim Xslt As XslCompiledTransform = GetXslTransform()
            Using Xml As XmlReader = XmlSource
                If Not Xslt Is Nothing And Not Xml Is Nothing Then
                    Xslt.Transform(Xml, TransformArgumentList, output)
                End If
            End Using
        End Sub

        ''' 
        ''' Returns the result of the XSL transformation into a Stream
        ''' 
        Public Sub Render(ByVal stream As System.IO.Stream)
            Dim Xslt As XslCompiledTransform = GetXslTransform()
            Using Xml As XmlReader = XmlSource
                If Not Xslt Is Nothing And Not Xml Is Nothing Then
                    Xslt.Transform(XmlSource, TransformArgumentList, stream)
                End If
            End Using
        End Sub
#End Region

8/22/2008 3:00 AM

Howard Strug

Joined: 10/15/2007

Posts: 3

Re: System.IO.IOException

That did the trick. I was going to try exactly that, but I didn't want to start chasing my own tail on this one. Figured you might have heard of this one before, so I took a shot at a forum post.

I am guessing that in development my IIS worker process was set to recycle more frequently then on godaddy.com. Thus, the appearence that it was working properly in development.

Thanks for your help.

Regards,

Jeff Gochin

www.keystonecomputer.biz

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System.IO.IOException

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