CSharp - Use LINQ to restrict the sequence of XML nodes to get comment only

Description

Use LINQ to restrict the sequence of XML nodes to get comment only

Demo

using System;
using System.Linq;
using System.Xml.Linq;
using System.Collections.Generic;

class Program/*from  w  w  w . j a  v  a  2  s .  c o m*/
{
    static void Main(string[] args){
            XElement firstParticipant;
            
            //  A full document with all the bells and whistles.
            XDocument xDocument = new XDocument(
              new XDeclaration("1.0", "UTF-8", "yes"),
              new XDocumentType("Books", null, "Books.dtd", null),
              new XProcessingInstruction("BookCataloger", "out-of-print"),
              //  Notice on the next line that we are saving off a reference to the first
              //  Book element.
              new XElement("Books", firstParticipant =
                new XElement("Book",
                  new XComment("This is a new author."),
                  new XProcessingInstruction("AuthorHandler", "new"),
                  new XAttribute("type", "Author"),
                  new XElement("FirstName", "Joe"),
                  new XElement("LastName", "Ruby")),
                new XElement("Book",
                  new XAttribute("type", "Editor"),
                  new XElement("FirstName", "PHP"),
                  new XElement("LastName", "Python"))));
            
            foreach (XNode node in firstParticipant.Nodes().OfType<XComment>())
            {
              Console.WriteLine(node);
            }
    }
}

Result

Related Topic

• Creating Elements with XElement
• Creating XElement from String value
• Creating XML Tree via XElement
• Creating XElement from LINQ statement
• Creating an Element and Assigning a String As Its Value
• Cast XElement to String
• Cast XElement to the Node Value's Type
• Cast a Node to a Different Data Type Than Its Value's Original Data Type
• Cast to a Bool Calls the System.Xml.XmlConvert.ToBoolean Method
• Use ToString Method on an Element to get XML Tree in String
• Creating a Text Node and Passing It As the Value of a Created Element
• Using Functional Construction to Create an XML
• Generating an XML Tree with a LINQ Query
• Deferred Execution of the XML Tree Construction by Using the XStreamingElement Class
• Accessing Named Child Elements Using the Elements Method
• Accessing the First Child Element with a Specified Name
• Using ReplaceAll to Change an Element's Subtree
• Accessing an Element's Child Elements Using the Elements Method
• Using the OfType Operator to Return Just the Elements
• Adding a Node to the End of the Specified Node's Child Nodes with Add
• Adding a Node to the Beginning of the Specified Node's Child Nodes with AddFirst
• Adding a Node in the Specified Node's Child Nodes with AddBeforeSelf
• Adding a Node in a Specific Location of the Specified Node's Child Nodes with AddAfterSelf
• Deleting a Specific Node with Remove
• Deleting a Sequence of Nodes with Remove
• Removing a Node's Content with RemoveAll
• Updating a Node's Value
• Using SetElementValue to Update, Add, and Delete Child Elements
• Add annotations based on their type attribute
• Enumerate through the elements and retrieve the element's annotation:

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