Question

当我点击提交按钮时，我无法收到值yearend。相反，我得到了一个未定义的值。单击“提交”按钮后，如何获得yearend值？

我的代码：

$("#company").change(function() {

    $("#dFrom").val("");
    $("#dTo").val("");
    var pass_code = $("#company").val();
    var callpage = "dentrycomp.php?pass_code=" + pass_code
    var yearend= null;
    $.ajax({
        type: "GET",
        url: callpage,
        async: false,
        success: function(data) {
            yearend= data,
            $("#content").html("")
            $("#content").html(data)
        }
    });
    //var yearend = "<?php echo $_SESSION['yearend'] ; ?>"
    alert(yearend +"company");
    this alert box getting the right value yearend.i want that value recieve in under submit button                         
    return true;
});


$('#submit').live('click',function() {
//var yearend = "<?php echo $_SESSION['yearend'] ; ?>"
alert("this is submit button"+yearend);

Answer 1

var yearend = null;

$("#company").change(function() {

    $("#dFrom").val("");
    $("#dTo").val("");
    var pass_code = $("#company").val();
    var callpage = "dentrycomp.php?pass_code=" + pass_code

    $.ajax({
        type: "GET",
        url: callpage,
        async: false,
        success: function(data) {
            yearend = data,
            $("#content").html("")
            $("#content").html(data)
        }
    });

    //var yearend = "<?php echo $_SESSION['yearend'] ; ?>"
    alert(yearend + "company");
    this alert box getting the right value yearend.i want that value recieve in under submit button
    return true;
});

$('#submit').live('click', function() {
//var yearend = "<?php echo $_SESSION['yearend'] ; ?>"
alert("this is submit button" + yearend); });

您应该全局声明yearend，即代码顶部。

Answer 2

我认为这是因为范围不同。您必须在请求之前定义变量，然后重新定义它并在AJAX请求之后获取它。

Answer 3

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
   $.ajax({
                              type: "GET",
                              url: callpage,
                              async: false,
                              success: function(data) {
                              yearend= data,
                              $("#content").html("")
                              $("#content").html(data)
                              $('#submit').live('click',function(){

                               alert("this is submit button"+yearend);
                               });

                              }

                            });
});
</script>
</head>
<body>

</body>
</html>

Answer 4

您在ajax电话yearned之外的ajax的预期行为是undefined。将您的点击功能放在ajax调用中。因此，一旦您的ajax调用完成并成功，您将在成功函数中附加您的事件侦听器。请改用此逻辑：

$.ajax({
                              type: "GET",
                              url: callpage,
                              async: false,
                              success: function(data) {
                              yearend= data,
                              $("#content").html("")
                              $("#content").html(data)
                              $('#submit').live('click',function(){
                              //var yearend = "<?php echo $_SESSION['yearend'] ; ?>"

                               alert("this is submit button"+yearend);
                               });

                              }


                            });

如何在提交按钮下使用ajax数据变量

4 个答案: