I have a project that reads content from web and saves it to the database.
I use Timer control to wait for ajax changes and it has been working for a long time without any problem.
But unexpectedly it is not working any more. I get the following error :
Exception thrown: 'System.Runtime.InteropServices.COMException' in SnapshotInfo.exe
Additional information: Error HRESULT E_FAIL has been returned from a call to a COM component.
Part of the code on this problem :
WebBrowser _browser = new WebBrowser();
private void Form1_Load(object sender, EventArgs e)
{
_browser.Dock = DockStyle.Fill;
_browser.DocumentCompleted += _browser_DocumentCompleted;
Controls.Add(_browser);
}
private void _browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (!timer1.Enabled)
{
// do any thing
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
_browser.Dispose();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (_browser.Document==null || _browser.Document.Body==null) return;
var body = _browser.Document.Body.InnerHtml; // ----> error here
if (body.Contains("word"))
{
// code when word is exist
timer1.Enabled = false;
}
}
private void button1_Click(object sender, EventArgs e)
{
_browser.Navigate(textBox1.Text);
timer1.Enabled = true;
}
I do not know where is the problem?
Thanks for any help
