I need to succesfully validate my xml file against xsd schema in C#

Question

when i run the code after adding both xml and xsd schema file i get the error as "ID" attribute not declared,The element 'Student' has invalid child element 'Student'. Validation failed below is my code:

 <?xml version="1.0" encoding="utf-8" standalone="yes"?> <Students> <Student ID="101"> <Name>kamal</Name> <Gender>Male</Gender> <Marks>800</Marks> </Student> <Student ID="102"> <Name>Sapna</Name> <Gender>Female</Gender> <Marks>900</Marks> </Student> <Student ID="103"> <Name>Raju</Name> <Gender>Male</Gender> <Marks>870</Marks> <Student ID="104"> <Name>Sushant</Name> <Gender>Male</Gender> <Marks>700</Marks> </Student> </Student> </Students> 

 <?xml version="1.0" encoding="utf-8" ?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <xsd:element name="Students"> <xsd:complexType> <xsd:sequence> <xsd:element name="Student" minOccurs="1" maxOccurs="4"> <xsd:complexType> <xsd:sequence> <xsd:element name="Name" minOccurs="1" maxOccurs="1"/> <xsd:element name="Gender" minOccurs="1" maxOccurs="1"/> <xsd:element name="Marks" minOccurs="1" maxOccurs="1"/> </xsd:sequence> </xsd:complexType> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:element> </xsd:schema> 

And finally the code file:

 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Xml.Linq; using System.Xml.Schema; namespace ClassLibrary1 { class Class16 { public static void Main() { XmlSchemaSet ss = new XmlSchemaSet(); ss.Add("", @"C:\\Users\\admin\\documents\\visual studio 2013\\Projects\\ClassLibrary1\\ClassLibrary1\\Students.xsd"); XDocument doc = XDocument.Load(@"C:\\Users\\admin\\documents\\visual studio 2013\\Projects\\ClassLibrary1\\ClassLibrary1\\sample1.xml"); bool validationerror = false; doc.Validate(ss,(s,e)=> { Console.WriteLine(e.Message); validationerror = true; }); if(validationerror) { Console.WriteLine("Validation failed"); Console.ReadLine(); } else { Console.WriteLine("Validation succeded"); Console.ReadLine(); } } } } 

Answer 1

you have to change in both XSD as well as in you sample.xml. For your reference Please find below correct XSD and xml files.

Correct Sample:

        <?xml version="1.0" encoding="utf-8" standalone="yes"?>
        <Students>
          <Student ID="101">
            <Name>kamal</Name>
            <Gender>Male</Gender>
            <Marks>800</Marks>
          </Student>
          <Student ID="102">
            <Name>Sapna</Name>
            <Gender>Female</Gender>
            <Marks>900</Marks>
          </Student>
          <Student ID="103">
            <Name>Raju</Name>
            <Gender>Male</Gender>
            <Marks>870</Marks>
            </Student>
            <Student ID="104">
              <Name>Sushant</Name>
              <Gender>Male</Gender>
              <Marks>700</Marks>
            </Student>
        </Students>

Correct XSD:

<?xml version="1.0" encoding="utf-8" ?>
        <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
          <xsd:element name="Students">
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element name="Student" minOccurs="1" maxOccurs="4">
                  <xsd:complexType>     
                    <xsd:sequence>
                      <xsd:element name="Name" minOccurs="1" maxOccurs="1"/>
                      <xsd:element name="Gender" minOccurs="1" maxOccurs="1"/>
                      <xsd:element name="Marks" minOccurs="1" maxOccurs="1"/>
                    </xsd:sequence>
                    <xsd:attribute name="ID" type="xsd:string" use="required" />
                  </xsd:complexType>
                </xsd:element>
              </xsd:sequence>
            </xsd:complexType>
          </xsd:element>
        </xsd:schema>