如何检查一个复选框是否在 jQuery 选中？

Question

I need to check the checked property of a checkbox and perform an action based on the checked property using jQuery.

For example, if the age checkbox is checked, then I need to show a textbox to enter age, else hide the textbox.

But the following code returns false by default:

if ($('#isAgeSelected').attr('checked'))
{
    $("#txtAge").show();
}
else
{
    $("#txtAge").hide();
}

How do I successfully query the checked property?

转载于:https://stackoverflow.com/questions/901712/how-to-check-whether-a-checkbox-is-checked-in-jquery

Answer 1

This worked for me:

$get("isAgeSelected ").checked == true

Where isAgeSelected is the id of the control.

Also, @karim79's answer works fine. I am not sure what I missed at the time I tested it.

Note, this is answer uses Microsoft Ajax, not jQuery