触发javascript不起作用

Question

I develop in ASP and I use jquery .

I am unable to use the trigger function on page load .

My change function works but not when I call loading

$(function () {
    $(<%= C36.ClientID %>).trigger("change");
});

<%-- C36 --%>
$(<%= C36.ClientID %>).change(function () {
    if ($(<%= C36.ClientID %>).val())
        Maj_AlertCFE('NoDest', '0');
    else
        Maj_AlertCFE('NoDest', '1');        
})

Answer 1

ClientID returns the "id" attribute of the element as it is rendered on the client. So if that id is, for example "myid", your jQuery statement will render like this:

$(myid).trigger("change");

Unless you have a Javascript variable named myid this code will obviously fail.

What you really need is this:

$("#myid").trigger("change");

So you need to add in the quotes and # character to your statements:

$("#<%= C36.ClientID %>").trigger("change");

Answer 2

If it is working as is you should be able to simply do:

$(<%= C36.ClientID %>).change(function () {
    if ($(this).val())
        Maj_AlertCFE('NoDest', '0');
    else
        Maj_AlertCFE('NoDest', '1');
//trigger change now        
}).change();