Webbrowser: JavaScript on the execution page

After obtaining a page, webbrowser can execute script functions on the page. For example

Htmlelement. invokemember () method

Or

Htmldocument Doc = webbrowser1.document;

Doc. invokescript (jsfun, new object []... {jsparameter });

 

But does Java's httpclient seem to be okay?

 

The following is an article about using webbrowser to implement this task:

C #, webbrowser, login, data filling, analog click link, run JS function (http://www.outdosoft.com/winfrom/57372116J.html)

 

 

Determine whether the network is normal

Private bool isconnectedtointernet ()

{

Int DESC;

Return Internet. internetgetconnectedstate (Out DESC, 0 );

}

Set the default page:

Webbrowser1.navigate (New uri ("http://www.ic2ic.com/copy.jsp "));

Logon code:

Private void btnlogin_click (Object sender, eventargs E)

{

Webbrowser1.document. getelementbyid ("ID"). innertext = txtuser. Text. tostring (). Trim (); // fill name

 

Webbrowser1.document. getelementbyid ("passwd"). innertext = txtpwd. Text. tostring (). Trim (); // fill pwd

Htmlelement formlogin = webbrowser1.document. Forms ["frmlogin"];

Formlogin. invokemember ("Submit ");

Thread. Sleep (5000 );

Herfclick ("http://www.ic2ic.com/upload.jsp"); // This is a successful login operation, jump to // upload. asp

// Note that the link is not directly skipped.

// The session will not be lost.

Herfclick ("http://www.ic2ic.com/copy.jsp ");

}

 

Simulated click link:

Private void herfclick (string URL)

{

For (INT I = 0; I <webbrowser1.document. All. Count; I ++)

{

If (webbrowser1.document. all [I]. tagname = "A" & webbrowser1.document. all [I]. getattribute ("href "). tostring (). trim () = URL)

{

Webbrowser1.document. All [I]. invokemember ("click"); // triggers the "click" event.

Break;

}

}

}

Run JS functions on the webpage

Private void calljsmethod (string jsfun, string jsparameter) // function name, function parameter

{

Htmldocument Doc = webbrowser1.document;

Doc. invokescript (jsfun, new object []... {jsparameter });

}

Fill data:

Private void filldate (string txt)

{

Htmlelement frmword = webbrowser1.document. Forms ["frmword"]; // find from

Htmlelementcollection txtarea = frmword. getelementsbytagname ("textarea ");

Htmlelementcollection radio = frmword. getelementsbytagname ("input ");

Radio [2]. invokemember ("click"); // select the radio control

Txtarea [0]. innertext = TXT. tostring ();

}