从jquery提交表单并在jquery内捕获表单提交事件

您使用AJAX将表单动态添加到DOM中,这是异步的。所以当你打电话的时候 $('form').submit() 要绑定处理程序,表单尚未在DOM中。您需要在添加表单后调用它,方法是在 success: 作用

而且 $(this).parent("form").submit() 应该是 $(this).submit() . $(this) 是表单,您不需要转到它的父级。你应该使用 event.preventDefault() 以防止正常表单提交的发生。

$(document).ready(function() {
    var table  = $('#myTransactionitems').dataTable();  //Initialize the datatable
    var user = $(this).attr('id');
    if(user != '') 
    { 
        $.ajax({
            url: 'transactions',
            dataType: 'json',
            cache:false,
            success: function(s){
                console.log(s);
                table.fnClearTable();
                for(var i = 0; i < s.length; i++) {
                    var disp1 = '';
                    if (s[i][4] != 'Reserved') {
                        disp1 = 'display:none;'
                    }
                    table.fnAddData([
                        "<form method='post' action='reservesplit'><input name = 'transactionID' type='hidden'\
                    value='"+s[i][0]+"'></input><input type='submit' id = 'btn-bank' name='btn-bank' value = '"+s[i][0]+"' class='btn btn-link'>\
                   </input></form>",
                        s[i][1],
                        s[i][2],
                        s[i][3],
                        s[i][4],
                        s[i][5],
                        "<form method='post'><input name = 'transactionID' type='hidden'\
                    value='"+s[i][0]+"'><input name = 'donationID' type='hidden'\
                    value='"+s[i][2]+"'><input name = 'splitAmount' type='hidden'\
                    value='"+s[i][3]+"'></input></input><input type='submit' id = 'btn-paid' name='btn-paid' value = 'Paid'   style='" + disp1 +"' class='btn btn-success btn-sm pull-left '>\
                   </input></form><form method='post'><input name = 'transactionID' type='hidden'\
                    value='"+s[i][0]+"'><input name = 'donationID' type='hidden' \
                    value='"+s[i][2]+"'><input name = 'splitAmount' type='hidden'\
                    value='"+s[i][3]+"'></input><input type='submit' id = 'btn-cancel' name='btn-cancel' value = 'Cancel'  style='" + disp1 +"' class='btn btn-danger btn-sm pull-right'>\
                   </input></form>"
                        ]);                             
                } // End For

                $('form').submit(function(e){
                    alert("hello");
                    e.preventDefault();
                    $(this).find(':submit').attr('disabled','disabled');
                    $(this).submit();
                });
            },
            error: function(e){
                console.log(e.responseText);    
            }
        });
    }
});

或者可以使用事件委托,如中所述 Event binding on dynamically created elements?