求datagridview分页代码
如题，我使用的数据库是sql2000，我不能改数据库，暂不能使用分页存储过程。
数据量在100W以上.有连接查询。
能不能单个SQL语句就搞定。2000没有ROW_NUMBER函数，貌似是用count？
急用。
[解决办法]
绑定到 datagridview 在分页还是直接在数据库分页
[解决办法]
http://www.cnblogs.com/kevin-top/archive/2010/01/05/1639448.html
我只会这个。。帮你找到代码。。这个符合你的要求不
[解决办法]
http://blog.csdn.net/nileel/article/details/2509028
[解决办法]
我只知道写查询语句的时候用top n，n是绑定数据的函数的一个变量。界面上有 上一页、下一页、转到、最后一页等等按钮，点击按钮执行绑定数据库的函数
[解决办法]
SELECT TOP 页大小 *
FROM table1
WHERE id >
(
SELECT ISNULL(MAX(id),0)
FROM
(
SELECT TOP 页大小*(页数-1) id FROM table1 ORDER BY id
) A
)
ORDER BY id
[解决办法]
我最近用的分页sql，不过一定要指定主键，top max分页效率还是挺不错的
/// <summary> /// 生成top max分页sql语句，支持多表联查(事理) /// </summary> /// <param name="tableName">表名</param> /// <param name="fields">字段</param> /// <param name="primaryKey">主键</param> /// <param name="pageSize">一页显示多少条</param> /// <param name="currentPage">当前页数</param> /// <param name="where">where条件，无需加where</param> /// <param name="orderBy">order by条件，无需加order by</param> /// <returns>分页sql语句</returns> public static string GetDataPaginationSql(string tableName, string fields, string primaryKey, int pageSize, int currentPage, string where, string orderBy) { //SELECT TOP 10 UserId,AddUserId,Term,SchoolYear FROM SL_StudentsCQECDetail //WHERE CQECId > //( // SELECT MAX(CQECId) FROM // ( // SELECT TOP 10 CQECId FROM SL_StudentsCQECDetail where UserId=479 ORDER BY CQECId // ) AS T //) //and UserId=479 //order by UserId if (currentPage > 0) currentPage--; StringBuilder sql = new StringBuilder(); sql.Append("SELECT TOP " + pageSize + " " + fields + " FROM " + tableName); if (currentPage == 0) { if (!string.IsNullOrEmpty(where)) sql.Append(" WHERE " + where); } else { sql.Append(" WHERE " + primaryKey + ">"); sql.Append("(SELECT MAX(" + primaryKey + ") FROM "); sql.Append("(SELECT TOP " + pageSize * currentPage + " " + primaryKey + " FROM " + tableName); if (!string.IsNullOrEmpty(where)) sql.Append(" WHERE " + where); sql.Append(" ORDER BY " + primaryKey + ") AS T)"); if (!string.IsNullOrEmpty(where)) sql.Append(" AND " + where); } if (!string.IsNullOrEmpty(orderBy)) sql.Append(" ORDER BY " + orderBy); return sql.ToString(); }
[解决办法]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using HxwcBLL;
namespace HxwcWebUI
{
public partial class IntroductionInfo : System.Web.UI.Page
{
/// <summary>
/// 当前页数
/// </summary>
protected int cPage;
/// <summary>
/// 总共有多少页
/// </summary>
protected int pCount;
/// <summary>
/// 总共有多少条记录
/// </summary>
protected int rCount;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindDataList(1);
}
}
/// <summary>
/// 为DataList绑定数据
/// </summary>
/// <param name="pageNum">要查看的页数</param>
protected void BindDataList(int pageNum)
{
cPage = pageNum;
ProductInfoBLL bll = new ProductInfoBLL();
int pageCount = 0; //表示总页数
int recordCount = 0; //表示数据的总条数
this.IntroductionList.DataSource = bll.GetBindList(5, pageNum, ref pageCount, ref recordCount);
this.IntroductionList.DataBind();
pCount = pageCount;
rCount = recordCount;
}
/// <summary>
/// 对简介内容进行截取
/// </summary>
/// <param name="txt"></param>
/// <param name="length"></param>
/// <returns></returns>
protected string CutString(string txt, int length)
{
if (txt.Length > length)
{
return txt.Substring(0, length) + "....";
}
else
{
return txt;
}
}
/// <summary>
/// 上一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void prePage_Click(object sender, EventArgs e)
{
