本文讲述了asp.net异步获取datatable并显示的实现方法。分享给大家供大家参考,具体如下:
上面就是结果,前台代码如下:
%@ Page Language="C#" AutoEventWireup="true" CodeFile="MethodOne.aspx.cs" Inherits="_Default" %> !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> html xmlns="http://www.w3.org/1999/xhtml"> head runat="server"> title>/title> link href="swcss.css" rel="stylesheet" type="text/css" /> link href="TableZB.css" rel="stylesheet" type="text/css" /> script src="js-datagrid/scripts/PagerView.js" type="text/javascript">/script> link href="js-datagrid/style.css" rel="stylesheet" type="text/css" /> script src="jquery-1.4.1.min.js" type="text/javascript">/script> script type="text/javascript"> var currentpage = 1; $(document).ready(function() { $.get("Handler.ashx?flag=dataindex=" + currentpage, function(data) { $("#sjxs").append(data); }); $.get("Handler.ashx?flag=count", function(count) { var pager = new PagerView('pager'); pager.itemCount = count; pager.size = 5; pager.onclick = function(index) { currentpage = index; $.get("Handler.ashx?flag=dataindex=" + index, function(data) { $("#sjxs tr").each(function(m) { $("#add" + m).remove(); }); $("#sjxs").append(data); }); }; pager.render(); } ); }); /script> /head> body> form id="form1" runat="server"> fieldset style="width: 98%; border: solid 1px #EDF7DC;" class="fileset_style"> legend class="leg_style">查询结果/legend> %--div style="overflow:scroll;width:100%;height:100%">--%> table border="1" cellpadding="0" cellspacing="0" width="100%" align="center" id="sjxs" class="TableStyleZB"> tr class="trTitle"> td colspan="5">当前发票库存情况/td> td colspan="4">购买后一年(含)以上未验旧使用情况/td> td>/td> /tr> tr class="trTitle"> td>管理机关/td> td>合计/td> td>机打发票/td> td>手工发票/td> td>冠名发票/td> td>其他/td> td>正常户/td> td>占库存户数的比率/td> td>非正常户/td> td>证件失效户/td> /tr> tr class="trTitle"> td>0/td> td>1/td> td>2/td> td>3/td> td>4/td> td>5/td> td>6/td> td>7=6/1/td> td>8/td> td>9/td> /tr> /table> %--/div>--%> /fieldset> div id="pager">/div> div id="info">/div> /form> /body> /html>
处理页面程序如下:
%@ WebHandler Language="C#" Class="Handler" %> using System; using System.Web; using System.Data; using System.Data.SqlClient; using System.Text; public class Handler : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/plain"; if (context.Request.QueryString["flag"].Equals("data")) { context.Response.Write(GetResult(5,Int32.Parse(context.Request.QueryString["index"]))); } if (context.Request.QueryString["flag"].Equals("count")) { context.Response.Write(getCount()); } } private string GetResult() { DataTable dt = new DataTable(); using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["conn"])) { conn.Open(); string sql = "SELECT * FROM TestBlog "; SqlDataAdapter sda = new SqlDataAdapter(sql, conn); sda.Fill(dt); } int rLen = dt.Rows.Count; int cLen = dt.Columns.Count; StringBuilder sb = new StringBuilder(); for (int j = 0; j rLen; j++) { sb.Append("tr>"); for (int i = 0; i cLen; i++) { sb.Append("td>"); sb.Append(dt.Rows[j][i].ToString()); sb.Append("/td>"); } sb.Append("/tr>"); } return sb.ToString(); } private string GetResult(int pagecount,int currentpage) { DataTable dt = new DataTable(); using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["conn"])) { conn.Open(); string sql = "SELECT TOP "+pagecount+" * FROM TestBlog tb WHERE ydid NOT IN (SELECT TOP "+pagecount*(currentpage-1)+" ydid FROM TestBlog tb2) "; SqlDataAdapter sda = new SqlDataAdapter(sql,conn); sda.Fill(dt); } int rLen = dt.Rows.Count; int cLen = dt.Columns.Count; StringBuilder sb = new StringBuilder(); for (int j = 0; j rLen; j++) { sb.Append("tr id=add"+j+">"); for (int i = 0; i cLen; i++) { sb.Append("td>"); sb.Append(dt.Rows[j][i].ToString()); sb.Append("/td>"); } sb.Append("/tr>"); } return sb.ToString(); } private string getCount() { DataTable dt = new DataTable(); using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["conn"])) { conn.Open(); string sql = "select count(*) from testblog"; SqlDataAdapter sda = new SqlDataAdapter(sql, conn); sda.Fill(dt); } return dt.Rows[0][0].ToString(); } public bool IsReusable { get { return false; } } }
可惜的是,在ie7中显示不出来结果,但是在chrome、firefox和opera中倒是显示都正常,感兴趣的朋友可以对此加以完善。
希望本文所述对大家asp.net程序设计有所帮助。