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POHow to test if Webbrowser gets a connection error when navigating to a new URL?
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  1. POHow to test if Webbrowser gets a connection error when navigating to a new URL?
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    copied!<p>I have a PC that loses the Internet connection every 5 minutes. (long to explain why).<br/> On the background I'm running a C# timer every 10 mins that does very simple stuff:</p> <pre><code>WebBrowser bobo = new WebBrowser(); bobo.Navigate(url); while(bobo.ReadyState != WebBrowserReadyState.Complete){Application.DoEvents();} string responsestring = bobo.DocumentText.ToString(); bobo.Dispose(); // and then do some stuff with responsestring </code></pre> <p>It is very important to make sure that bobo webbrowser DID have an Internet connection when it was loading the page. How do I do that?</p> <p>I tried "try-catch" statement, but it does not throw exceptions when there is no Internet.</p> <p>I thought of doing the "loading complete" handler, but it will make my program very complex and use too much memory, so looking for other ways.</p> <p>My latest solution is:</p> <pre><code>... while(bobo.ReadyState != WebBrowserReadyState.Complete){Application.DoEvents();} if (bobo.DocumentTitle == "Navigation Canceled"){throw new DivideByZeroException();} ... </code></pre> <p>It works fine for bobo browser. But when I work with responsestring - I create many other browsers (one by one) - and this solution does not work there.</p> <p>Is there some other kind of test that I did not mention?</p> <p>Solution found:<br/> Thanks a lot.<br/> I did not use your solution (it returns TRUE few seconds after connection is turned off).<br/> But I found this:</p> <pre><code>[DllImport("wininet.dll", SetLastError = true)] static extern bool InternetCheckConnection(string lpszUrl, int dwFlags, int dwReserved); public static bool CanConnectToURL(string url) { return InternetCheckConnection(url, 1, 0); } </code></pre> <p>It literally sends a PING to the URL, and returns TRUE if answer is received, otherwise it returns FALSE. Works perfect.</p>
 

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