How to maintain web controls when page is postback using javascript

Question

1.50/5 (2 votes)

See more:

My JavaScript

<script type="text/javascript">
function showRecurringBlock(ctl00_MainContent_ddlRecurrence) {
debugger;
var vis = "none";
if (document.getElementById("ctl00_MainContent_chkIsRecurringTask").checked)
vis = "block";
document.getElementById(ctl00_MainContent_ddlRecurrence).style.display = vis;
}
</script>
<script type="text/javascript">
function check_dd() {
if (document.getElementById('ctl00_MainContent_ddlRecurrence').value == "2") {
document.getElementById('ctl00_MainContent_divRecurringDays').style.display = 'block';
} else {
document.getElementById('ctl00_MainContent_divRecurringDays').style.display = 'none';
}
}
</script>

Question ->
DropDownList id= ddlRecurrence Control disappeared after page post back

Posted 18-Dec-15 19:49pm

Aniket Mali

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2015-12-19T00:35:00

This problem can be solved by session state means specific to ASP.NET, https://msdn.microsoft.com/en-us/library/ms178581.aspx[^].

But as JavaScript is mentioned in your tags, I would like to suggest a pure client-side approach, using Web storage. This approach is more universal (as soon as JavaScript is not disabled in the browser :-)), because it does not depend on what you have on the server side or if you have server side at all.

Please see: https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API[^].

You can find a complete sample in this section my article: JavaScript Calculator, 7. Dynamic Strict Mode Switching and Web Storage.

—SA