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dotnet xml : System.NullReferenceException during XML Deserialization
deserializing an XmlNode. The XmlNode is pass as part of a call to IConfigurationSectionHandler.Create. My XML looks like: <sectionName> <settings> ... ... ... </settings> </sectionName> I have define my class as such: [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] public class MyAppSettings { .... } I am passing my XmlNode to the XmlSerializer like so: return serializer.Deserialize( new XmlNodeReader( section.ChildNodes[0] ) ); What happens is I get an System.NullReferenceException eminating from the System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine which is being called by the dynamically created derivative XmlSerializationReader code. I can see this in the stack trace. Perhaps someone can shed some light on this? -- -- David B. Bitton david@codenoevil.com www.codenoevil.com Code Made Fresh DailyT
David,
Can you take a look at my troubleshooting article on MSDN and let me know if that helped diagnosing the problem? -- HTH Christoph Schittko [MVP] Software Architect, .NET Mentor [0] http://msdn.microsoft.com/xml/default.aspx?pull=/library/en-us/dnxmlnet/html/trblshtxsd.asp [quoted text, click to view] "David B. Bitton" <david@codenoevil.com> wrote in message news:O7GgCekUEHA.2944@tk2msftngp13.phx.gbl... > I'm experiencing odd behavior on the part of the XMLSerializer. I'm > deserializing an XmlNode. The XmlNode is pass as part of a call to > IConfigurationSectionHandler.Create. My XML looks like: > > <sectionName> > <settings> > ... > ... > ... > </settings> > </sectionName> > > I have define my class as such: > > [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] > public class MyAppSettings > { > ... > } > > I am passing my XmlNode to the XmlSerializer like so: > > return serializer.Deserialize( new XmlNodeReader( > section.ChildNodes[0] ) ); > > What happens is I get an System.NullReferenceException eminating from the > System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine > which > is being called by the dynamically created derivative > XmlSerializationReader > code. I can see this in the stack trace. > > Perhaps someone can shed some light on this? > > > > > -- > -- > > David B. Bitton > david@codenoevil.com > www.codenoevil.com > > Code Made Fresh DailyT > >
Chris,
I'll take a look at the site, but before I do, let me tell you about what I did to get it to work. Once I removed all of the whitespace in the XML, then it was OK. Basically, i changed it to: <sectionName><settings>...</settings></sectionName> and magically it started to work. One thing I noticed is that when I looked at the XmlNodeReader in the cmd window, after I called Read() once, the value was "\t\t\r\n\" which obviously is a whitespace node. Looks like that was what the dynamic code was attempting to interpret. -- -- David B. Bitton david@codenoevil.com www.codenoevil.com Code Made Fresh Daily™ "Christoph Schittko [MVP]" <christophdotnetINVALID@austin.rr.com> wrote in message news:%23f0RjeuUEHA.3076@TK2MSFTNGP10.phx.gbl... [quoted text, click to view] > David, > > Can you take a look at my troubleshooting article on MSDN and let me know if > that helped diagnosing the problem? > > > -- > HTH > Christoph Schittko [MVP] > Software Architect, .NET Mentor > > [0] > http://msdn.microsoft.com/xml/default.aspx?pull=/library/en-us/dnxmlnet/html/trblshtxsd.asp > > > "David B. Bitton" <david@codenoevil.com> wrote in message > news:O7GgCekUEHA.2944@tk2msftngp13.phx.gbl... > > I'm experiencing odd behavior on the part of the XMLSerializer. I'm > > deserializing an XmlNode. The XmlNode is pass as part of a call to > > IConfigurationSectionHandler.Create. My XML looks like: > > > > <sectionName> > > <settings> > > ... > > ... > > ... > > </settings> > > </sectionName> > > > > I have define my class as such: > > > > [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] > > public class MyAppSettings > > { > > ... > > } > > > > I am passing my XmlNode to the XmlSerializer like so: > > > > return serializer.Deserialize( new XmlNodeReader( > > section.ChildNodes[0] ) ); > > > > What happens is I get an System.NullReferenceException eminating from the > > System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine > > which > > is being called by the dynamically created derivative > > XmlSerializationReader > > code. I can see this in the stack trace. > > > > Perhaps someone can shed some light on this? > > > > > > > > > > -- > > -- > > > > David B. Bitton > > david@codenoevil.com > > www.codenoevil.com > > > > Code Made Fresh DailyT > > > > > >
