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Part 8 XML validation against XSD

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In this video, we will discuss validating an XML file against an XSD (XML Schema Definition Language) file.

Text version of the video

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What is an XSD file
An XSD ( XML Schema Definition Language) file defines the structure of the XML file, i.e which elements in which order, how many times, with which attributes, how they are nested, etc. Without an XSD, an XML file is a relatively free set of elements and attributes.

Steps to validate an XML file using XSD file.

Step 1 : Create a new Console application. Name it Demo.

Step 2 : Add a new XML Schema file to the project. Name it Student.xsd. Copy and paste the following XML.
[?xml version=”1.0″ encoding=”utf-8″?] [xsd:schema xmlns:xsd=”
[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=”TotalMarks” minOccurs=”1″ maxOccurs=”1″/] [/xsd:sequence] [/xsd:complexType] [/xsd:element] [/xsd:sequence] [/xsd:complexType] [/xsd:element] [/xsd:schema]

The above XSD specifies that
1. The root element must be Students
2. Students root element should contain atleast 1 Student element. More than 4 Student elements are not allowed.
3. Each Student element should contain the following 3 elements in the order specified.
i) Name
ii) Gender
iii) TotalMarks

Step 3: Add a new XML file to the project. Name it Data.xml. Copy and paste the following XML.
[?xml version=”1.0″ encoding=”utf-8″ standalone=”yes”?] [Students] [Student] [Name]Mark[/Name] [Gender]Male[/Gender] [TotalMarks]800[/TotalMarks] [/Student] [Student] [Name]Rosy[/Name] [Gender]Female[/Gender] [TotalMarks]900[/TotalMarks] [/Student] [Student] [Name]Pam[/Name] [Gender]Female[/Gender] [TotalMarks]850[/TotalMarks] [/Student] [Student] [Name]John[/Name] [Gender]Male[/Gender] [TotalMarks]950[/TotalMarks] [/Student] [/Students]

Step 4 : To validate Data.xml again Student.xsd file, copy and paste the following code in the Main() method.
XmlSchemaSet schema = new XmlSchemaSet();
schema.Add(“”, @”C:DemoDemoStudent.xsd”);

XDocument xmlDocument = XDocument.Load(@”C:DemoDemoData.xml”);
bool validationErrors = false;

xmlDocument.Validate(schema, (s, e) =] Console.WriteLine(e.Message);
validationErrors = true;
);

if (validationErrors)

Console.WriteLine(“Validation failed”);

else

Console.WriteLine(“Validation succeeded”);

Note: Please include the following namespaces
using System;
using System.Linq;
using System.Xml.Linq;
using System.Xml.Schema;

Step 5 : Run the application. Since the XML in Data.xml confirms to the XSD file, we get the message Validation succeeded.

Step 6 : Remove [Name] element from one of the [student] elements in Data.xml file. Run the application again. Notice that the validation fails and we get the following error.
The element ‘Student’ has invalid child element ‘TotalMarks’. List of possible elements expected: ‘Gender’.
Validation failed ..

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Image related to subject Part 8 XML validation against XSD

Part 8 XML validation against XSD

Information related to the subject Part 8 XML validation against XSD.

In this video, we will discuss validating an XML file against an XSD (XML Schema Definition Language) file.

Text version of the video

Healthy diet is very important both for the body and mind. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking our YouTube channel. Hope you can help.

Slides

LINQ to SQL Tutorial – All Text Articles & Slides

LINQ to XML Tutorial Playlist

Dot Net, SQL, Angular, JavaScript, jQuery and Bootstrap complete courses

What is an XSD file
An XSD ( XML Schema Definition Language) file defines the structure of the XML file, i.e which elements in which order, how many times, with which attributes, how they are nested, etc. Without an XSD, an XML file is a relatively free set of elements and attributes.

Steps to validate an XML file using XSD file.

Step 1 : Create a new Console application. Name it Demo.

