[Help] - Check if a webpage contains some text then do something (C#)

[KynloStephen66515]

Actually going to pull my hair out if I can't work this out lol

Trying to work out how the hell to check if a webpage contains a certain string of text, and if it does, then do something (I know how to get it to do something afterwards...just can't work out how to CHECK)

In non-code, this would be:

if webPage.ContainsString("No Messages Found") {  //Do Something } else { //Do Something Different }

Bit vague on this I know, I suck at explaining these things

[Ath]

You can use a webbrowser control to fetch the page, then check its content with a regex.

[KynloStephen66515]

You can use a webbrowser control to fetch the page, then check its content with a regex.

-Ath (September 07, 2014, 03:33 PM)

I was already using a webBrowser control and was looking into using the HTML Agility Pack I got off NuGet to do this, but it is seeming like a pain in the ass...Also..I suck BADLY with Regex lol

[Renegade]

I was already using a webBrowser control and was looking into using the HTML Agility Pack I got off NuGet to do this, but it is seeming like a pain in the ass...Also..I suck BADLY with Regex lol

-Stephen66515 (September 07, 2014, 03:39 PM)

You need to decide on which control you will use. I'll use the stock control here.

Code: C# [Select]

1. private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
2.         {
3.             if (webBrowser1.DocumentText.Contains("No Messages Found")) {
4.                 this.Text = "No Messsaged Found found";
5.             }
6.         }

That is all you need.

[Ath]

Also..I suck BADLY with Regex lol

-Stephen66515 (September 07, 2014, 03:39 PM)

There's a fix for that, reported here, in our DC forum

[KynloStephen66515]

I was already using a webBrowser control and was looking into using the HTML Agility Pack I got off NuGet to do this, but it is seeming like a pain in the ass...Also..I suck BADLY with Regex lol

-Stephen66515 (September 07, 2014, 03:39 PM)

You need to decide on which control you will use. I'll use the stock control here.

Code: C# [Select]

1. private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
2.         {
3.             if (webBrowser1.DocumentText.Contains("No Messages Found")) {
4.                 this.Text = "No Messsaged Found found";
5.             }
6.         }

That is all you need.

-Renegade (September 08, 2014, 12:52 AM)

I couldn't actually get that to even DO anything lol (Although, it does compile...so might be something I did(n't) do.)

[hamradio]

One way to not even use the web browser control should be as simple as this...

Code: C# [Select]

1. WebClient myWebClient = new WebClient();
2. string siteSource = myWebClient.DownloadString("PLEASECHANGETOYOURURL");
3.  
4. if (siteSource.Contains("YOURTEXT"))
5. {
6. // Your string found code here.
7. }
8. else
9. {
10. // Your string not found code here.
11. }

For more info: (Note: I'm not affiliated with Dot Net Perls in any size, shape, and/or form.)

http://www.dotnetperls.com/webclient

[Renegade]

Here's the project:

WebCheckStephen.zip (30.35 kB - downloaded 567 times.)

You can run the debug or compile it yourself. It's done in VS2010.

The WebClient method is actually better, but the way I have that there is a bit more visual with a control, etc. Also, you can actually surf with it.