asp.net异步获取datatable并显示的实现方法_实用技巧_

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MethodOne.aspx.cs" Inherits="_Default" %>
查询结果
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当前发票库存情况
购买后一年(含)以上未验旧使用情况
管理机关
合计
机打发票
手工发票
冠名发票
其他
正常户
占库存户数的比率
非正常户
证件失效户
0
1
2
3
4
5
6
7=6/1
8
9
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<%@ 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(""); for (int i = 0; i < cLen; i++) { sb.Append(""); sb.Append(dt.Rows[j][i].ToString()); sb.Append(""); } sb.Append(""); } 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(""); for (int i = 0; i < cLen; i++) { sb.Append(""); sb.Append(dt.Rows[j][i].ToString()); sb.Append(""); } sb.Append(""); } 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; } } }