jqGrid - Default Add / Edit Buttons - Processing Server Response

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I am working on my first implementation of a jqGrid. I am using the standard add/edit buttons that appear in the navGrid but am having problems identifying how process the server response when I click Submit in the edit/add forms.

.navGrid("#product-codes-footer",{edit:true,add:true,del:false},
{afterShowForm:afterShowEdit}, {afterShowForm:afterShowAdd} );

Is there a standard callback or event parameter I am missing somewhere regarding this? Is there a way to define how saveRow is called or is there a default success/error callback method I can implement?

Any direction would be much appreciated!!!


There appears to be a couple event parameters that I failed to completely read and comprehend...

API --> http://www.trirand.com/jqgridwiki/doku.php?id=wiki:form_editing#editgridrow

using the event parameters for afterSubmit and afterComplete allow me to process the server response and update the form.

--Dan

EDIT Here is an example of the code used...

.navGrid(
        "#product-codes-footer",
        {edit:true,add:true,del:false},
        {
            afterShowForm:afterShowEdit,
            afterSubmit:processAddEdit,
            beforeSubmit:validateData,
            closeAfterAdd: true,
            closeAfterEdit: true
        },
        {
            afterShowForm:afterShowAdd,
            afterSubmit:processAddEdit,
            beforeSubmit:validateData,
            closeAfterAdd: true,
            closeAfterEdit: true
        }
);
function afterShowEdit(formId) {

            //do stuff after the form is rendered
        }
        function afterShowAdd(formId) {

            //do stuff after the form is rendered
        }
        function processAddEdit(response, postdata) {
            var success = true;
            var message = ""
            var json = eval('(' + response.responseText + ')');
            if(json.errors) {
                success = false;
                for(i=0; i < json.errors.length; i++) {
                    message += json.errors[i] + '<br/>';
                }
            }
            var new_id = "1";
            return [success,message,new_id];
        }