自己寫分頁算法

我這裡封裝在用戶控件裡。你也可以封裝在類文件中。自己定義：
[csharp] 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Text; 
 
namespace HHWeb.UserControl 
{ 
    public partial class Paging : System.Web.UI.UserControl 
    { 
        public StringBuilder PagingControlInfo = new StringBuilder(); 
        protected void Page_Load(object sender, EventArgs e) 
        { 
            GetPaging(); 
        } 
        void GetPaging() 
        { 
            //判斷如果當前頁為負數或者零時，NowPage=1 
            if (NowPage <= 0) 
                NowPage = 1; 
            //判斷如果當前頁大於總頁數時，NowPage=PageCount 
            int PageCount = GetPageCount(); 
            if (NowPage > PageCount) 
                NowPage = PageCount; 
            //首頁和上一頁（） 
            if (NowPage != 1) 
            { 
                PagingControlInfo.Append("<a href=\""+PageName+"?NowPage=1\">首頁</a>"); 
                PagingControlInfo.Append("<a href=\""+PageName+"?NowPage=" + (NowPage - 1) + "\">上一頁</a>"); 
            } 
            //如果分頁總頁數小於頁碼數（PageNumber）時，不顯示省略號(...) 
            if (PageCount <= PageNumber) 
            { 
                for (int i = 1; i <= PageCount; i++) 
                    GetPageNumberStr(i); 
            } 
            else 
            { 
                if (PageNumber % 2 != 0) 
                { 
                    LeftPageNumberOne = (PageNumber / 2) + 1; 
                    LeftPageNumberTwo = (PageNumber / 2); 
                    RightPageNumber = (PageNumber / 2); 
                } 
                else 
                { 
                    LeftPageNumberOne = (PageNumber / 2) + 1; 
                    LeftPageNumberTwo = (PageNumber / 2); 
                    RightPageNumber = (PageNumber / 2) - 1; 
                } 
                //總頁數大於頁碼數（PageNumber）時（簡單處理--算法） 
                if (NowPage > LeftPageNumberOne && NowPage < PageCount - RightPageNumber) 
                { 
                    PagingControlInfo.Append("<span>...</span>"); 
                    for (int i = NowPage - LeftPageNumberTwo; i <= NowPage + RightPageNumber; i++) 
                        GetPageNumberStr(i); 
                    PagingControlInfo.Append("<span>...</span>"); 
                } 
                else if (NowPage >= PageCount - RightPageNumber) 
                { 
                    PagingControlInfo.Append("<span>...</span>"); 
                    for (int i = (PageCount - PageNumber) + 1; i <= PageCount; i++) 
                        GetPageNumberStr(i); 
                } 
                else 
                { 
                    for (int i = 1; i <= PageNumber; i++) 
                        GetPageNumberStr(i); 
                    PagingControlInfo.Append("<span>...</span>"); 
                } 
            } 
            //下一頁和末頁 
            if (NowPage != PageCount) 
            { 
                PagingControlInfo.Append("<a href=\""+PageName+"?NowPage=" + (NowPage + 1) + "\">下一頁</a>"); 
                PagingControlInfo.Append("<a href=\""+PageName+"?NowPage=" + PageCount + "\">末頁</a>"); 
            } 
        } 
 
        #region //拼接頁碼方法 
        public void GetPageNumberStr(int i) 
        { 
            if (i == NowPage) 
                PagingControlInfo.Append("<a href=\""+PageName+"?NowPage="+i+"\" style=\"border:0px;color:#ff5a00 ;\">" + i + "</a>"); 
            else 
                PagingControlInfo.Append("<a href=\""+PageName+"?NowPage=" + i + "\">" + i + "</a>"); 
        } 
        #endregion 
 
        #region //計算總頁數 
        public int GetPageCount() 
        { 
            if (PageSize == 0) 
                PageSize = 20;//每頁顯示的記錄條數為"0",則默認為"20" 
            if (Totalcount % PageSize == 0) 
                return (Totalcount / PageSize); 
            else 
                return (Totalcount / PageSize) + 1; 
        } 
        #endregion 
 
        #region //分頁必須提供的基本屬性 
        /// <summary> 
        /// 當前頁 
        /// </summary> 
        public int NowPage { get; set; } 
        /// <summary> 
        /// 每頁顯示的記錄條數 
        /// </summary> 
        public int PageSize { get; set; } 
        /// <summary> 
        /// 總條數 
        /// </summary> 
        public int Totalcount { get; set; } 
        /// <summary> 
        /// 頁碼（意思是前台分頁控件顯示的頁數） 
        /// </summary> 
        public int PageNumber { get; set; } 
        /// <summary> 
        /// 當前頁面名稱如:"index.aspx" 
        /// </summary> 
        public string PageName { get;set;} 
        #endregion 
 
        #region //分頁基本屬性 
        /// <summary> 
        /// 左頁碼屬性一 
        /// </summary> 
        public int LeftPageNumberOne { get; set; } 
        /// <summary> 
        /// 左頁碼屬性二 
        /// </summary> 
        public int LeftPageNumberTwo { get; set; } 
        /// <summary> 
        /// 右頁碼 
        /// </summary> 
        public int RightPageNumber { get; set; } 
         #endregion 
    } 
} 

效果如下：自己給一下分頁樣式就Ok了。www.2cto.com

 作者：yfz19890410