The requested resource is in use. (Exception from HRESULT: 0x800700AA)

Question

How can i solve this error " The requested resource is in use. (Exception from HRESULT: 0x800700AA)". This appear while navigating to different website using WebBrowser control in C#.net. can i know why? Thanks

Answer 1

bool go = false;
string SiteContent1 = string.Empty;
string SiteContent2 = string.Empty;
int index = 0;
WebBrowser wb = new  WebBrowser();

    void wb_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {

        try
        {
            if (go)
            {
                SiteContent2 = wb.DocumentText;
                // Code to compare to contents of the webbrowser
                index++;
                go = false;
                steps = 1;
            }

            if (!go)
                {

                    if (index >= TotalSiteCount)
                    {
                        Stop();
                    }
                    else if (steps == 1)
                    {
                        wb.Navigate(UrltocompareList[index].Url1);

                    }
                    else if (steps == 2)
                    {
                        SiteContent1 = wb.DocumentText;
                        wb.Navigate(UrltocompareList[index].Url2);
                        go = true;
                    }
                    steps++;                        
                }

        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);

        }

    }

UrltocompareList is a collection of 2 sites to compare.
TotalSiteCount is the number of items in UrltocompareList.
The form for this inherit IOleClientSite to remove media such as images, videos and no active X download to have a faster rendering time in webbrowser control.

I use this method instead of system.net.webclient to get the html of a webpage then compare them.
I got this error when it hits the wb.Navigate method.

Answer 2

try stop the current navigation (if you indeed want to stop when the page is not completed loaded) or add the navigation to a request queue and use a timer to wait IWebBrowser2::get_Busy returns false.