Use XPath to Select Nodes in C# | Document.Evaluate() Method Examples for XML or HTML File

readme.md

You can find more details at: Use XPath to Select Nodes using C#

Select-XML-Nodes.cs

// Create an instance of a document
using (var doc = new Aspose.Html.HTMLDocument(Path.Combine(dataDir, "cars.xml")))
{
    // Evaluate the XPath expression
    var dealers = doc.Evaluate("//Dealer[descendant::Car[descendant::Model > 2005 and descendant::Price < 25000]]", doc, doc.CreateNSResolver(doc), XPathResultType.Any, null);
    Aspose.Html.Dom.Node dealer;

    // Iterate over the resulted nodes and print their contents to the console
    while ((dealer = dealers.IterateNext()) != null)
    {
        Console.WriteLine(dealer.TextContent);
    }
}

Specific-Information-Selected-Nodes.cs

// Create an instance of a document
using (var doc = new Aspose.Html.HTMLDocument(Path.Combine(dataDir, "cars.xml")))
{
    // Select dealers that match XPath expression
    var dealers = doc.Evaluate("//Dealer[descendant::Car[descendant::Model > 2005 and descendant::Price < 25000]]", doc, doc.CreateNSResolver(doc), XPathResultType.Any, null);
    Aspose.Html.Dom.Node dealer;

    // Iterate over the selected dealers
    while ((dealer = dealers.IterateNext()) != null)
    {
        // Get and print Dealer name and Telephone
        var dealerInfo = doc.Evaluate("concat('Dealer name: ', Name, ' Telephone: ', Telephone)", dealer, doc.CreateNSResolver(doc), XPathResultType.String, null);
        Console.WriteLine(dealerInfo.StringValue);

        // Select and print CarID that match XPath expression
        var carIds = doc.Evaluate(".//Car[descendant::Model > 2005 and descendant::Price < 25000]/@CarID", dealer, doc.CreateNSResolver(doc), XPathResultType.Any, null);
        Aspose.Html.Dom.Node carId;

        while ((carId = carIds.IterateNext()) != null)
        {
            Console.WriteLine("Car id: " + carId.TextContent);
        }
    }
}

XPath-Document-Evaluate-Images-HTML.cs

// Create an instance of an HTML document
using (var doc = new Aspose.Html.HTMLDocument(Path.Combine(dataDir, "xpath.htm")))
{
    // Evaluate the XPath expression
    var result = doc.Evaluate("//main/div[position() mod 2 = 1]//img[@class = 'photo']", doc, doc.CreateNSResolver(doc), Aspose.Html.Dom.XPath.XPathResultType.Any, null);

    // Iterate over the resulted nodes and print them to the console
    Aspose.Html.Dom.Node node;
    while ((node = result.IterateNext()) != null)
    {
        var img = (Aspose.Html.HTMLImageElement)node;
        Console.WriteLine(img.Src);
    }
}