Error get data in webbrowser

Question

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have a form and one webbrowser now I want to retrieve data displayed on the webbrowser must do?

Div Tags:

HTML

<div id="divTop" >
  <div id="text-conent"
       style="width: 500px;
              float: right;" >
  </div>
  <div id="grid"
       style="margin-removed 505px;
              height: 700px;" >
  </div>
</div>

Code get data from webbrowser:

C#

HtmlAgilityPack.HtmlDocument doc;
string                       texts

doc = ( HtmlAgilityPack.HtmlDocument ) webBrowser1.
                                       Document.
                                       DomDocument;
texts = doc.DocumentNode.SelectSingleNode (
            "//div[@class='text-conent']/p]").InnerText;
richTextBox1.Text = texts;

Error:
Unable to cast COM object of type 'mshtml.HTMLDocumentClass' to class type 'HtmlAgilityPack.HtmlDocument'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID

I have to how to get the data in the correct webbrowser

Posted 21-Jun-15 16:24pm

Member 11530690

Updated 22-Jun-15 5:21am

gggustafson

v3

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Comments

Richard Deeming 22-Jun-15 12:13pm

Further to gggustafson's answer, your example HTML has a <div> tag with an id of "text-conent", but your code is looking for a tag with a class of "text-conent". Your XPath query won't match any nodes until you fix it.

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gggustafson · Answer 1 · 2015-06-22T05:43:00

HtmlAgilityPack.HtmlDocument is not compatible with mshtml.HTMLDocumentClass. Somewhere in your code, you probably point webBrowser1 to a file from which you want to extract the inner text of the div "text-conent" (are you sure of the spelling?).

I'd suggest that you follow the process that I used in SiteMapper Tool[^]

C#

HAP.HtmlDocument  web_page = new HAP.HtmlDocument ( );

try
    {
    WebRequest  web_request;
    WebResponse web_response;

    web_request = WebRequest.Create ( uri.AbsoluteUri );
    web_response = web_request.GetResponse ( );

    using ( Stream stream = web_response.
                            GetResponseStream ( ) )
        {
        web_page.Load ( stream );
        }
    }
catch ( WebException we )
    {
    node.Broken = true;
    continue;
    }

Simply use the HtmlAgilityPack Load method. I suggest that you never use the mshtml.HTMLDocumentClass.

Once that you have the HTML in web_page, you can extract the div inner text as you are currently doing.