user xmlns was not expected Deserializing Twitter XML

Question

I m pulling in the XML from Twitter via OAuth  I m doing a request to http   twitter com account verify credentials xml  which returns the following XML   lt  xml version  quot 1 0 quot  encoding  quot UTF-8 quot   gt   lt user gt     lt id gt 16434938 lt  id gt     lt name gt Lloyd Sparkes lt  name gt     lt screen name gt lloydsparkes lt  screen name gt     lt location gt Hockley  Essex  UK lt  location gt     lt description gt Student lt  description gt     lt profile image url gt http   a3 twimg com profile images 351849613 twitterProfilePhoto normal jpg lt  profile image url gt     lt url gt http   www lloydsparkes co uk lt  url gt     lt protected gt false lt  protected gt     lt followers count gt 115 lt  followers count gt     lt profile background color gt 9fdaf4 lt  profile background color gt     lt profile text color gt 000000 lt  profile text color gt     lt profile link color gt 220f7b lt  profile link color gt     lt profile sidebar fill color gt FFF7CC lt  profile sidebar fill color gt     lt profile sidebar border color gt F2E195 lt  profile sidebar border color gt     lt friends count gt 87 lt  friends count gt     lt created at gt Wed Sep 24 14 26 09  0000 2008 lt  created at gt     lt favourites count gt 0 lt  favourites count gt     lt utc offset gt 0 lt  utc offset gt     lt time zone gt London lt  time zone gt     lt profile background image url gt http   s twimg com a 1255366924 images themes theme12 bg gif lt  profile background image url gt     lt profile background tile gt false lt  profile background tile gt     lt statuses count gt 1965 lt  statuses count gt     lt notifications gt false lt  notifications gt     lt geo enabled gt false lt  geo enabled gt     lt verified gt false lt  verified gt     lt following gt false lt  following gt     lt status gt       lt created at gt Mon Oct 12 19 23 47  0000 2009 lt  created at gt       lt id gt 4815268670 lt  id gt       lt text gt  amp  187   alexmuller your kidding  it should all be  amp quot black tie amp quot  dress code lt  text gt       lt source gt  amp lt a href  amp quot http   code google com p wittytwitter  amp quot  rel  amp quot nofollow amp quot  amp gt Witty amp lt  a amp gt  lt  source gt       lt truncated gt false lt  truncated gt       lt in reply to status id gt 4815131457 lt  in reply to status id gt       lt in reply to user id gt 8645442 lt  in reply to user id gt       lt favorited gt false lt  favorited gt       lt in reply to screen name gt alexmuller lt  in reply to screen name gt       lt geo  gt     lt  status gt   lt  user gt   I am using the following code to deserialize       public User VerifyCredentials                 string url    quot http   twitter com account verify credentials xml quot           string xml    oauth oAuthWebRequestAsString oAuthTwitter Method GET  url  null            XmlSerializer xs   new XmlSerializer typeof User   quot  quot             MemoryStream ms   new MemoryStream Encoding UTF8 GetBytes xml             return  User xs Deserialize ms          And I have the following for my User class    System Xml Serialization XmlTypeAttribute AnonymousType   true   public partial class User         XmlElement ElementName    quot id quot               public long Id   get  set          XmlElement ElementName    quot name quot         public string Name   get  set          XmlElement ElementName    quot screen name quot               public string ScreenName   get  set          XmlElement ElementName    quot location quot               public string Location   get  set          XmlElement ElementName    quot description quot              public string Description   get  set          XmlElement ElementName    quot profile image url quot              public string ProfileImageUrl   get  set          XmlElement ElementName    quot url quot               public string Url   get  set          XmlElement ElementName    quot protected quot              public bool Protected   get  set          XmlElement ElementName    quot followers count quot              public int FollowerCount   get  set          XmlElement ElementName    quot profile background color quot               public string ProfileBackgroundColor   get  set          XmlElement ElementName    quot profile text color quot               public string ProfileTextColor   get  set          XmlElement ElementName    quot profile link color quot               public string ProfileLinkColor   get  set          XmlElement ElementName    quot profile sidebar fill color quot               public string ProfileSidebarFillColor   get  set          XmlElement ElementName    quot profile sidebar border color quot              public string ProfileSidebarBorderColor   get  set          XmlElement ElementName    quot friends count quot             public int FriendsCount   get  set          XmlElement ElementName    quot created at quot             public string CreatedAt   get  set          XmlElement ElementName    quot favourties count quot              public int FavouritesCount   get  set          XmlElement ElementName    quot utc offset quot              public int UtcOffset   get  set          XmlElement ElementName    quot time zone quot               public string Timezone   get  set          XmlElement ElementName    quot profile background image url quot                public string ProfileBackgroundImageUrl   get  set          XmlElement ElementName    quot profile background tile quot                public bool ProfileBackgroundTile   get  set          XmlElement ElementName    quot statuese count quot                public int StatusesCount   get  set          XmlElement ElementName    quot notifications quot               public string Notifications   get  set          XmlElement ElementName    quot geo enabled quot               public bool GeoEnabled   get  set          XmlElement ElementName    quot Verified quot                public bool Verified   get  set          XmlElement ElementName    quot following quot        public string Following   get  set          XmlElement ElementName    quot status quot   IsNullable true       public Status CurrentStatus   get  set        But when it s deserializing the above XML the application throws the following    exception   quot There is an error in XML document  2  2   quot   System Exception  System InvalidOperationException    InnerException   quot  lt user xmlns    gt  was not expected  quot      System Exception  System InvalidOperationException   Now I have searched around and the best solution I can find is to add blank namespaces to the serializer when you serialize the content  but i m not serializing it so I can t  I also have some code for receiving Statuses  which works fine  So can someone explain to me why the error is happening  As well as a possible solution

