asp.net异步获取datatable并显示的实现方法
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2024-02-11 20:56:40
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...
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。