CODEWITHSUNDEEP
c#webbrowser-controlscreen-scraping
tjcinnamon
tjcinnamon

Reputation: 375

Check to see if webbrowser has loaded new page without document complete

I'm writing writing a program to perform some basic tests and I'm trying to get it to automatically login. It seems that the documentComplete event would be overused if I had to use it for every possible scenario.

I saw a number of examples with Browser ReadyState but I'm unable to get them to work.

I have a simple method which finds the username element, enters the user name, invokes the click method, finds the password element, enters the password, and invokes the click method.

If I delay the process with a messagebox then it works because it gives the page time to load. 

private void fillInLogin()
        {
            browser.Document.GetElementById("des_LoginName").InnerText = "myLogon";
            browser.Document.GetElementById("btnLogOn").InvokeMember("click");

            //*********WHAT CAN I PUT HERE TO CHECK TO SEE IF THOSE ELEMENTS EXIST***********

            browser.Document.GetElementById("des_Password").InnerText = "myPassword";
            browser.Document.GetElementById("btnSubmit").InvokeMember("click");

        }

Upvotes: 0

Views: 475

Answers (1)

gmiley
gmiley

Reputation: 6604

Have you looked into subscribing to the WebBrowser.DocumentCompleted event? It takes all of the guesswork out of waiting for a page to load, and is actually the proper way to do it. You can't really rely on a server response to be completed within a given wait period. Usually the only guarantee is the timeout period of your client code, but you don't want to force a wait to the timeout maximum. Using a threaded request and an event listening for the callback will allow you to make the request and continue to provide a responsive UI to the user.

Upvotes: 1

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