User · Answer

XmlSerializer xs   new XmlSerializer typeof User   new XmlRootAttribute  yourRootName

User · Answer

As John Saunders says  check if the class property names matches the capital casing of your XML  If this isn t the case  the problem will also occur

User · Answer

Even easier is just to add the following annotations to the top of your class    Serializable  XmlRoot  user    public partial class User

User · Answer

The only thing that worked in my case was by using david valentine code  Using Root Attr  in the Person class did not help   I have this simple Xml    lt  xml version  1 0   gt   lt personList gt    lt Person gt     lt FirstName gt AAAA lt  FirstName gt     lt LastName gt BBB lt  LastName gt    lt  Person gt    lt Person gt     lt FirstName gt CCC lt  FirstName gt     lt LastName gt DDD lt  LastName gt    lt  Person gt   lt  personList gt    C  class   public class Person       public string FirstName   get  set        public string LastName   get  set        De-Serialization C  code from a Main method   XmlRootAttribute xRoot   new XmlRootAttribute    xRoot ElementName    personList   xRoot IsNullable   true  using  StreamReader reader   new StreamReader xmlFilePath     List lt Person gt  result    List lt Person gt   new XmlSerializer typeof List lt Person gt    xRoot   Deserialize reader    int numOfPersons   result Count

User · Answer

Either decorate your root entity with the XmlRoot attribute which will be used at compile time    XmlRoot Namespace    www contoso com   ElementName    MyGroupName   DataType    string   IsNullable true     Or specify the root attribute when de serializing at runtime   XmlRootAttribute xRoot   new XmlRootAttribute    xRoot ElementName    user      xRoot Namespace    http   www cpandl com   xRoot IsNullable   true   XmlSerializer xs   new XmlSerializer typeof User  xRoot

User · Answer

My problem was one of my elements had the xmlns attribute    lt  xml version  1 0  encoding  utf-8   gt   lt RETS ReplyCode  0  gt       lt RETS-RESPONSE xmlns  blahblah  gt                   lt  RETS-RESPONSE gt   lt  RETS gt    No matter what I tried the xmlns attribute seemed to be breaking the serializer  so I removed any trace of xmlns       from the xml file    lt  xml version  1 0  encoding  utf-8   gt   lt RETS ReplyCode  0  gt       lt RETS-RESPONSE gt                   lt  RETS-RESPONSE gt   lt  RETS gt    and voila  Everything worked   I now parse the xml file to remove this attribute before deserializing  Not sure why this works  maybe my case is different since the element containing the xmlns attribute is not the root element

