asp.net Knockoutjs Async call to JS library before submitting

[velli...@gmail.com]

I am using Knockoutjs in old asp.net webapplication. I have requirement that on asp.net submit button click, I must call as JS library async and get response and then post the asp.net submit (i.e initiate asp.net button click event)?

Is there a way in Knockoutjs to wait for response from Async call and then submit? problem I have is since asp.net is sync and I when I make async call to JS library the form is submitting even before I receive response from JS library.

self.onButtonClick = function () {

    var jsdatatosubmit = {
        param1: '123',
        param2: '123qwewe'
    };
    object.functionTest(jsdatatosubmit)
    .success(

        function (response) {

            return true; //Submit asp.net form Call submit click event
        }   
    )
    .error();

    return false; //instead of true         

};

[velli...@gmail.com]

Any one?

[Doug S]

This isn't so much a Knockout question as a JS question, but you'd basically need to do something like this:

self.onButtonClick = function (data, event) {
    //block the submit
    event.preventDefault();

    var jsdatatosubmit = {
        param1: '123',
        param2: '123qwewe'
    };

    object.functionTest(jsdatatosubmit)
    .success(

        function (response) {

            //submit the form when the callback completes
            //assuming there's a single form since it's asp.net

            document.forms[0].submit();

        }   
    )
    .error();
};