C#.Net 分页显示类

 

using System;
using System.Web;
using System.Web.UI;
using System.Text.RegularExpressions;
using System.Text;

namespace Pub.Class
{ 
    /// <summary>
    /// 分页显示类
    /// </summary>
    public class Pager
    {
        #region 对齐方式 enum
        /// <summary>
        /// 对齐方式
        /// </summary>
        public enum Align { 
            /// <summary>
            /// 左对齐
            /// </summary>
            Left = 0, 
            /// <summary>
            /// 居中
            /// </summary>
            Center, 
            /// <summary>
            /// 右对齐
            /// </summary>
            Right
        }
        #endregion

        #region 私有成员
        private string _Url;
        private int _PageIndex;
        private int _TotalPage;
        private int _PageSize;
        private int _TotalRecord;
        private string _StyleName;
        private Align _Align;
        private int _Index=1;
        private StringBuilder sbData = new StringBuilder();
        #endregion

        #region 属性
        /// <summary>
        /// URL
        /// </summary>
        public string Url { set { _Url = value; } }
        /// <summary>
        /// 当前页
        /// </summary>
        public int PageIndex { set { _PageIndex = value; } }
        /// <summary>
        /// 总页
        /// </summary>
        public int TotalPage { set { _TotalPage = value; } }
        /// <summary>
        /// 页大小
        /// </summary>
        public int PageSize { set { _PageSize = value; } }
        /// <summary>
        /// 总记录
        /// </summary>
        public int TotalRecord { set {  _TotalRecord = value; } }
        /// <summary>
        /// 样式
        /// </summary>
        public string StyleName { set { _StyleName = value; } }
        /// <summary>
        /// 对齐方式
        /// </summary>
        public Align HAlign { set { _Align = value; } }
        /// <summary>
        /// 索引
        /// </summary>
        public int Index { set { _Index = value; } }
        #endregion

        #region 构造函数
        /// <summary>
        /// 构造函数
        /// </summary>
        public Pager()
        {
            this._Url = "";
            this._PageIndex = 1;
            this._TotalPage = 1;
            this._PageSize = 20;
            this._TotalRecord = 0;
            this._StyleName = "BasePager";
            this._Align = Align.Left;
        }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="Url">URL</param>
        /// <param name="PageIndex">当前页</param>
        /// <param name="TotalPage">总页</param>
        /// <param name="PageSize">页大小</param>
        /// <param name="TotalRecord">总记录数</param>
        /// <param name="StyleName">样式 默认BasePager</param>
        public Pager(string Url, int PageIndex, int TotalPage, int PageSize, int TotalRecord, string StyleName)
        {
            this._Url = Url;
            this._PageIndex = PageIndex;
            this._TotalPage = TotalPage;
            this._PageSize = PageSize;
            this._TotalRecord = TotalRecord;
            this._StyleName = StyleName;
        }
        #endregion

        #region 填充Html代码 生成分页代码
        /// <summary>
        /// 填充Html代码
        /// </summary>
        /// <param name="Page">当前page</param>
        /// <param name="CtrlID">输出到哪个HTML控件中</param>
        public void SetData(System.Web.UI.Page Page,string CtrlID)
        {
            _TotalPage = _TotalRecord / _PageSize;
            if (_TotalRecord % _PageSize != 0) _TotalPage++;
            sbData.Remove(0,sbData.Length);
            sbData.Append("var myPager" + _Index.ToString() + " = new " + this._StyleName + "();\n");
            sbData.Append("myPager" + _Index.ToString() + ".setUrl(\"" + _Url + "\");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setPageIndex(" + _PageIndex.ToString() + ");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setTotalPage(" + _TotalPage.ToString() + ");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setPageSize(" + _PageSize.ToString() + ");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setTotalRecord(" + _TotalRecord.ToString() + ");\n");
            string _str = "";
            switch (this._Align) { 
                case Align.Left: _str = "left"; break;
                case Align.Center: _str = "center"; break;
                case Align.Right: _str = "right"; break;
            }
            sbData.Append("myPager" + _Index.ToString() + ".setAlign(\"" + _str + "\");\n");
            sbData.Append("myPager" + _Index.ToString() + ".Execute(\"" + CtrlID + "\");\n");
            Js.Run(Page,sbData.ToString(),false,"Js" + _Index.ToString());
        }
        /// <summary>
        /// 取分页JS代码
        /// </summary>
        /// <param name="CtrlID">输出到哪个HTML控件中</param>
        public string GetData(string CtrlID)
        {
            _TotalPage = _TotalRecord / _PageSize;
            if (_TotalRecord % _PageSize != 0) _TotalPage++;
            sbData.Remove(0,sbData.Length);
            sbData.Append("var myPager" + _Index.ToString() + " = new " + this._StyleName + "();\n");
            sbData.Append("myPager" + _Index.ToString() + ".setUrl(\"" + _Url + "\");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setPageIndex(" + _PageIndex.ToString() + ");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setTotalPage(" + _TotalPage.ToString() + ");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setPageSize(" + _PageSize.ToString() + ");\n");
            sbData.Append("myPager" + _Index.ToString() + ".setTotalRecord(" + _TotalRecord.ToString() + ");\n");
            string _str = "";
            switch (this._Align) { 
                case Align.Left: _str = "left"; break;
                case Align.Center: _str = "center"; break;
                case Align.Right: _str = "right"; break;
            }
            sbData.Append("myPager" + _Index.ToString() + ".setAlign(\"" + _str + "\");\n");
            sbData.Append("myPager" + _Index.ToString() + ".Execute(\"" + CtrlID + "\");\n");
            return sbData.ToString();
        }
        #endregion

        /// <summary>
        /// 生成分页HTML代码
        /// </summary>
        /// <param name="curPage">当前页</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">URL</param>
        /// <param name="extendPage">输出页数</param>
        /// <returns></returns>
        public static string GetPager(int curPage, int countPage, string url, int extendPage) {
            if (countPage<=1) return "";
   
            int startPage = 1;
   int endPage = 1;
   string t1 = "<a href=\"" + string.Format(url,1) + "\">&laquo;</a>&nbsp;";
   string t2 = "<a href=\"" + string.Format(url,countPage) + "\">&raquo;</a>&nbsp;";
   if(countPage < 1) countPage = 1;
   if(extendPage < 3) extendPage = 2;
   if(countPage > extendPage) {
    if(curPage - (extendPage / 2) > 0) {
     if(curPage + (extendPage / 2) < countPage) {
      startPage = curPage - (extendPage / 2);
      endPage = startPage + extendPage - 1;
     } else {
      endPage = countPage;
      startPage = endPage - extendPage + 1;
      t2 = "";
     }
    } else {
     endPage = extendPage;
     t1 = "";
    }
   } else {
    startPage = 1;
    endPage = countPage;
    t1 = "";
    t2 = "";
   }
   System.Text.StringBuilder s = new System.Text.StringBuilder("");
   s.Append(t1);
   for (int i = startPage; i <= endPage; i++) {
    if (i == curPage) {
     s.Append("&nbsp;<span>");
     s.Append(i);
     s.Append("</span>&nbsp;");
    } else {
     s.Append("&nbsp;<a href=\"");
     s.Append(string.Format(url,i));
     s.Append("\">");
     s.Append(i);
     s.Append("</a>&nbsp;");
    }
   }
   s.Append(t2);
   return s.ToString();
        }
    }
}