异步数据

1:获取数据的页面:

 1  protected void Page_Load(object sender, EventArgs e)
 2     {
 3         if (!IsPostBack) {
 4            //是否接收参数
 5             if (!string.IsNullOrEmpty(Request["type"])) {
 6                 
 7                 switch (Request["type"]) { 
 8                     case "ZXQG":
 9                         if (Cache["ZXQG"] == null)
                         {
                             try
                             {
                                 List<XbProductProvide> PPList = new List<XbProductProvide>();
                                 List<string> SearchStr = new List<string>();
                                 SearchStr.Add("InfoType=2");
                                 PPList = XbProductBPM.SelectProductProvideList(SearchStr.ToArray(), "ID,EnterpriseID,Title", "CreationDate DESC", 5, 0, "ID");
                                 StringBuilder Sb = new StringBuilder();
                                 for (int i = 0; i < PPList.Count && i < 5; i++)
                                 {
                                     Sb.Append("<p><a href=\"http://tg.xband.cn//SupplyDemand/Supply.aspx?provideID=" + PPList[i].ID + "&entID=" + PPList[i].EnterpriseID + "\" target=\"_blank\">" + (PPList[i].Title.Length > 15 ? PPList[i].Title.Substring(0, 15) : PPList[i].Title) + "</a></p>");
                                 }
                                 Cache.Insert("ZXQG", Sb.ToString(), null, DateTime.Now.AddMinutes(5), TimeSpan.Zero);
 
                             }
                             catch (Exception ex)
                             {
                                 Cache.Insert("ZXQG", ex.Message, null, DateTime.Now.AddMinutes(5), TimeSpan.Zero); ;
                             }
                             finally
                             {
                                 Response.Write(Cache["ZXQG"].ToString());
                             }
                         }
                         else {
                             Response.Write(Cache["ZXQG"].ToString());
                         }
                             break;
                     //最新加盟的数据
                     case "ZXJM":
                         if (Cache["ZXJM"] == null)
                         {
                             try
                             {
                                 List<XbView_Enterprise_Account> ECList = new List<XbView_Enterprise_Account>();
                                 List<string> SearchStr2 = new List<string>();
                                 SearchStr2.Add("MemberLevel=15");
                                 SearchStr2.Add(" and IndustryCategoryID='4f691d0a-9d8b-40e7-88e1-18970fe4fa74' ");
                                 SearchStr2.Add(" and Name is not null");
                                 ECList = XbEnterpriseBPM.SelectView_Enterprise_AccountList(SearchStr2.ToArray(), "NickName,EnterpriseId,Name", "CreationDate DESC", 6, 0, "ID");
                                 StringBuilder Sb2 = new StringBuilder();
                                 for (int i = 0; i < 6 && i < ECList.Count; i++)
                                 {
                                     Sb2.Append("<p><a href=\"http://light.xband.cn/eStore/Index.aspx?CorpID=" + ECList[i].EnterpriseID + "\">" + (ECList[i].Name.Length > 15 ? ECList[i].Name.Substring(0, 15) : ECList[i].Name) + "</a></p>");
                                 }
                                 Cache.Insert("ZXJM", Sb2.ToString(), null, DateTime.Now.AddMinutes(5), TimeSpan.Zero);
                             }
                             catch (Exception ex)
                             {
                                 Cache.Insert("ZXJM", ex.Message, null, DateTime.Now.AddMinutes(5), TimeSpan.Zero);
                             }
                             finally
                             {
                                 Response.Write(Cache["ZXJM"].ToString());
                             }
                         }
                         else {
                             Response.Write(Cache["ZXJM"].ToString());
                         }
                             break;
                   //默认无返回
                     default:
                     break;
                 }
             }
         }
     }

 

注意前台页面需要清除所有代码只保留@Page行,如

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GetData.aspx.cs" Inherits="dealer_GetData" %>

2:异步JavaScript

 

 1 // JScript 文件
 2  function startHTTP(id)
 3  {  
 4     var xmlhttp;
 5     if(window.ActiveXObject)
 6     {
 7        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
 8     }
 9     else if(window.XMLHttpRequest)
     {
        xmlhttp=new XMLHttpRequest();
     }
     xmlhttp.onreadystatechange=function(){
         if(xmlhttp.readystate==4)//判断是否是完成状态
         {
             if(xmlhttp.status==200)//判断是否执行成功
             {
                document.getElementById(id).innerHTML=xmlhttp.responsetext;
             }
         }
     };
     xmlhttp.open("GET","GetData.aspx?type="+id,true);
     xmlhttp.send(null);
  }
 

 

3:前台引用代码

 

<div class="week_top10_con" id="ZXQG">
   <script language="javascript" type="text/javascript">startHTTP('ZXQG')</script>
</div>

 

前台调需要注意的是,DIV的ID与调用时的参数需保持一致