htmlagilitypack Forum Rss Feed

New Post: elements not being parsed/written correctly

freakman — Fri, 20 Nov 2009 08:49:01 GMT

For some reason I have similar problem. When I parse meta tags

<meta name="keywords" content="foo" />

I actually get

<meta name="keywords" content="foo">

and its very annoying...

New Post: elements not being parsed/written correctly

goldenadam81 — Thu, 19 Nov 2009 23:26:42 GMT

This seems like a bug - just want to make sure I understand what's happening - maybe others have seen this -

When parsing an HTML document that has a link element in the head that is closed like:

<link />

It seems the parser interprets this a just an opening tag for link - and then when you write out the HtmlDocument you get:

<link>

which of course changes the meaning of the original HTML document. Has anyone seen a similar problem?

My sample code:

doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(templateContents);

StringWriter sw = new StringWriter();
doc.Save(sw);
sw.Flush();
newContents = sw.ToString();

newContents now has an HTML doc with unclosed link tag...

New Post: Error with URI

oded_r — Tue, 17 Nov 2009 10:33:56 GMT

did u used http:// ?

New Post: Ifram How Can I Capture

oded_r — Tue, 17 Nov 2009 10:31:27 GMT

i am trying to use this library and when i navigate to some site with iframes

i can not see the elements within

does some one know who can i look inside and if it possible .

thanks oded

New Post: Removing specific html tags but not the inner text.

Aminur — Mon, 16 Nov 2009 16:21:43 GMT

I know how to remove specific html nodes from a given piece of htm fragment. Eg for <p><span>Hello</hello></p> I would write the following code:

            doc.LoadHtml(html);
           HtmlNodeCollection nc = doc.DocumentNode.SelectNodes("//span");
            if (nc != null)
            {
                foreach (HtmlNode node in nc)
                {
                    node.ParentNode.RemoveChild(node);
                }
            }
            return doc.DocumentNode.WriteTo();

This removes the entire node from the doc including the text "Hello" . I want to keep the text so that my html ends up looking like <p>Hello</p>

Can this be achieved using the Html Agility Pack API or do I need to use regular expressions.

Thanks

New Post: XPath starts-with

Stargazer71 — Sat, 14 Nov 2009 18:29:59 GMT

I'm not sure if this is the reason, but it is a good place to start looking:

.NET (and by extension, HtmlAgilityPack) only support xPath 1.0, so if any of that is part of xPath 2.0, it will not work in AgilityPack

New Post: Error with URI

marc_garraway — Wed, 11 Nov 2009 15:48:07 GMT

Hi,

I am using the HAP with my asp.net website, when I run the following code I get an error

            HtmlDocument htmlDoc = new HtmlDocument();

            htmlDoc.OptionFixNestedTags = true;

            htmlDoc.Load(url);

The last time "htmlDoc.Load" throws an error "URI formats are not supported." I am doing the development work within Visual Studio 2010 Beta 2 and using the local IIS server to run the website and its using the default home page, this means my url is "http://localhost:14049/default.aspx"

Any ideas how I can fix this??

Thanks in advance

Marc

New Post: HAP with Asp.net

CarelMeyer — Wed, 11 Nov 2009 10:23:13 GMT

Hi, ran into the same problem.

Where can I get a holp of the update?

New Post: problem parsing form

reslieinovejas — Fri, 06 Nov 2009 09:37:00 GMT

Mozilla firefox highlighter add on causes the problem, try to disable the plugin and test it again

New Post: Selecting nodes from subtrees

zoidberg — Wed, 04 Nov 2009 19:28:37 GMT

i want to select nodes from a subtree:

HtmlNodeCollection nodes, nodes2;

nodes = rootNode.SelectNodes("//html");
nodes2 = nodes[0].SelectNodes("//div[1]");

why does the second call doesnt give me a node? (the document does contain divs!).

New Post: Getting Style Attributes

mesallan82 — Tue, 03 Nov 2009 11:12:41 GMT

First of all

this HAP is very useful for us to parse HTML instead of using javascript.

Im just facing one issue i can't able to retrive style attributes like border-top,top,height

For Example

I have a <span style="Border-TOP:12Px;Border-BOTTTOM:80px;TOP:490px;HEIGHT:400px"/>

How can i retreive the Border-Style etc using HAP any idea

New Post: Possible bug(s) or me just being stupid, you decide

chrisbint — Wed, 28 Oct 2009 23:47:56 GMT

A little background to my problem.

I am attempting to create a dynamic CMS system using custom tags within a html document. These tags are parsed by HAP and I then insert the information in the tags into the database for later use. This process works fine, the problem occurs when I attempt to manipulate the html at a later stage.

One of the tags I am using is a <list>. Please dont slate me for doing it this way, I needed a quick solution to demostrate something to a potential client and decided this was a good way. Anyway, the HTML will have sections like this;

Which is then in the database. The user would then come along and add 'list' items, these are made up on the admin screen on the <field>'s found in the <list>. Again the B side works fine.

Now the process needs to take these list entries and insert them into the content that was previously saved. This process is as follows;

For each list, build the content from the DB. (works fine and produces standard html)
Find the <list> tag in the doc and change the innerhtml of the node to the generated content.
Get the parent node.
Removenode using parent.removenode(child, true)

Now this is where my problems start. It removes the node, but the contents that were generated become mixed up. The generated content looks like this;

<h3> <img src="/file.aspx?id=3477"> </h3>
<table>
<tr>
<td><img src="/file.aspx?id=3478"></td>
<td><p> fsafaf </p></td>
</tr>
</table>

Which is you can see, matched the layout defined in the <list> above. However, after calling RemoveNode, it looks like this;

<table>
<tr>
<td><img src="/file.aspx?id=3478"></td>
<td><p> fsafaf </p></td>
</tr>
</table>
<h3> <img src="/file.aspx?id=3477"> </h3>

Is this something that can be explained.

