.net – How to force Web Browser control to always open web page in the same window

As per Prerak K's update comment (since deleted):

I guess I have not presented the question properly.

Situation is this: I want to load data into a global variable based on the value of a control. I don't want to change the value of a control from the child thread. I'm not going to do it ever from a child thread.

So only accessing the value so that corresponding data can be fetched from the database.

The solution you want then should look like:

UserContrl1_LOadDataMethod()
{
    string name = "";
    if(textbox1.InvokeRequired)
    {
        textbox1.Invoke(new MethodInvoker(delegate { name = textbox1.text; }));
    }
    if(name == "MyName")
    {
        // do whatever
    }
}

Do your serious processing in the separate thread before you attempt to switch back to the control's thread. For example:

UserContrl1_LOadDataMethod()
{
    if(textbox1.text=="MyName") //<<======Now it wont give exception**
    {
        //Load data correspondin to "MyName"
        //Populate a globale variable List<string> which will be
        //bound to grid at some later stage
        if(InvokeRequired)
        {
            // after we've done all the processing, 
            this.Invoke(new MethodInvoker(delegate {
                // load the control with the appropriate data
            }));
            return;
        }
    }
}

private void Browser_ProgressChanged(object sender, WebBrowserProgressChangedEventArgs e)
{
    var webBrowser = (WebBrowser)sender;
    if (webBrowser.Document != null)
    {
        foreach (HtmlElement tag in webBrowser.Document.All)
        {
            if (tag.Id == null)
            {
                tag.Id = String.Empty;
                switch (tag.TagName.ToUpper())
                {
                    case "A":
                    {
                        tag.MouseUp += new HtmlElementEventHandler(link_MouseUp);
                        break;
                    }
                }
            }
        }
    }
}


private void link_MouseUp(object sender, HtmlElementEventArgs e)
{
    var link = (HtmlElement)sender;
    mshtml.HTMLAnchorElementClass a = (mshtml.HTMLAnchorElementClass)link.DomElement;
    switch (e.MouseButtonsPressed)
    {
        case MouseButtons.Left:
        {
            if ((a.target != null && a.target.ToLower() == "_blank") || e.ShiftKeyPressed || e.MouseButtonsPressed == MouseButtons.Middle)
            {
                AddTab(a.href);
            }
            else
            {
                CurrentBrowser.TryNavigate(a.href);
            }
            break;
        }
        case MouseButtons.Right:
        {
            CurrentBrowser.ContextMenuStrip = null;
            var contextTag = new ContextTag();
            contextTag.Element = a;
            contextHtmlLink.Tag = contextTag;
            contextHtmlLink.Show(Cursor.Position);
            break;
        }
    }
}

See more at dotBrowser.sf.net project