如何在前台腳本通過json傳遞數據到後台(使用微軟自帶的ajax)

首先，我們要在前台引入json的腳本，以便於把js對象序列化

<script type="text/javascript" src="/js/jquery.json-2.4.min.js"></script>

然後我們在前台聲明一個類,將你要保存的值放到類裡面，最後序列化

復制代碼 代碼如下:
function Save() {
            var examId = '<%=ExamId %>';
            var yearTerm = $("#<%=DDLYearTerm.ClientID %>").val();
            var examType = $("#<%=DDLExamType.ClientID %>").val();
            var examDate = $("#ExamDate").val();
            var examName = $("#ExamName").val();

            var exam = {};
            exam["ExamId"] = examId;
            exam["YearTerm"] = yearTerm;
            exam["ExamType"] = examType;
            exam["ExamDate"] = examDate;
            exam["ExamName"] = examName;
            var json = $.toJSON(exam);
            var Result = AjaxController.EditExam(json).value;
            if (Result == "Success")
            {
                alert("保存成功");
                parent.$.fancybox.close();
            }
            else
            {
                alert(Result);
            }
        }

然後我們在後台，進行反序列化，並使用值.因為我們使用ajax所以要在後台的方法上加上[Ajax.AjaxMethod]特性，並且在你前台所在頁面的cs裡面也要加上Ajax的注冊.具體使用看

微軟 ajax 庫 的使用方法( ajax.ajaxMethod) http://www.jb51.net/article/40764.htm

復制代碼 代碼如下:
protected void Page_Load(object sender, EventArgs e)
        {
            Ajax.Utility.RegisterTypeForAjax(typeof(Youjiao.xxt.BLL.Controller.AjaxController));
            if (!IsPostBack)
            {
                Databind();
            }
        }

復制代碼 代碼如下:
[Ajax.AjaxMethod]
        public string EditExam(string value)
        {
            string Result = "";
            try
            {
                if (HttpContext.Current.Request.IsAuthenticated)
                {
                    EditExam editExam = JsonSerializeHelper.DeserializeFromJson<EditExam>(value);
                    ExamController eController = new ExamController();
                    eController.EditExam(editExam);
                    Result = "Success";
                }
                else
                {
                    Result = "會話無效，請重登錄！";
                }
            }
            catch (Exception ex)
            {
                Result = ex.Message;
            }
            return Result;
        }

圖片：

復制代碼 代碼如下:
[Serializable]
    public class EditExam
    {
        public string ExamId { get; set; }
        public string YearTerm { get; set; }
        public string ExamType { get; set; }
        public string ExamDate { get; set; }
        public string ExamName { get; set; }
    }

這樣就可以很好的避免在前台js裡面傳入大量的參數，後台也可以直接反序列化為類來點出成員的值了