{"<user xmlns=''> no era lo esperado.} Deserializar Twitter XML
Estoy obteniendo el XML de Twitter a través de OAuth.
Estoy realizando una solicitud a http://twitter.com/account/verify_credentials.xml , que devuelve el siguiente XML:
<?xml version="1.0" encoding="UTF-8"?>
<user>
<id>16434938</id>
<name>Lloyd Sparkes</name>
<screen_name>lloydsparkes</screen_name>
<location>Hockley, Essex, UK</location>
<description>Student</description>
<profile_image_url>http://a3.twimg.com/profile_images/351849613/twitterProfilePhoto_normal.jpg</profile_image_url>
<url>http://www.lloydsparkes.co.uk</url>
<protected>false</protected>
<followers_count>115</followers_count>
<profile_background_color>9fdaf4</profile_background_color>
<profile_text_color>000000</profile_text_color>
<profile_link_color>220f7b</profile_link_color>
<profile_sidebar_fill_color>FFF7CC</profile_sidebar_fill_color>
<profile_sidebar_border_color>F2E195</profile_sidebar_border_color>
<friends_count>87</friends_count>
<created_at>Wed Sep 24 14:26:09 +0000 2008</created_at>
<favourites_count>0</favourites_count>
<utc_offset>0</utc_offset>
<time_zone>London</time_zone>
<profile_background_image_url>http://s.twimg.com/a/1255366924/images/themes/theme12/bg.gif</profile_background_image_url>
<profile_background_tile>false</profile_background_tile>
<statuses_count>1965</statuses_count>
<notifications>false</notifications>
<geo_enabled>false</geo_enabled>
<verified>false</verified>
<following>false</following>
<status>
<created_at>Mon Oct 12 19:23:47 +0000 2009</created_at>
<id>4815268670</id>
<text>» @alexmuller your kidding? it should all be "black tie" dress code</text>
<source><a href="http://code.google.com/p/wittytwitter/" rel="nofollow">Witty</a></source>
<truncated>false</truncated>
<in_reply_to_status_id>4815131457</in_reply_to_status_id>
<in_reply_to_user_id>8645442</in_reply_to_user_id>
<favorited>false</favorited>
<in_reply_to_screen_name>alexmuller</in_reply_to_screen_name>
<geo/>
</status>
</user>
Estoy usando el siguiente código para deserializar:
public User VerifyCredentials()
{
string url = "http://twitter.com/account/verify_credentials.xml";
string xml = _oauth.oAuthWebRequestAsString(oAuthTwitter.Method.GET, url, null);
XmlSerializer xs = new XmlSerializer(typeof(User),"");
MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(xml));
return (User)xs.Deserialize(ms);
}
Y tengo lo siguiente para mi User
clase:
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true)]
public partial class User
{
[XmlElement(ElementName = "id")]
public long Id { get; set; }
[XmlElement(ElementName = "name")]
public string Name { get; set; }
[XmlElement(ElementName = "screen_name")]
public string ScreenName { get; set; }
[XmlElement(ElementName = "location")]
public string Location { get; set; }
[XmlElement(ElementName = "description")]
public string Description { get; set; }
[XmlElement(ElementName = "profile_image_url")]
public string ProfileImageUrl { get; set; }
[XmlElement(ElementName = "url")]
public string Url { get; set; }
[XmlElement(ElementName = "protected")]
public bool Protected { get; set; }
[XmlElement(ElementName = "followers_count")]
public int FollowerCount { get; set; }
[XmlElement(ElementName = "profile_background_color")]
public string ProfileBackgroundColor { get; set; }
[XmlElement(ElementName = "profile_text_color")]
public string ProfileTextColor { get; set; }
[XmlElement(ElementName = "profile_link_color")]
public string ProfileLinkColor { get; set; }
[XmlElement(ElementName = "profile_sidebar_fill_color")]
public string ProfileSidebarFillColor { get; set; }
[XmlElement(ElementName = "profile_sidebar_border_color")]
public string ProfileSidebarBorderColor { get; set; }
[XmlElement(ElementName = "friends_count")]
public int FriendsCount { get; set; }
[XmlElement(ElementName = "created_at")]
public string CreatedAt { get; set; }
[XmlElement(ElementName = "favourties_count")]
public int FavouritesCount { get; set; }
[XmlElement(ElementName = "utc_offset")]
public int UtcOffset { get; set; }
[XmlElement(ElementName = "time_zone")]
public string Timezone { get; set; }
[XmlElement(ElementName = "profile_background_image_url")]
public string ProfileBackgroundImageUrl { get; set; }
[XmlElement(ElementName = "profile_background_tile")]
public bool ProfileBackgroundTile { get; set; }
[XmlElement(ElementName = "statuese_count")]
public int StatusesCount { get; set; }
[XmlElement(ElementName = "notifications")]
public string Notifications { get; set; }
[XmlElement(ElementName = "geo_enabled")]
public bool GeoEnabled { get; set; }
[XmlElement(ElementName = "Verified")]
public bool Verified { get; set; }
[XmlElement(ElementName = "following")]
public string Following { get; set; }
[XmlElement(ElementName = "status", IsNullable=true)]
public Status CurrentStatus { get; set; }
}
Pero cuando se deserializa el XML anterior, la aplicación arroja lo siguiente:
$excepción {"Hay un error en el documento XML (2, 2)".} System.Exception {System.InvalidOperationException}
InnerException {"<user xmlns=''> no se esperaba."} System.Exception {System.InvalidOperationException}
Ahora he buscado y la mejor solución que puedo encontrar es agregar espacios de nombres en blanco al serializador cuando serializas el contenido, pero no lo estoy serializando, así que no puedo.
También tengo un código para recibir Estados, que funciona bien.
Entonces, ¿alguien puede explicarme por qué ocurre el error? ¿Además de una posible solución?
Decore su entidad raíz con el atributo XmlRoot que se utilizará en el momento de la compilación.
[XmlRoot(Namespace = "www.contoso.com", ElementName = "MyGroupName", DataType = "string", IsNullable=true)]
O especifique el atributo raíz al deserializar en tiempo de ejecución.
XmlRootAttribute xRoot = new XmlRootAttribute();
xRoot.ElementName = "user";
// xRoot.Namespace = "http://www.cpandl.com";
xRoot.IsNullable = true;
XmlSerializer xs = new XmlSerializer(typeof(User),xRoot);
Aún más fácil es simplemente agregar las siguientes anotaciones al principio de su clase:
[Serializable, XmlRoot("user")]
public partial class User
{
}
XmlSerializer xs = new XmlSerializer(typeof(User), new XmlRootAttribute("yourRootName"));