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=data&index=\" + 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=data&index=\" + 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。
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