how to convert Htmlnode of HtmlAgilityPack to webbrowser HtmlElement

c# html-agility-pack

Question

I was creating a application that automatically inserts data into html input tags. I have xPath for specific tag like '/html/body/form/div/div[2]/div/div/input' and I managed to get HtmlNode with the help of HtmlAgilityPack

var documentAsIHtmlDocument3 = (mshtml.IHTMLDocument3)webBrowser.Document.DomDocument;
StringReader sr = new StringReader(documentAsIHtmlDocument3.documentElement.outerHTML);
htmlDocument.Load(sr);
    if (htmlDocument.DocumentNode != null)
    {
        HtmlNode currentNode = htmlDocument.DocumentNode.SelectSingleNode(xPath);
    }

Now i need to somehow select HtmlElement from Webbrowser.Document which corresponds to current HtmlNode . Can somebody help me with that?

BTW: I am not creating any spamming bot.

Hi everyone again. I found solution with recursion, lots of if statements and no htmlagilitypack, but unfortunately i can't post it right now. It seems that i don't have enough reputation.

Still, if it doesn't make too much effort, can you please tell me how to solve this problem with htmlagilitypack, because my code seems really nasty.

1
2
2/27/2013 8:35:02 PM

Popular Answer

Thank you everyone. After thinking and programming for a almost whole day, I came to decision that i have to use native htmlElement instead of htmlagilitypack HtmlNode, because I want to input text into Htmlelement in webbrowser . so here is the code that i came up with. still i would appreciate if someone shows a solution with htmlagilitypack.

    public HtmlElement selectHtmlNode(string xPath, HtmlElement htmlElement)
    {
        string currentNode;
        int indexOfElement;

        //get string representation of current Tag.
        if (xPath.Substring(1,xPath.Length-2).Contains('/'))
            currentNode = xPath.Substring(1, xPath.IndexOf('/', 1) - 1);
        else
            currentNode = xPath.Substring(1, xPath.Length-1);
        //gets the depth of current xPath
        int numOfOccurence = Regex.Matches(xPath, "/").Count;

        //gets the children's index
        int.TryParse(Regex.Match(currentNode, @"\d+").Value, out indexOfElement);

        //if i have to select nth-child ex: /tr[4]
        if (indexOfElement > 1)
        {
            currentNode = currentNode.Substring(0, xPath.IndexOf('[') - 1);
            //the tag that i want to get
            if (numOfOccurence == 1 || numOfOccurence == 0)
            {
                return htmlElement.Children[indexOfElement - 1];
            }
            //still has some children tags
            if (numOfOccurence > 1)
            {
                int i = 1;
                //select nth-child
                foreach (HtmlElement tempElement in htmlElement.Children)
                {
                    if (tempElement.TagName.ToLower() == currentNode && i == indexOfElement)
                    {
                        return selectHtmlNode(xPath.Substring(xPath.IndexOf('/', 1)), tempElement);
                    }
                    else if (tempElement.TagName.ToLower() == currentNode && i < indexOfElement)
                    {
                        i++;
                    }
                }
            }
        }
        else
        {
            if (numOfOccurence == 1 || numOfOccurence == 0)
            {
                return htmlElement.FirstChild;
            }
            if (numOfOccurence > 1)
            {
                foreach (HtmlElement tempElement in htmlElement.Children)
                {
                    if (tempElement.TagName.ToLower() == currentNode)
                    {
                        return selectHtmlNode(xPath.Substring(xPath.IndexOf('/', 1)), tempElement);
                    }
                }
            }
        }
        return null;
    }

function is called in this way. where htmlController is instance of some class.

HtmlElement currentElement = htmlController.selectHtmlNode("/body/form/div/div[2]/div/div/input", webBrowser.Document.GetElementsByTagName("html")[0]);
currentElement.SetAttribute("Value", "hello world");
1
6/11/2012 4:08:06 AM


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