Chris,
I read the page and I don;t see anything that'll help. Like I said, if I delete all of the whitespace between elements and have the XML all on one line, it works just fine. This is both weird and annoying. -- -- David B. Bitton david@codenoevil.com www.codenoevil.com Code Made Fresh Daily™ "Christoph Schittko [MVP]" <christophdotnetINVALID@austin.rr.com> wrote in message news:%23f0RjeuUEHA.3076@TK2MSFTNGP10.phx.gbl... [quoted text, click to view] > David, > > Can you take a look at my troubleshooting article on MSDN and let me know if > that helped diagnosing the problem? > > > -- > HTH > Christoph Schittko [MVP] > Software Architect, .NET Mentor > > [0] > http://msdn.microsoft.com/xml/default.aspx?pull=/library/en-us/dnxmlnet/html/trblshtxsd.asp > > > "David B. Bitton" <david@codenoevil.com> wrote in message > news:O7GgCekUEHA.2944@tk2msftngp13.phx.gbl... > > I'm experiencing odd behavior on the part of the XMLSerializer. I'm > > deserializing an XmlNode. The XmlNode is pass as part of a call to > > IConfigurationSectionHandler.Create. My XML looks like: > > > > <sectionName> > > <settings> > > ... > > ... > > ... > > </settings> > > </sectionName> > > > > I have define my class as such: > > > > [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] > > public class MyAppSettings > > { > > ... > > } > > > > I am passing my XmlNode to the XmlSerializer like so: > > > > return serializer.Deserialize( new XmlNodeReader( > > section.ChildNodes[0] ) ); > > > > What happens is I get an System.NullReferenceException eminating from the > > System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine > > which > > is being called by the dynamically created derivative > > XmlSerializationReader > > code. I can see this in the stack trace. > > > > Perhaps someone can shed some light on this? > > > > > > > > > > -- > > -- > > > > David B. Bitton > > david@codenoevil.com > > www.codenoevil.com > > > > Code Made Fresh DailyT > > > > > >
As even more clarification, I installed my code on another machine and I
received the same error. -- -- David B. Bitton david@codenoevil.com www.codenoevil.com Code Made Fresh Daily™ "Christoph Schittko [MVP]" <christophdotnetINVALID@austin.rr.com> wrote in message news:%23f0RjeuUEHA.3076@TK2MSFTNGP10.phx.gbl... [quoted text, click to view] > David, > > Can you take a look at my troubleshooting article on MSDN and let me know if > that helped diagnosing the problem? > > > -- > HTH > Christoph Schittko [MVP] > Software Architect, .NET Mentor > > [0] > http://msdn.microsoft.com/xml/default.aspx?pull=/library/en-us/dnxmlnet/html/trblshtxsd.asp > > > "David B. Bitton" <david@codenoevil.com> wrote in message > news:O7GgCekUEHA.2944@tk2msftngp13.phx.gbl... > > I'm experiencing odd behavior on the part of the XMLSerializer. I'm > > deserializing an XmlNode. The XmlNode is pass as part of a call to > > IConfigurationSectionHandler.Create. My XML looks like: > > > > <sectionName> > > <settings> > > ... > > ... > > ... > > </settings> > > </sectionName> > > > > I have define my class as such: > > > > [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] > > public class MyAppSettings > > { > > ... > > } > > > > I am passing my XmlNode to the XmlSerializer like so: > > > > return serializer.Deserialize( new XmlNodeReader( > > section.ChildNodes[0] ) ); > > > > What happens is I get an System.NullReferenceException eminating from the > > System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine > > which > > is being called by the dynamically created derivative > > XmlSerializationReader > > code. I can see this in the stack trace. > > > > Perhaps someone can shed some light on this? > > > > > > > > > > -- > > -- > > > > David B. Bitton > > david@codenoevil.com > > www.codenoevil.com > > > > Code Made Fresh DailyT > > > > > >
david,
