Click the prevent button multiple times to prevent malicious refresh

Source: Internet
Author: User
<Asp: button runat ="Server"Id ="BTN"TEXT ="Button"Onclick ="Aa_click"/>

Public VoidPage_load (Object OBJ, eventargs E)
BTN. Attributes. Add ("Onclick","State = true ;");
Stringbuilder sb =NewStringbuilder ();
SB. append ("If (! State) return ;");
SB. append ("Var button = Document. getelementbyid ('btn ');");
SB. append ("Button. value = 'Please wait ...';");
SB. append ("Document. Body. style. cursor = 'wait ';");
SB. append ("Button. Disabled = true ;");
StringStrscript ="<SCRIPT>";
Strscript = strscript +"Var state = false ;";
// Bind the function to the onbeforeunload event on the page:
 strscript = strscript + " window. attachevent ('onbeforeunload', function () {" + sb. tostring () +  "});" ; 
Strscript = strscript +"</"+"Script>";
Page. registerstartupscript ("Onbeforeunload", Strscript );
Protected VoidAa_click (ObjectSender, eventargs E)
// Simulate button processing for a long time
 system. threading. thread. sleep (2000); 
Response. Write ("<SCRIPT> alert ('bbbbbb !! ');"+"</"+"Script>");

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.