如果页面是回发，则禁用确认导航

Question

I have included a script that prompts "confirm navigation" when user makes changes on the form here is the code:

var warning = true;
    window.onbeforeunload = function () {
        if (warning) {
            return "You have made changes on this page that you have not yet confirmed.   If you navigate away from this page you will lose your unsaved changes";
        }
    }

    $('claimformmain').submit(function () {
        window.onbeforeunload = null;
    });

my problem is I have a function that has postback, can I disable the script if page is postback? thanks

Answer 1

You can do something like this.

Add one hidden field in Your HTML

<input type="hidden" id="hdnIsPostBack" value="false" />

Write in your code behind

if(Page.IsPostBack)
    hdnIsPostBack.Value = "true";
else
    hdnIsPostBack.Value = "false";

And your Jquery function is go this way.

$( document ).ready(function() {
    if( $('#hdnIsPostBack').val() == "true")
    {
        //Your Function goes here.
    }
}

Answer 2

您可以将单击事件附加到您的回发控件，您可以在其中将 window.onbeforeunload 设置为 null。