ASP.NET CheckBox disabling postback with javascript

Question

I'm trying to wire up a CheckBox to handle an event when check/unchecked. If the user has JavaScript enabled, use that, otherwise use a postback.

Here is my code:

<asp:CheckBox ID="ApplicationInProcessCheckBox" runat="server" 
    Text="Application In Process" AutoPostBack="true" 
    oncheckedchanged="ApplicationInProcessCheckBox_CheckedChanged"
    onclick="return false;" />

The return false in the javascript onclick event is disabling the postback. However, it also won't let the box check or uncheck. (I have more code to add to the javascript event... I just want to get the concept working first).

What am I doing wrong?

what do you actually want to do? you want when the checkbox is checked to trigger an event in server side, or you want to make another element do something? — TStamper
– TStamper, Commented May 15, 2009 at 4:11
I am eventually going to replace the return false call with a method call that returns false but does other stuff like hiding/displaying controls. If the user has Javascript enabled, I want this method to handle it on the client side, otherwise I want my server side event to run. — Mike Cole
– Mike Cole, Commented May 15, 2009 at 4:19

Jonathan Leffler · Accepted Answer · 2011-07-09 05:31:36Z

1

I think we can't post back on clicking checkbox without Javascript enabled.

edited Jul 9, 2011 at 5:31

Jonathan Leffler

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answered May 15, 2009 at 4:41

Priyan Rajeevan

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3 Comments

Mike Cole Over a year ago

I think you are misunderstanding. When I click this CheckBox, I want to disable/enable a textbox. If Javascript is enabled, I want to do it in Javascript with no postback. If not, I want the postback and code behind to handle it.

Nahom Tijnam Over a year ago

@Mike - The autopostback is done using javascript, so if javascript is not available then the autopostback would not work.

Mike Cole Over a year ago

Ahhh... I see what you're saying now. Sorry for the misunderstanding.

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