My second problem was encountered by findiing my own solution to the first.

The process went like this;

For each list, build the content from the DB. (works fine and produces standard html)
Find the <list> tag in the doc and change the innerhtml to ""
Get the parent node.
Removenode using parent.removenode(child, true)
Insert generated content at n.OuterStartIndex.

Now, I have not looked at the HAP code in huge detail, but would have assumed that this would give me the startposition of <list> in the doc.

So the doc would look something like this;

Based on this, I would assume (and can see from debug) that getting the list node, and setting the innerhtml to "" would leave me with this;

<table><tr><td>
</td></tr></table>

Using the supposed outerstartindex, insert the generated HTML and I would expect this;

<table><tr><td>
<list name="sidenav" description="Side Navigation">
</list>
</td></tr></table>

Note that I have checked node.outerstartindex before and after this and they are the same.

Now remove the child using the parent;

<table width=\"192\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" class=\"sidebar\">
<tr>
    <td>
      <h3> <img src=\"/file.aspx?id=3477\"> </h3>
      <table>
        <tr>
          <td><img src=\"/file.aspx?id=3478\"></td>
          <td><p> fsafaf </p></td>
        </tr>
      </table>
      </td>
</tr>
</table>

Yet, I get this;

<table width=\"192\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" class=\"sidebar\">
<tr>
    <td></
      <h3> <img src=\"/file.aspx?id=3477\"> </h3>
      <table>
        <tr>
          <td><img src=\"/file.aspx?id=3478\"></td>
          <td><p> fsafaf </p></td>
        </tr>
      </table>
      td>
</tr>
</table>

Which appeared to me at this point to be 2 chars out. To confirm this, I added this code jsut before;

int pos = string.IndexOf("<list");

and yes, it was 2 chars difference (3345 from HAP, 3343 from IndexOf.

SO i changed my code to check myself where the pos was and it all works fine now, but is this a bug somewhere or am I mistunderstanding it.

Apologies for the long post.

Thanks

</font>

New Post: XPath starts-with

zorlack — Tue, 27 Oct 2009 17:35:18 GMT

I'm having a bit of trouble using starts-with and I'm not quite sure what I'm doing wrong.

My xPath statment is: div[starts_with(@id,'special_item')]//span[@class='specialspan']/a/@href

When I run myHtmlNode.SelectSingleNode(sPath) the object throws the following:

"Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function."

Can anyone see what I'm doing wrong?

Thanks much!

-Z

New Post: RemoveChild?

enduser — Tue, 27 Oct 2009 13:28:42 GMT

Could someone explain why this would fail? Am I thinking about it wrong? I'd like to purge a tag and all its children, but put a marker for later reference. I'm getting a System.ArgumentOutOfRangeException: Node "<div id="search"></div>" was not found in the collection error. The node is clearly being found, but maybe not during replace?

_doc.DocumentNode.ReplaceChild(
	HtmlNode.CreateNode("<!-- removed search -->"),
	_doc.DocumentNode.SelectSingleNode("//div[@id='search']")
);

New Post: Latest version

wizofaus — Tue, 27 Oct 2009 03:37:49 GMT

Attached, but good luck trying to merge it!

From: [email removed]
To: [email removed]
Date: Mon, 26 Oct 2009 18:11:04 -0700
Subject: Re: Latest version [htmlagilitypack:71700]

From: darthobiwan

Any chance you want to provide your modified codebase so I can compare it against 1.3.0 (and then 1.4.0 which changed quite a bit, resharper cleanups and field/property/method arranging). I'll look at the last one you provided and see if it has any other repercussions.

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New Post: Latest version

darthobiwan — Tue, 27 Oct 2009 00:58:22 GMT

New Post: Xpath to select attributes ending with .flv

DarthObiwan — Thu, 22 Oct 2009 13:02:56 GMT

Can't you just but an If statement in there where?

if(node.Attributes["flashvars"].Value.Contains("flv"))
{
  //Do Magic
}

New Post: Xpath to select attributes ending with .flv

zenwong — Thu, 22 Oct 2009 07:33:18 GMT

oops small correction the foreach loop should have

Console.WriteLine(node.Attributes["flashvars"].Value);

instead

New Post: Xpath to select attributes ending with .flv

zenwong — Thu, 22 Oct 2009 07:31:21 GMT

Hi Guys,

im trying to use hap to parse out embed flash movies on webpages and then view the movie on my computer full screen instead of the webpages dimensions. So far i have this code

WebClient w = new WebClient();
            string html = w.DownloadString("http://www.animeshippuuden.com/category/naruto-shippuuden/");

            HtmlDocument doc = new HtmlDocument();
            doc.LoadHtml(html);

            HtmlNodeCollection nodes = doc.DocumentNode.SelectNodes("//embed[@flashvars]");
            foreach (HtmlNode node in nodes)
            {
                Console.WriteLine(node.InnerHtml);
            }

however because theres another flash advertisement it will list 2 node for the embed tag. Is there any xpath that can select only src attributes ending with a .flv?

New Post: SelectNodes to return empty HtmlNodeCollection if no matching node is found

dizzle — Fri, 16 Oct 2009 15:02:50 GMT

I second this...