int prePage = Convert.ToInt32(Request.Form["cPage"]) - 1;
if (prePage < 1)
{
prePage = 1;
}
BindDataList(prePage);
}
/// <summary>
/// 下一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void nextPage_Click(object sender, EventArgs e)
{
int prePage = Convert.ToInt32(Request.Form["cPage"]) + 1;
pCount = Convert.ToInt32(Request.Form["pCount"]);
if (prePage > pCount)
{
prePage = pCount;
}
BindDataList(prePage);
}
/// <summary>
/// 跳转到第一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Button1_Click(object sender, EventArgs e)
{
BindDataList(1);
}
/// <summary>
/// 跳转到最后一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Button2_Click(object sender, EventArgs e)
{
BindDataList(Convert.ToInt32(Request.Form["pCount"]));
}
}
}
------解决方案--------------------
/* Function: SuperPaging* Description:* 2000高效性能分页* Example:* SuperPaging @TableName='表名',@Orderfld='排序列名' */CREATE PROCEDURE SupesoftPage(@TableName nvarchar(50), -- 表名@ReturnFields nvarchar(2000) = '*', -- 需要返回的列 @PageSize int = 10, -- 每页记录数@PageIndex int = 1, -- 当前页码@Where nvarchar(2000) = '', -- 查询条件@Orderfld nvarchar(2000), -- 排序字段名 最好为唯一主键@OrderType int = 1 -- 排序类型 1:降序 其它为升序)ASDECLARE @TotalRecord intDECLARE @TotalPage intDECLARE @CurrentPageSize intDECLARE @TotalRecordForPageIndex intDECLARE @OrderBy nvarchar(255)DECLARE @CutOrderBy nvarchar(255)if @OrderType = 1BEGINset @OrderBy = ' Order by ' + REPLACE(@Orderfld,',',' desc,') + ' desc 'set @CutOrderBy = ' Order by '+ REPLACE(@Orderfld,',',' asc,') + ' asc 'ENDelseBEGINset @OrderBy = ' Order by ' + REPLACE(@Orderfld,',',' asc,') + ' asc 'set @CutOrderBy = ' Order by '+ REPLACE(@Orderfld,',',' desc,') + ' desc ' END-- 记录总数declare @countSql nvarchar(4000) set @countSql='SELECT @TotalRecord=Count(*) From '+@TableName+' '+@Whereexecute sp_executesql @countSql,N'@TotalRecord int out',@TotalRecord outSET @TotalPage=(@TotalRecord-1)/@PageSize+1SET @CurrentPageSize=@PageSizeIF(@TotalPage=@PageIndex)BEGINSET @CurrentPageSize=@TotalRecord%@PageSizeIF(@CurrentPageSize=0)SET @CurrentPageSize=@PageSizeEND-- 返回记录set @TotalRecordForPageIndex=@PageIndex*@PageSizeexec('SELECT * FROM(SELECT TOP '+@CurrentPageSize+' * FROM(SELECT TOP '+@TotalRecordForPageIndex+' '+@ReturnFields+'FROM '+@TableName+' '+@Where+' '+@OrderBy+') TB2'+@CutOrderBy+') TB3'+@OrderBy)-- 返回总页数和总记录数SELECT @TotalPage as PageCount,@TotalRecord as RecordCountGO
[解决办法]
{
int nStartPos = 0; //当前页面开始记录行
int nEndPos = 0; //当前页面结束记录行
DataTable dtTemp = dtInfo.Clone(); //克隆DataTable结构框架
if (pageCurrent == pageCount)
{
nEndPos = nMax;
}
else
{
nEndPos = pageSize * pageCurrent;
}
nStartPos = nCurrent;
lblPageCount.Text = pageCount.ToString();
txtCurrentPage.Text = Convert.ToString(pageCurrent);
//从元数据源复制记录行
for (int i = nStartPos; i < nEndPos; i++)
{
dtTemp.ImportRow(dtInfo.Rows[i]);
nCurrent++;
}
bdsInfo.DataSource = dtTemp;
bdnInfo.BindingSource = bdsInfo;
dgvInfo.DataSource = bdsInfo;
}
// 4、菜单响应事件：
private void bdnInfo_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
if (e.ClickedItem.Text == "关闭")
{
this.Close();
}
if (e.ClickedItem.Text == "上一页")
{
pageCurrent--;
if (pageCurrent <= 0)
{
MessageBox.Show("已经是第一页，请点击“下一页”查看！");
return;
}
else
{
nCurrent = pageSize * (pageCurrent - 1);
}
LoadData();
}
if (e.ClickedItem.Text == "下一页")
{
pageCurrent++;
if (pageCurrent > pageCount)
{
MessageBox.Show("已经是最后一页，请点击“上一页”查看！");
return;
}
else
{
nCurrent=pageSize*(pageCurrent-1);
}
LoadData();
}
}