Form.WebBrowser - System.IO.FileNotFoundException - HRESULT: 0x80070002

Question

_{Thursday, October 28, 2010 10:04 PM}

Hi,

I am using the event "DocumentCompleted" of a WebBrowser control to read some text when the web page is loaded.

however, time to time (not always and it happens in some computers only) I get an error "System.IO.FileNotFoundException - HRESULT: 0x80070002" when I run the method:

private

void MyWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)

{

       if (MyWebBrowser.ReadyState == WebBrowserReadyState.Complete)

            if (MyWebBrowser.DocumentText.Contains("sometext")) //sometimes an error happens

            {

             // do something

            }

}

How can I prevent this problem?, for me it is strange that it happens only with some users and with some other no.

I have noticed that it depends on the Internet Exprorer Version that It is installed, the problem happens in Explorer 6, but it works in Explorer 7.

All replies (4)

_{Friday, October 29, 2010 12:30 AM}

WebBrowser.DocumentText is not documented as throwing that exception (FileNotFoundException), nor is the String.Contains function.  I have to believe the line number is not the line of that If statement.  It also seems strange to get a HRESULT 0x80070002 type of error with a .net Exception.  You are talking about the ..Net WebBrowser control found in System.Windows.Forms.WebBrowser, correct?

--
Mike

_{Friday, October 29, 2010 10:59 PM}

yeap, What I did is to use a "try - catch" block to get specific "System.IO.FileNotFoundException" and continue execution. I don't like this implementation but as you said this error is not documented, attached you will find specific exception that I got:

2010-10-28.16:37:49.55@Message=The system cannot find the file specified. (Exception from HRESULT: 0x80070002)@Source=Save@Comments=System.IO.FileNotFoundException: The system cannot find the file specified. (Exception from HRESULT: 0x80070002)
   at System.Windows.Forms.UnsafeNativeMethods.IPersistStreamInit.Save(IStream pstm, Boolean fClearDirty)
   at System.Windows.Forms.WebBrowser.get_DocumentStream()
   at System.Windows.Forms.WebBrowser.get_DocumentText()
   at iAgent.FrmLoadSAPHrs.webBrowserBoschCheckers_DocumentCompleted(Object sender, WebBrowserDocumentCompletedEventArgs e) in C:\Documents and Settings\lze1tl\My Documents\MyProject\iAgent\FrmLoadSAPHrs.cs:line 190

It is strange that this happen only when the user uses explorer 6, because exprorer 7 is working without errors.

_{Friday, October 29, 2010 11:33 PM}

I found a link, but forgot to copy it down (sorry) that said to give the webbrowser control focus before calling DocumentText.  See if that helps you.  (that is, try calling MyWebBrowser.Focus();)

--
Mike

_{Sunday, December 5, 2010 11:59 PM}

I ran into same issue and fixed it by not calling documenttext instead i called document.body.outerhtml.contains("something")

If WebBrowser1.ReadyState = WebBrowserReadyState.Complete Or WebBrowser1.ReadyState = WebBrowserReadyState.Interactive Then
'This was just to make a call to webbrowser document
Dim doc As HtmlDocument = WebBrowser1.Document

    If WebBrowser1.Document.Body.OuterHtml.Contains("something") Then


        'do some work

    end if

end if