could we see the actual XML file and its schema? thanks. dlr [quoted text, click to view] "David B. Bitton" <david@codenoevil.com> wrote in message news:uwBTsO%23UEHA.2544@TK2MSFTNGP10.phx.gbl... > As even more clarification, I installed my code on another machine and I > received the same error. > > -- > -- > > David B. Bitton > david@codenoevil.com > www.codenoevil.com > > Code Made Fresh Daily™ > "Christoph Schittko [MVP]" <christophdotnetINVALID@austin.rr.com> wrote in > message news:%23f0RjeuUEHA.3076@TK2MSFTNGP10.phx.gbl... > > David, > > > > Can you take a look at my troubleshooting article on MSDN and let me know > if > > that helped diagnosing the problem? > > > > > > -- > > HTH > > Christoph Schittko [MVP] > > Software Architect, .NET Mentor > > > > [0] > > > http://msdn.microsoft.com/xml/default.aspx?pull=/library/en-us/dnxmlnet/html/trblshtxsd.asp > > > > > > "David B. Bitton" <david@codenoevil.com> wrote in message > > news:O7GgCekUEHA.2944@tk2msftngp13.phx.gbl... > > > I'm experiencing odd behavior on the part of the XMLSerializer. I'm > > > deserializing an XmlNode. The XmlNode is pass as part of a call to > > > IConfigurationSectionHandler.Create. My XML looks like: > > > > > > <sectionName> > > > <settings> > > > ... > > > ... > > > ... > > > </settings> > > > </sectionName> > > > > > > I have define my class as such: > > > > > > [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] > > > public class MyAppSettings > > > { > > > ... > > > } > > > > > > I am passing my XmlNode to the XmlSerializer like so: > > > > > > return serializer.Deserialize( new XmlNodeReader( > > > section.ChildNodes[0] ) ); > > > > > > What happens is I get an System.NullReferenceException eminating from > the > > > System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine > > > which > > > is being called by the dynamically created derivative > > > XmlSerializationReader > > > code. I can see this in the stack trace. > > > > > > Perhaps someone can shed some light on this? > > > > > > > > > > > > > > > -- > > > -- > > > > > > David B. Bitton > > > david@codenoevil.com > > > www.codenoevil.com > > > > > > Code Made Fresh DailyT > > > > > > > > > > > >
Dennis,
I've determined that the problem lies with ConfigXmlElement (which is a internal class of ConfigXmlDocument). I started a new thread, ConfigXmlDocument Handles Whitespace Improperly. I detailed what I've found so far and how it causes XmlSerializer to fail. -- -- David B. Bitton david@codenoevil.com www.codenoevil.com Code Made Fresh Daily™ [quoted text, click to view] "Dennis Redfield" <dennis.redfield@acadia-ins.com> wrote in message news:%23DKsGpIVEHA.808@tk2msftngp13.phx.gbl... > david, > could we see the actual XML file and its schema? > thanks. > dlr > "David B. Bitton" <david@codenoevil.com> wrote in message > news:uwBTsO%23UEHA.2544@TK2MSFTNGP10.phx.gbl... > > As even more clarification, I installed my code on another machine and I > > received the same error. > > > > -- > > -- > > > > David B. Bitton > > david@codenoevil.com > > www.codenoevil.com > > > > Code Made Fresh Daily™ > > "Christoph Schittko [MVP]" <christophdotnetINVALID@austin.rr.com> wrote in > > message news:%23f0RjeuUEHA.3076@TK2MSFTNGP10.phx.gbl... > > > David, > > > > > > Can you take a look at my troubleshooting article on MSDN and let me > know > > if > > > that helped diagnosing the problem? > > > > > > > > > -- > > > HTH > > > Christoph Schittko [MVP] > > > Software Architect, .NET Mentor > > > > > > [0] > > > > > > http://msdn.microsoft.com/xml/default.aspx?pull=/library/en-us/dnxmlnet/html/trblshtxsd.asp > > > > > > > > > "David B. Bitton" <david@codenoevil.com> wrote in message > > > news:O7GgCekUEHA.2944@tk2msftngp13.phx.gbl... > > > > I'm experiencing odd behavior on the part of the XMLSerializer. I'm > > > > deserializing an XmlNode. The XmlNode is pass as part of a call to > > > > IConfigurationSectionHandler.Create. My XML looks like: > > > > > > > > <sectionName> > > > > <settings> > > > > ... > > > > ... > > > > ... > > > > </settings> > > > > </sectionName> > > > > > > > > I have define my class as such: > > > > > > > > [XmlRoot(Namespace="", IsNullable=false, ElementName="settings")] > > > > public class MyAppSettings > > > > { > > > > ... > > > > } > > > > > > > > I am passing my XmlNode to the XmlSerializer like so: > > > > > > > > return serializer.Deserialize( new XmlNodeReader( > > > > section.ChildNodes[0] ) ); > > > > > > > > What happens is I get an System.NullReferenceException eminating from > > the > > > > System.Xml.Serialization.XmlSerializationReader.UnknownNode() routine > > > > which > > > > is being called by the dynamically created derivative > > > > XmlSerializationReader > > > > code. I can see this in the stack trace. > > > > > > > > Perhaps someone can shed some light on this? > > > > > > > > > > > > > > > > > > > > -- > > > > -- > > > > > > > > David B. Bitton > > > > david@codenoevil.com > > > > www.codenoevil.com > > > > > > > > Code Made Fresh DailyT > > > > > > > > > > > > > > > > > > > >
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