Step 2 : Add a new XML Schema file to the project. Name it Student.xsd. Copy and paste the following XML.
[?xml version=”1.0″ encoding=”utf-8″?] [xsd:schema xmlns:xsd=”
[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=”TotalMarks” minOccurs=”1″ maxOccurs=”1″/] [/xsd:sequence] [/xsd:complexType] [/xsd:element] [/xsd:sequence] [/xsd:complexType] [/xsd:element] [/xsd:schema]

The above XSD specifies that
1. The root element must be Students
2. Students root element should contain atleast 1 Student element. More than 4 Student elements are not allowed.
3. Each Student element should contain the following 3 elements in the order specified.
i) Name
ii) Gender
iii) TotalMarks

Step 3: Add a new XML file to the project. Name it Data.xml. Copy and paste the following XML.
[?xml version=”1.0″ encoding=”utf-8″ standalone=”yes”?] [Students] [Student] [Name]Mark[/Name] [Gender]Male[/Gender] [TotalMarks]800[/TotalMarks] [/Student] [Student] [Name]Rosy[/Name] [Gender]Female[/Gender] [TotalMarks]900[/TotalMarks] [/Student] [Student] [Name]Pam[/Name] [Gender]Female[/Gender] [TotalMarks]850[/TotalMarks] [/Student] [Student] [Name]John[/Name] [Gender]Male[/Gender] [TotalMarks]950[/TotalMarks] [/Student] [/Students]

Step 4 : To validate Data.xml again Student.xsd file, copy and paste the following code in the Main() method.
XmlSchemaSet schema = new XmlSchemaSet();
schema.Add(“”, @”C:DemoDemoStudent.xsd”);

XDocument xmlDocument = XDocument.Load(@”C:DemoDemoData.xml”);
bool validationErrors = false;

xmlDocument.Validate(schema, (s, e) =] Console.WriteLine(e.Message);
validationErrors = true;
);

if (validationErrors)

Console.WriteLine(“Validation failed”);

else

Console.WriteLine(“Validation succeeded”);

Note: Please include the following namespaces
using System;
using System.Linq;
using System.Xml.Linq;
using System.Xml.Schema;

Step 5 : Run the application. Since the XML in Data.xml confirms to the XSD file, we get the message Validation succeeded.

Step 6 : Remove [Name] element from one of the [student] elements in Data.xml file. Run the application again. Notice that the validation fails and we get the following error.
The element ‘Student’ has invalid child element ‘TotalMarks’. List of possible elements expected: ‘Gender’.
Validation failed ..

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25 Comement tại “Part 8 XML validation against XSD | Website offers tips”

  1. Thanks Venkat for the code..you explained it clearly and neatly..

  2. How can we define or handle following XML against XSD.?
    《Students》
    《Student Name="sunil" rollno=12》
    《Student Name="Ram" rollno=13》
    《/Students》

  3. You are so good. Thanks teacher.

  4. my xsd is on a path(uri) which has res:// as a prefix. for example res://path/file.xsd. How to add this schema in XmlSchemaSet. I tried every option but it says , URI prefix in not recognized. If anyone can help. Link of the stackover question: https://stackoverflow.com/questions/59071603/xmlreadersettings-schemas-add-the-uri-prefix-is-not-recognized

  5. thanks, nice tutorial

  6. Hi thx for the tutorial but I have a little question.
    When I do <xs:element name="cc">
    </xs:element> on my xsd file to test <cc >
    </cc> on my xml file to validate, IT WORKS.
    but it doesn't work with <cc th:if="${cc != null and cc != ''}">
    </cc> .
    Do you have any Idea please ??

  7. see i was trying this program acctually ,the problem is the validationserrors bool variable it can not set as true inside lambda .its showed as false .but you showed output correctly.

  8. Can we validate some portion of XML file with xsd?

  9. Thank you. I like the fact that you use the same, or similar, simple example in all 8 videos to show the different LINQ xml functions. Clear and easy to follow.

  10. How to false to true?

  11. Сергей Дяченко 2021-02-18 lúc 10:42 chiều

    great! thank you!

  12. Very helpful series!

  13. Thank you as always!

  14. Thanksss

  15. You're voice sounds familiar. Have you worked as voice-over / narrator on IT training materials?

  16. Thank you Venkat.

  17. Thank you. Upload videos on WPF

  18. Excellent work video can the XSD have rules that specify an element is required? Thanks

  19. Plz Plz Plz Plz Plz upload videos on WPF 

  20. Sir, can you record a video on XML Encryption in LINQ to XML?

  21. Thank you sir for uploading this.

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