一般处理程序应用示例

通过js调用ashx中的test()方法
js：

        function test(id,pwd){
            $.ajax({
                url: '/Tools/Handler.ashx?action=Log',
                data:{id : id, pwd : pwd },
                success: function (data){
                    alert(data);
                }
            });
        }

一般处理程序(ashx)：

        using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.Web.SessionState;

namespace UAS2._0.Business.Common
{
    /// <summary>
    /// Common 的摘要说明
    /// </summary>
    public class Common : IHttpHandler, IRequiresSessionState
    {
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");
            string action = context.Request["action"].ToString();
            switch (action)
            {
                case "PointForAjax":
                    PointForAjax(context);
                    break;
                case "Log":
                    Log(context);
                    break;
                default:
                    break;
            }
        }
        public bool IsReusable
        {
            get
            {
                return true;
            }
        }
        //公共js-Ajax返回状态码处理-数据库-字典-获取状态码
        public  void PointForAjax(HttpContext context)
        {
            string field = context.Request["field"].ToString();
            List<sysDictionary> dictionaryList = DBManage.GetListBySql<sysDictionary>("SELECT * FROM [sys_Dictionary] where [field]='" + field + "'");
            context.Response.Write(new JavaScriptSerializer().Serialize(dictionaryList));
        }
        //记录日志
        public void Log(HttpContext context)
        {
            string source = context.ApplicationInstance.Request.UrlReferrer.AbsolutePath;
            string warnAction = context.Request["warnAction"].ToString();
            var user= context.Session["user"];
            context.Session.Abandon();//清除全部Session,即退出登录
        }
    }
}

参考：
https://blog.csdn.net/lily233/article/details/78752936