具体不多说了,只贴出相关源码~
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.Web;
/**//// <summary>
/// 名称:access下的分页方案(仿sql存储过程)
/// 作者:cncxz(虫虫)
/// blog:http://cncxz.cnblogs.com
/// </summary>
public class AdoPager
"dbPath"] as string;
if (string.IsNullOrEmpty(str))
str = "~/App_Data/db.mdb";
m_ConnString = string.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data source=", HttpContext.Current.Server.MapPath(str));
"Provider=Microsoft.Jet.OLEDB.4.0;Data source=", dbPath);
m_Conn = new OleDbConnection(m_ConnString);
"," + dr.GetInt32(0);
"pageIndex">当前页码</param>
/// <param name="pageSize">分页容量</param>
/// <param name="showString">显示的字段</param>
/// <param name="queryString">查询字符串,支持联合查询</param>
/// <param name="whereString">查询条件,若有条件限制则必须以where 开头</param>
/// <param name="orderString">排序规则</param>
/// <param name="pageCount">传出参数:总页数统计</param>
/// <param name="recordCount">传出参数:总记录统计</param>
/// <returns>装载记录的DataTable</returns>
public DataTable ExecutePager(int pageIndex, int pageSize, string showString, string queryString, string whereString, string orderString, out int pageCount, out int recordCount)
"*";
if (string.IsNullOrEmpty(orderString)) orderString = "ID desc";
ConnOpen();
string myVw = string.Format(" ( ", queryString);
OleDbCommand cmdCount = new OleDbCommand(string.Format(" select count(0) as recordCount from ", myVw, whereString), m_Conn);
recordCount = Convert.ToInt32(cmdCount.ExecuteScalar());
if ((recordCount % pageSize) > 0)
pageCount = recordCount / pageSize + 1;
else
pageCount = recordCount / pageSize;
OleDbCommand cmdRecord;
if (pageIndex == 1)//第一页
"select top ", pageSize, showString, myVw, whereString, orderString), m_Conn);
"select top ", pageSize, showString, myVw, "where 1=2", orderString), m_Conn);
"select top ", pageLowerBound, "ID", myVw, whereString, orderString), pageUpperBound);
cmdRecord = new OleDbCommand(string.Format("select ", showString, myVw, recordIDs, orderString), m_Conn);
"C#" AutoEventWireup="true" CodeFile="Default.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>分页演示</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<br />
转到第<asp:TextBox ID="txtPageSize" runat="server" Width="29px">1</asp:TextBox>页<asp:Button ID="btnJump" runat="server" Text="Go" OnClick="btnJump_Click" /><br />
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" Width="90%">
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#EFF3FB" />
<EditRowStyle BackColor="#2461BF" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
</div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
</body>
</html>
示例的codebehind代码
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
public partial class _Default : System.Web.UI.Page
"select a.*,b.KindText from tableTest a left join tableKind b on a.KindCode=b.KindCode ";
string strShow = "ID,Subject,KindCode,KindText";
DataTable dt = m_Pager.ExecutePager(pageIndex, pageSize, strShow, strQuery, "", "ID desc", out pageCount, out recordCount);
GridView1.DataSource = dt;
GridView1.DataBind();
Label1.Text = string.Format("共",recordCount,pageSize,pageIndex,pageCount);
}
protected void btnJump_Click(object sender, EventArgs e)
{
int.TryParse(txtPageSize.Text, out pageIndex);
LoadData();
}
}
RTX 5090要首发 性能要翻倍!三星展示GDDR7显存
三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。
首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。
据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。