DataGrid快速分页
cs:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Data.SqlClient;
public partial class user_shiyan2 : System.Web.UI.Page
{
private static int intRecordCount; //记录总数
private static int intPageCount; //总页数
private static int intCurrentPageIndex; //当前页码
private DataView dv;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//将当前页面置为1，即显示第一页的记录
intCurrentPageIndex = 1;
//设置属性
// DataGrid1.AllowPaging = "True";
DataGrid1.AllowPaging = true;
// DataGrid1AllowCustomPaging = "True";
DataGrid1.AllowCustomPaging = true;
//绑定数据(Bind()是一个自定义方法)
this.Bind(intCurrentPageIndex);
}
}
private void Bind(int intCurrentPageIndex)
{
string strConn = ConfigurationSettings.AppSettings["Str_sql"].ToString();
//每次只取出一页（即10条）数据的SQL语句
string strSql = "select top 10 * from attorn where attorn_id not in (select top " + ( intCurrentPageIndex - 1)*10 + " attorn_id from attorn)";
if (TextBox1.Text != null && TextBox1.Text != "")
{
strSql = "select top 10 * from attorn where attorn_id not in (select top " + (intCurrentPageIndex - 1) * 10 + " attorn_id from attorn where [User_name] like '%" + TextBox1.Text + "%') and [User_name] like '%" + TextBox1.Text + "%'";
}
//得到总记录数的SQL语句
string strSqlCount = "select count(*) from attorn ";
if(TextBox1.Text != null && TextBox1.Text != "")
{
strSqlCount = "select count(*) from attorn where [User_name] like '%" + TextBox1.Text + "%'";
}
//建立与数据的连接
SqlConnection dbConnection = new SqlConnection(strConn);
dbConnection.Open();
//创建适配器的实例，并填充数据
SqlDataAdapter dsAdapter = new SqlDataAdapter(strSql,dbConnection);
DataSet ds = new DataSet();
dsAdapter.Fill(ds);
dv = ds.Tables[0].DefaultView;
//取得总记录数
SqlCommand cmd = new SqlCommand(strSqlCount,dbConnection);
intRecordCount = (Int32) cmd.ExecuteScalar();
//关闭连接
dbConnection.Close();
//计算总页数
double dblRecordCount;
dblRecordCount = System.Convert.ToDouble(intRecordCount);
intPageCount = (Int32)Math.Ceiling(dblRecordCount / 10);
Label1.Text = intCurrentPageIndex.ToString();
Label2.Text = intPageCount.ToString();
//绑定数据
DataGrid1.DataSource = dv;
DataGrid1.DataBind();
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
intCurrentPageIndex = 1;
//重新绑定数据
this.Bind(intCurrentPageIndex);
}
protected void LinkButton2_Click(object sender, EventArgs e)
{
intCurrentPageIndex = intCurrentPageIndex - 1;
if (intCurrentPageIndex <= 0)
{
intCurrentPageIndex = 1;
}
//重新绑定数据
this.Bind(intCurrentPageIndex);
}
protected void LinkButton3_Click(object sender, EventArgs e)
{
intCurrentPageIndex = intCurrentPageIndex + 1;
if(intCurrentPageIndex > intPageCount)
{
intCurrentPageIndex = intPageCount;
}
//重新绑定数据
this.Bind(intCurrentPageIndex);
}
protected void LinkButton4_Click(object sender, EventArgs e)
{
intCurrentPageIndex = intPageCount;
//重新绑定数据
this.Bind(intCurrentPageIndex);
}
protected void Button1_Click(object sender, EventArgs e)
{
intCurrentPageIndex = 1;
//重新绑定数据
this.Bind(intCurrentPageIndex);
}
}
aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="shiyan2.aspx.cs" Inherits="user_shiyan2" %>
<!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>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">LinkButton</asp:LinkButton>
<asp:LinkButton ID="LinkButton2" runat="server" OnClick="LinkButton2_Click">LinkButton</asp:LinkButton>
<asp:LinkButton ID="LinkButton3" runat="server" OnClick="LinkButton3_Click">LinkButton</asp:LinkButton>
<asp:LinkButton ID="LinkButton4" runat="server" OnClick="LinkButton4_Click">LinkButton</asp:LinkButton>
<asp:DataGrid ID="DataGrid1" runat="server">
</asp:DataGrid>
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div>
</form>
</body>
</html>
分页算法太复杂,让人看不懂, 让人看不懂的算法都不是好算法. 这个最简单:
select top @page*@pagesize * from @table where ID not in (select top (@page-1)* @pagesize ID from @table)
