c# - Deserializing XML into object returns null values -

i trying deserialize xml document code using returning null value each time.

i have xml this

<?xml version="1.0" encoding="utf-8"?> <registrationopendata xmlns:i="http://www.w3.org/2001/xmlschema-instance" xmlns="http://example.gov"> <description>registration data collected abc xyz</description> <informationurl>http://www.example.com/html/hpd/property-reg-unit.shtml</informationurl> <sourceagency>abc department of housing</sourceagency> <sourcesystem>premisys</sourcesystem> <startdate>2016-02-29t00:03:06.642772-05:00</startdate> <enddate i:nil="true" /> <registrations> <registration xmlns:i="http://www.w3.org/2001/xmlschema-instance"> <registrationid>108260</registrationid> <buildingid>4731</buildingid> </registration> </registrations> </registrationopendata> 

to deserialize it, have created class

using system.xml.serialization; using system.xml; [system.codedom.compiler.generatedcodeattribute("xsd", "4.0.30319.1")] [system.serializableattribute()] [system.diagnostics.debuggerstepthroughattribute()] [system.componentmodel.designercategoryattribute("code")] [system.xml.serialization.xmltypeattribute(namespace="http://example.gov")] [system.xml.serialization.xmlrootattribute(namespace="http://example.gov", isnullable=true)] public partial class registration : infoclass {    private long registrationidfield;   private bool registrationidfieldspecified;   private system.nullable<long> buildingidfield;   private bool buildingidfieldspecified;    public long registrationid  {         {         return this.registrationidfield;     }     set     {         this.registrationidfield = value;     } } [system.xml.serialization.xmlignoreattribute()] public bool registrationidspecified {     {         return this.registrationidfieldspecified;     }     set {         this.registrationidfieldspecified = value;     } }  [system.xml.serialization.xmlelementattribute(isnullable=true)] public system.nullable<long> buildingid {     {         return this.buildingidfield;     }     set {         this.buildingidfield = value;     } }  [system.xml.serialization.xmlignoreattribute()] public bool buildingidspecified {     {         return this.buildingidfieldspecified;     }     set {         this.buildingidfieldspecified = value;     } } 

and code using is

public void test()     {          registration registrationval = null;         var xroot = new xmlrootattribute();         xroot.elementname = "registrationopendata";         xroot.namespace = "http://services.hpd.gov";         xroot.isnullable = true;         var serializer = new xmlserializer(typeof(registration), xroot);         using (textreader reader = new streamreader(@"d:\sample.xml"))             {                 registrationval = (registration)serializer.deserialize(reader);             } } 

here returning null value. in advance help.

your problem in xml because has list of registrations. if remove <registration> , <registrations> tag works. need registration , registrations because in case have work lists.

you in example (deserializing nested xml c# objects)

and create own class registrations hold list of registration elements.

with code works. create super class:

[xmlroot("registrationopendata")] public class registrationopendata {     [xmlelement("registrations")]     public registrations regs { get; set; } } 

and registrations:

[xmlroot("registrations")] public class registrations {     [xmlelement("registration")]     public list<registration> regs { get; set; } } 

and registration should same before. main function should change this:

static void main(string[] args) {         registrationopendata registrationval = null;         var xroot = new xmlrootattribute();         xroot.elementname = "registrationopendata";         xroot.namespace = "http://services.hpd.gov";         xroot.isnullable = true;         var serializer = new xmlserializer(typeof(registrationopendata), xroot);         using (textreader reader = new streamreader(@"d:\sample.xml"))         {             registrationval = (registrationopendata)serializer.deserialize(reader);         } }