Wait for webBrowser to finish loading the page

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Hi !

I have a problem.

I use the webbrowser class to login to a place.
After I have logged into the site, I want to visit a link.

The problem is when I have logged into the place, it won´t visit the link. If I show an messagebox after logged in and before I visit the link, it works.

The Code:

C#

//For login: 

webBrowser3.Document.GetElementsByTagName("input")[1].InnerText = "password";
            webBrowser3.Document.GetElementsByTagName("input")[0].InnerText = "username";
                       
webBrowser3.Document.GetElementById("selection").Focus();
            SendKeys.Send("{DOWN}");
            SendKeys.Send("{TAB}");
         SendKeys.Send("{Enter}");
//After this I being logged into the site


//After login
while (webBrowser3.ReadyState != WebBrowserReadyState.Interactive) Application.DoEvents();
         {
             Application.DoEvents();
         }

webBrowser3.Document.Links[15].InvokeMember("click");
//Clicking the link.

//If I put in a messagebox before the last link, I can visit the link, otherwise I dont get logged in, its like the webbrowser hasn´t finished loading the page.

Regards Joakim

Posted 1-Mar-11 1:34am

!Kerish11

Updated 1-Mar-11 1:39am

Sunasara Imdadhusen

v2

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Comments

Sunasara Imdadhusen 1-Mar-11 7:39am

Applied code formatting!!

!Kerish11 1-Mar-11 7:52am

Sorry about that, my first time posting a question.

1 solution

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Albin Abel · Answer 1 · 2011-03-01T03:13:00

Solution 1

After you send keys, set a global variable say bool login_initiated=true;

Handle the link click invocation in the document completed event..

you need to add a event handler on some event like form load etc.

webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);

C#

protected void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    if (login_initiated == true)
    {
        webBrowser3.Document.Links[15].InvokeMember("click");
    }
}

Posted 1-Mar-11 3:13am

Albin Abel

Comments

Sandeep Mewara 1-Mar-11 9:19am

Good answer... 5!

!Kerish11 1-Mar-11 9:26am

Thank you alot. It works perfectly !.

Albin Abel 1-Mar-11 9:38am

Thanks Sandeep.
You are welcome Kerish

!Kerish11 1-Mar-11 10:07am

I might be stupid. After I press the link, I want to continue to another page from there, how can I do that ? I want to use something like "webBrowser1.Document.GetElementsByTagName("input")[1].InvokeMember("click");"

Albin Abel 1-Mar-11 10:25am

I assume just the chaining of events. The same way after execute the hyperlink click set a variable say loading_second_page=true. Again in the document completed event handler check for this boolean, if true then execute your button click. So setting a global variable and document completed events chaining. So here instead of using IF you can use case statements.

Also instead of using select by tag and the index, why don't use select by ID?. Because the index are easy changeable in a website under modification

!Kerish11 1-Mar-11 10:36am

Yeah, but problem is that you are clicking the link in the document completed event.
So the code be something like this " if (login_initiated == true) { webBrowser3.Document.Links[15].InvokeMember("click"); loading_second_page=true; }

if (loading_second_page==true) {

webBrowser1.Document.GetElementsByTagName("input")[1].InvokeMember("click");
// webBrowser3.Document.GetElementsByTagName("input")[1].InvokeMember("click");
}"

And then it doesn´t work.

!Kerish11 1-Mar-11 10:43am

Sorry... I write the code again.

if (login_initiated == true) { webBrowser3.Document.Links[15].InvokeMember("click"); loading_second_page=true; login_initiated = false; }

if (loading_second_page==true) {

webBrowser3.Document.GetElementsByTagName("input")[1].InvokeMember("click");
}

!Kerish11 1-Mar-11 10:46am

I worked it out, be its not a fancy solution:

if (loading_second_page==true) {

try
{
webBrowser3.Document.GetElementsByTagName("input")[1].InvokeMember("click");

loading_second_page = false;

}

catch
{

}

Wait for webBrowser to finish loading the page

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Wait for webBrowser to finish loading the page

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