ASP.NET和MSSQL高性能分页

set ANSI_NULLS ONset QUOTED_IDENTIFIER ONGO-- =============================================-- Author: Clear-- Description: 高性能分页-- http://www.VEVb.com/roucheng/-- =============================================Alter PROCEDURE [dbo].[Tag_Page_Name_Select]-- 传入最大显示纪录数和当前页码    @MaxPageSize int,    @PageNum int,-- 设置一个输出参数返回总纪录数供分页列表使用    @Count int outputASBEGIN    SET NOCOUNT ON;  DECLARE-- 定义排序名称参数        @Name nvarchar(50),-- 定义游标位置        @Cursor int-- 首先得到纪录总数  Select @Count = count(tag_Name)    FROM [viewdatabase0716].[dbo].[view_tag];-- 定义游标需要开始的位置    Set @Cursor = @MaxPageSize*(@PageNum-1)+1-- 如果游标大于纪录总数将游标放到最后一页开始的位置    IF @Cursor > @Count    BEGIN-- 如果最后一页与最大每次纪录数相等，返回最后整页        IF @Count % @MaxPageSize = 0        BEGIN            IF @Cursor > @MaxPageSize                Set @Cursor = @Count - @MaxPageSize + 1            ELSE                Set @Cursor = 1        END-- 否则返回最后一页剩下的纪录        ELSE            Set @Cursor = @Count - (@Count % @MaxPageSize) + 1    END-- 将指针指到该页开始    Set Rowcount @Cursor-- 得到纪录开始的位置    Select @Name = tag_Name    FROM [viewdatabase0716].[dbo].[view_tag]    orDER BY tag_Name;-- 设置开始位置    Set Rowcount @MaxPageSize-- 得到该页纪录        Select *         From [viewdatabase0716].[dbo].[view_tag]        Where tag_Name >= @Name        order By tag_Name    Set Rowcount 0END

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.Text;/// <summary>/// 扩展连接字符串/// </summary>public class ExStringBuilder{    private StringBuilder InsertString;    private StringBuilder PageString;    private int PrivatePageNum = 1;    private int PrivateMaxPageSize = 25;    private int PrivateMaxPages = 10;    private int PrivateCount;    private int PrivateAllPage;    public ExStringBuilder()    {        InsertString = new StringBuilder("");    }    /// <summary>    /// 得到生成的HTML    /// </summary>    public string GetHtml    {        get        {            return InsertString.ToString();        }    }    /// <summary>    /// 得到生成的分页HTML    /// </summary>    public string GetPageHtml    {        get        {            return PageString.ToString();        }    }    /// <summary>    /// 设置或获取目前页数    /// </summary>    public int PageNum    {        get        {            return PrivatePageNum;        }        set        {            if (value >= 1)            {                PrivatePageNum = value;            }        }    }    /// <summary>    /// 设置或获取最大分页数    /// </summary>    public int MaxPageSize    {        get        {            return PrivateMaxPageSize;        }        set        {            if (value >= 1)            {                PrivateMaxPageSize = value;            }        }    }    /// <summary>    /// 设置或获取每次显示最大页数    /// </summary>    public int MaxPages    {        get        {            return PrivateMaxPages;        }        set        {            PrivateMaxPages = value;        }    }    /// <summary>    /// 设置或获取数据总数    /// </summary>    public int DateCount    {        get        {            return PrivateCount;        }        set        {            PrivateCount = value;        }    }    /// <summary>    /// 获取数据总页数    /// </summary>    public int AllPage    {        get        {            return PrivateAllPage;        }    }    /// <summary>    /// 初始化分页    /// </summary>    public void Pagination()    {        PageString = new StringBuilder("");//得到总页数        PrivateAllPage = (int)Math.Ceiling((decimal)PrivateCount / (decimal)PrivateMaxPageSize);//防止上标或下标越界        if (PrivatePageNum > PrivateAllPage)        {            PrivatePageNum = PrivateAllPage;        }//滚动游标分页方式        int LeftRange, RightRange, LeftStart, RightEnd;        LeftRange = (PrivateMaxPages + 1) / 2-1;        RightRange = (PrivateMaxPages + 1) / 2;        if (PrivateMaxPages >= PrivateAllPage)        {            LeftStart = 1;            RightEnd = PrivateAllPage;        }        else        {            if (PrivatePageNum <= LeftRange)            {                LeftStart = 1;                RightEnd = LeftStart + PrivateMaxPages - 1;            }            else if (PrivateAllPage - PrivatePageNum < RightRange)            {                RightEnd = PrivateAllPage;                LeftStart = RightEnd - PrivateMaxPages + 1;            }            else            {                LeftStart = PrivatePageNum - LeftRange;                RightEnd = PrivatePageNum + RightRange;            }        }//生成页码列表统计        PageString.Append(...);        StringBuilder PreviousString = new StringBuilder("");//如果在第一页        if (PrivatePageNum > 1)        {            ...        }        else        {            ...        }//如果在第一组分页        if (PrivatePageNum > PrivateMaxPages)        {            ...        }        else        {            ...        }        PageString.Append(PreviousString);//生成中间页 http://www.VEVb.com/roucheng/        for (int i = LeftStart; i <= RightEnd; i++)        {//为当前页时            if (i == PrivatePageNum)            {                ...            }            else            {                ...            }        }        StringBuilder LastString = new StringBuilder("");//如果在最后一页        if (PrivatePageNum < PrivateAllPage)        {            ...        }        else        {            ...        }//如果在最后一组        if ((PrivatePageNum + PrivateMaxPages) < PrivateAllPage)        {            ...        }        else        {            ...        }        PageString.Append(LastString);    }    /// <summary>    /// 生成Tag分类表格    /// </summary>    public void TagTable(ExDataRow myExDataRow)    {        InsertString.Append(...);    }

//得到分页设置并放入session        ExRequest myExRequest = new ExRequest();        myExRequest.PageSession("Tag_", new string[] { "page", "size" });//生成Tag分页        ExStringBuilder Tag = new ExStringBuilder();        //设置每次显示多少条纪录        Tag.MaxPageSize = Convert.ToInt32(Session["Tag_size"]);        //设置最多显示多少页码        Tag.MaxPages = 9;        //设置当前为第几页        Tag.PageNum = Convert.ToInt32(Session["Tag_page"]);        string[][] myNamenValue = new string[2][]{            new string[]{"MaxPageSize","PageNum","Count"},            new string[]{Tag.MaxPageSize.ToString(),Tag.PageNum.ToString()}        };//调用存储过程        DataTable myDataTable = MySQL.BatchGetDB("Tag_Page_Name_Select", myNamenValue, "Count");        Tag.DateCount = (int)mySQL.OutputCommand.Parameters["@Count"].Value;        Tag.Pagination();        HeadPage.InnerHtml = FootPage.InnerHtml = Tag.GetPageHtml;        for (int i = 0, j = myDataTable.Rows.Count; i < j; i++)        {            Tag.TagTable(new ExDataRow(myDataTable.Rows));        }        TagBox.InnerHtml = Tag.GetHtml;