How do I create a new HTML document from scratch with Html Agility Pack?

To create a new HTML document from scratch using the Html Agility Pack in C#, you need to instantiate a new HtmlDocument object and then use its methods and properties to build the HTML content.

Here's a step-by-step guide to create a simple HTML document with Html Agility Pack:

Install the Html Agility Pack package by running the following command in the Package Manager Console in Visual Studio:

Install-Package HtmlAgilityPack

In your C# code, import the Html Agility Pack namespace:

using HtmlAgilityPack;

Create a new instance of HtmlDocument:

var htmlDoc = new HtmlDocument();

Create the structure of your HTML document. For example, let's create a document with a DOCTYPE declaration, an html element, head with a title, and a body with an h1 element:

// Create the DOCTYPE declaration
HtmlDocumentType doctype = htmlDoc.CreateDocumentType("html", null, null, null);
htmlDoc.DocumentNode.AppendChild(doctype);

// Create the root <html> element
HtmlNode htmlNode = htmlDoc.CreateElement("html");
htmlDoc.DocumentNode.AppendChild(htmlNode);

// Create the <head> element with a <title>
HtmlNode headNode = htmlDoc.CreateElement("head");
htmlNode.AppendChild(headNode);

HtmlNode titleNode = htmlDoc.CreateElement("title");
titleNode.AppendChild(htmlDoc.CreateTextNode("My New HTML Document"));
headNode.AppendChild(titleNode);

// Create the <body> element with an <h1>
HtmlNode bodyNode = htmlDoc.CreateElement("body");
htmlNode.AppendChild(bodyNode);

HtmlNode h1Node = htmlDoc.CreateElement("h1");
h1Node.AppendChild(htmlDoc.CreateTextNode("Hello, World!"));
bodyNode.AppendChild(h1Node);

Save the document to a file or retrieve its string representation:

To save to a file:

htmlDoc.Save("newHtmlDocument.html");

To get the HTML as a string:

string htmlString = htmlDoc.DocumentNode.OuterHtml;

Here is the complete code snippet:

using System;
using HtmlAgilityPack;

namespace HtmlAgilityPackExample
{
    class Program
    {
        static void Main(string[] args)
        {
            var htmlDoc = new HtmlDocument();

            // Create the DOCTYPE declaration
            HtmlDocumentType doctype = htmlDoc.CreateDocumentType("html", null, null, null);
            htmlDoc.DocumentNode.AppendChild(doctype);

            // Create the root <html> element
            HtmlNode htmlNode = htmlDoc.CreateElement("html");
            htmlDoc.DocumentNode.AppendChild(htmlNode);

            // Create the <head> element with a <title>
            HtmlNode headNode = htmlDoc.CreateElement("head");
            htmlNode.AppendChild(headNode);

            HtmlNode titleNode = htmlDoc.CreateElement("title");
            titleNode.AppendChild(htmlDoc.CreateTextNode("My New HTML Document"));
            headNode.AppendChild(titleNode);

            // Create the <body> element with an <h1>
            HtmlNode bodyNode = htmlDoc.CreateElement("body");
            htmlNode.AppendChild(bodyNode);

            HtmlNode h1Node = htmlDoc.CreateElement("h1");
            h1Node.AppendChild(htmlDoc.CreateTextNode("Hello, World!"));
            bodyNode.AppendChild(h1Node);

            // Save the document to a file
            htmlDoc.Save("newHtmlDocument.html");

            // Or get the HTML as a string
            string htmlString = htmlDoc.DocumentNode.OuterHtml;
            Console.WriteLine(htmlString);
        }
    }
}

This code will generate an HTML document with the following content:

<!DOCTYPE html>
<html>
<head>
<title>My New HTML Document</title>
</head>
<body>
<h1>Hello, World!</h1>
</body>
</html>

Remember to handle exceptions and edge cases as required for your specific use case.

How do I create a new HTML document from scratch with Html Agility Pack?

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