最近因为工作中遇到一个需求，需要做了一个批量导入功能，但长时间运行没个反馈状态，很容易让人看了心急，产生各种臆想！为了解决心里障碍，写了这么个功能。

通过线程执行导入，并把正在执行的状态存入session，既共享执行状态，通过ajax调用session里的执行状态，从而实现反馈导入状态的功能！

上代码： 前端页面

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>批量导入数据</title>
 <style type="text/css">
  .pop_body_con { width: 310px; position: fixed; top: 50%; left: 50%; margin-left: -150px; background: #eee; display:none; }
   .pop_body_con .pop_head { width: auto; padding: 10px 0; background: #fff; }
    .pop_body_con .pop_head a { display: block; color: #717274; font-size: 12px; text-decoration: none; text-align: center; }
  .pop_box { width: auto; overflow: hidden; padding: 45px 10px; }
   .pop_box .pop_text { float: left; }
    .pop_box .pop_text p { padding: 0; margin: 0; font-size: 12px; line-height: 18px; color: #717274;}
   .pop_box .progress_bar_con { float: left; width: 220px; position: relative; z-index: 2; }
    .pop_box .progress_bar_con p { margin: 0; padding: 0; font-size: 12px; color: #fff; line-height: 18px; width: 100%;
            text-align: center; position: absolute; left: 0; top: 0; z-index: 4; }
    .pop_box .progress_bar_con .progress_bar_start { width: 100%; height: 18px; background: #C4C0C0; }
    .pop_box .progress_bar_con .progress_bar_end { width: 16%; height: 18px; background: #2bd35d; position: absolute; left: 0; top: 0; z-index: 3; }
   .pop_box .progress_bar_con { float: left; }
  #loading-mask { width: 100%; height: 100%; position: fixed; top: 0px; left: 0px; z-index: 0; display: none; }
 </style>
 <script src="ajax-master/jquery.js"></script>
 <script>
  var MyInterval;
 
  $(function () {
   $("#startImport").click(function () {
    MyInterval = setInterval(getState, 1000);
   });
  });
   
  function getState() {
   $.ajax({
    url: "test.aspx",
    type: "Post",
    data: { action: "getSession" },
    success: function (msg) {
     if (msg != "null") {
      msg = eval('(' + msg + ')');
      if (msg.being == 100) {
       setProcessBar(1, 1);
       $(".pop_body_con").hide();
       $("#loading-mask").hide();
       clearInterval(MyInterval);
      }
      else {
       $(".pop_body_con").show();
       $("#loading-mask").show();
       setProcessBar(msg.being, msg.count)
      }
     }
    }
   });
  }
 
  function setProcessBar(exeFlag, exeMax) {
   $("#progressbar_text").html(parseInt(roundFun(exeFlag / exeMax, 2) * 100) + "%");
   $("#progressbar_bar").attr("style", "width:" + parseInt(roundFun(exeFlag / exeMax, 2) * 100) + "%;");
  }
 
  function roundFun(number, X) {
   X = (!X ? 2 : X);
   return Math.round(number * Math.pow(10, X)) / Math.pow(10, X);
  }
 </script>
</head>
<body style="">
 <input id="startImport" type="button" value="导入数据" />
 <div id="loading-mask" ></div>
 <div class="pop_body_con">
  <div class="pop_head">
   <a href="javascript:;">正在导入…请勿操作！</a>
  </div>
  <div class="pop_box">
   <div class="pop_text">
    <p>导入进度：</p>
   </div>
   <div class="progress_bar_con">
    <p id="progressbar_text">0%</p>
    <div class="progress_bar_start"></div>
    <div class="progress_bar_end" id="progressbar_bar"></div>
   </div>
  </div>
 </div>
</body>
 
后台
using System.Linq;
using System.Threading;
using System.Web;
using System.Web.Script.Serialization;
using System.Web.UI;
using System.Web.UI.WebControls;
 
public partial class test : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
  string action = Request.Form["action"];
  if (!string.IsNullOrEmpty(action))
  {
   Hashtable temp = tmethod();
   if (temp == null)
   {
    Thread trd = new Thread(new ParameterizedThreadStart(insertData));
    trd.Start(action);
   }
   else
   {
    if (temp["reCode"].ToString() == "100")
    {
      
     Session.Remove("process");
    }
   }
 
   JavaScriptSerializer ser = new JavaScriptSerializer();
   String jsonStr = ser.Serialize(temp);
   Response.Write(jsonStr);
   Response.End();
  }
 }
 
 
 public Hashtable tmethod()
 {
  return (Hashtable)Session["process"];
 }
 
 private void insertData(object obj)
 {
  string action = obj.ToString();
  int tCount = 100;
  for (int i = 0; i < tCount; i++)
  {
   Hashtable stateHash = setStateVal(0, i, tCount, action);
   Session["process"] = stateHash; //存入session，方便共享执行状态
   Thread.Sleep(500);
  }
  Session["process"] = setStateVal(100, tCount, tCount, action);
  Thread.CurrentThread.Abort();
 }
 
 private Hashtable setStateVal(int code, int beingV, int CountV, string action)
 {
  Hashtable stateHash = new Hashtable();
  stateHash["reCode"] = code; //返回状态值
  stateHash["being"] = beingV;  //正在执行值
  stateHash["count"] = CountV;  //总值
  stateHash["action"] = action;  //总值
  return stateHash;
 }
}