Help: When dozens of WebBrowser are opened at the same time, the show method is not displayed but it is automatically di

huangyan1123

When opening dozens of WebBrowser at the same time, they did not call their show () method. Why sometimes WebBrowser automatically displays WebBrowser when it fails to open a web page, and sometimes it does not?

Called code:
for (int j = pageStartNum; j <pageStartNum + loopCount; j ++)
{
HTMLAnalysis htmAnalysis = new HTMLAnalysis ();
              string url = websiteURL + "&" + subURL + "=" + currIndustryCode + "&" + paginationFalg + "=" + j;
              htmAnalysis.startProcess (url);
              htmAnalysis = null;
             Thread.Sleep (500);
}

class HTMLAnalysis code:
            try
            {
                Uri uri = new Uri (url);
                page.ScriptErrorsSuppressed = true;
                page.Navigate (uri);
                page.Left = -page.Width;
                page.DocumentCompleted + = new WebBrowserDocumentCompletedEventHandler (Process);
            }
            catch (Exception ex)
            {
                DisplayMessage (ex.ToString ());
            }

private void Process (object sender, WebBrowserDocumentCompletedEventArgs e)
        {
                if (page.ReadyState == WebBrowserReadyState.Complete)
                {
                    try
                   {
                   ******************
                   }
                   catch (Exception ex)
                   {
                    HTMLAnalysis.failCount ++;
                    MessageBox.Show (ex.Message);
                  }
                  finally
                  {
                    page.Controls.Clear ();
                    page.Dispose ();
                    page = null;
                }
            }

Is it a problem with dispose (), has anyone encountered this situation?

huangyan1123

page is a WebBrowser object
WebBrowser page = new WebBrowser () defined in HTMLAnalysis class;

huangyan1123

Top yourself: don't sink.

How come no master has come.

jbtmdglhc

Did you originally want to read the webpage using WebBrowser without the interface being displayed, but the interface was occasionally displayed again?

huangyan1123

Yes, that's it.
What should I do?

huangyan1123

Is it because htmAnalysis = null was called?

?

When page.DocumentCompleted + = new WebBrowserDocumentCompletedEventHandler (Process);
When the called Process () has not been executed yet, htmAnalysis is null?

jbtmdglhc

up

huangyan1123

The problem has been solved is the problem of dispose().
It is strange that if the webbrowser fails to open the website, this problem will occur in dispose.