User · Answer

My issue was that the root element actually has a xmlns  abc123   So had to make XmlRoot  elementname  NameSpace  abc123

User · Answer

In my case  my xml had multiple namespaces and attributes   So I used this site to generate the objects - https   xmltocsharp azurewebsites net    And used the below code to deserialize    XmlDocument doc    new XmlDocument            doc Load  PathTo xml            User obj          using  TextReader textReader   new StringReader doc OuterXml                         using  XmlTextReader reader   new XmlTextReader textReader                                 XmlSerializer serializer   new XmlSerializer typeof User                    obj    User serializer Deserialize reader

User · Answer

The simplest and best solution is just to use XMLRoot attribute in your class  in which you wish to deserialize    Like    XmlRoot ElementName    YourPreferableNameHere    public class MyClass          Also  use the following Assembly    using System Xml Serialization

User · Answer

All above not worked for me  but this was  Check that the name of Root element of class is exactly like the one from XML case sensitive

User · Answer

The error message is so vague  for me I had this code   var streamReader   new StreamReader response GetResponseStream     var xmlSerializer   new XmlSerializer typeof aResponse    theResponse    bResponse  xmlSerializer Deserialize streamReader     Notice xmlSerializer is instantiated with aResponse but on deserializing I accidentally casted it to bResonse

User · Answer

Nothing worked for me for these errors EXCEPT      was not expected       there is an error in XML document  1 2      System FormatException Input String was not in correct format       Except this way  1- You need to inspect the xml response as string  the response that you are trying to de-serialize to an object   2- Use online tools for string unescape and xml prettify formatter  3- MAKE SURE that the C  Class  main class  you are trying to map deserialize the xml string to HAS AN XmlRootAttribute that matches the root element of the response   Exmaple   My XML Response was staring like     lt ShipmentCreationResponse xmlns  http   ws aramex net ShippingAPI v1   gt          lt Transaction i nil  true  xmlns i  http   www w3 org 2001 XMLSchema-instance   gt                    And the C  class definition   attributes was like     System Diagnostics DebuggerStepThroughAttribute     System CodeDom Compiler GeneratedCodeAttribute  System ServiceModel    4 0 0 0     System ServiceModel MessageContractAttribute WrapperName  ShipmentCreationResponse   WrapperNamespace  http   ws aramex net ShippingAPI v1    IsWrapped true   public partial class ShipmentCreationResponse                   Note that the class definition does not have  XmlRootAttribute     System Xml Serialization XmlRootAttribute Namespace    http   ws aramex net ShippingAPI v1    IsNullable   false     And when i try to de serialize using a generic method    public static T Deserialize lt T gt  string input  where T   class       System Xml Serialization XmlSerializer ser   new System Xml Serialization XmlSerializer typeof T         using  System IO StringReader sr   new System IO StringReader input                 return  T ser Deserialize sr                var  Response   GeneralHelper XMLSerializer Deserialize lt ASRv2 ShipmentCreationResponse gt  xml     I was getting the errors above      was not expected      there is an error in XML document  1 2        Now by just adding the  XmlRootAttribute  that fixed the issue for ever and for every other requests responses i had a similar issue with    System Xml Serialization XmlRootAttribute Namespace    http   ws aramex net ShippingAPI v1    IsNullable   false          System SerializableAttribute     System ComponentModel DesignerCategoryAttribute  code     System Xml Serialization XmlTypeAttribute AnonymousType   true  Namespace    http   ws aramex net ShippingAPI v1      System Xml Serialization XmlRootAttribute Namespace    http   ws aramex net ShippingAPI v1    IsNullable   false   public partial class ShipmentCreationResponse

[c#] {"<user xmlns=''> was not expected.} Deserializing Twitter XML

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