Question

Hey all I am designing a website in ASP.net from a PHP designed site. They do their form checks via JavaScript and then submit all data via Ajax if it passes validation.

Is it possible to fire off a piece of JavaScript from a submit button via code behind and read the returned value before I process to either postback to save the data or do nothing until the user corrects the fields indicated by the JavaScript?

Answer 1

If you are doing the validation in javascript, i would make a hidden submit button that gets clicked by the javascript button if the validation passes:

<input type="button" value="validate" onclick="Validate()" />

<asp:Button ID="aspButton" class="aspButton" OnClick="CodeBehindMethod" style="display: none;" />


<script>
function Validate() {
    //if validation passes
    $(".aspButton").click(); //This is the reason for the class on this button, since                       
                             //asp buttons have huge long stupid id names
    //else do some kind of error notification
}

</script>

If you are validating in code behind, then why not just use a post back from a submit button?