books_commonbypage.cs

简单的图书管理系统

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using KeYou.Books.DB;
namespace KeYou.Books.DL
{
    public class books_CommonByPage
    {
        public DataSet GetListByPage(string tblName, string fldName, string strWhere, string ID, string Sort, int PageSize, int Page)
        {

            SqlParameter[] parameters ={
               new SqlParameter("@tblName",SqlDbType.VarChar,200),
               new SqlParameter("@fldName",SqlDbType.VarChar,200),
               new SqlParameter("@strWhere",SqlDbType.VarChar,500),
               new SqlParameter("@ID",SqlDbType.VarChar,20),
               new SqlParameter("@Sort",SqlDbType.VarChar,100),
               new SqlParameter("PageSize",SqlDbType.Int,4),
               new SqlParameter("Page",SqlDbType.Int,4)};

            parameters[0].Value = tblName;
            parameters[1].Value = fldName;
            parameters[2].Value = strWhere;
            parameters[3].Value = ID;
            parameters[4].Value = Sort;
            parameters[5].Value = PageSize;
            parameters[6].Value = Page;

            return DbHelperSQL.RunProcedure("UP_CommomDataByPage", parameters, "ds");

        }

        public bool isNumber(string s)
        {
            int Flag = 0;
            char[] str = s.ToCharArray();
            for (int i = 0; i < str.Length; i++)
            {
                if (Char.IsNumber(str[i]))
                {
                    Flag++;
                }
                else
                {
                    Flag = -1;
                    break;
                }
            }
            if (Flag > 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        /// </summary>
        /// 对文本内容实现分页
        /// <param name="total">总记录数</param>
        /// <param name="per">每页记录数</param>
        /// <param name="page">当前页数</param>
        /// <param name="query_string">Url参数</param>
        /// <param name="ID">参数</param>
        /// <param name="currentpage">当前页</param>
        /// <param name="PageSize">每页分页大小</param>
        public string pagination(int total, int per, int page, string query_string, int ID, int currentpage, int PageSize)
        {
            int allpage = 0;
            int next = 0;
            int pre = 0;
            int startcount = 0;
            int endcount = 0;
            string pagestr = "";
            if (page < 1) { page = 1; }
            //计算总页数
            if (per != 0)
            {
                allpage = (total / per);
                allpage = ((total % per) != 0 ? allpage + 1 : allpage);
                allpage = (allpage == 0 ? 1 : allpage);
            }
            next = page + 1;
            pre = page - 1;
            startcount = (page + 5) > allpage ? allpage - 9 : page - 4;//中间页起始序号
            //中间页终止序号
            endcount = page < 5 ? 10 : page + 5;
            if (startcount < 1) { startcount = 1; } //为了避免输出的时候产生负数，设置如果小于1就从序号1开始
            if (allpage < endcount) { endcount = allpage; }//页码+5的可能性就会产生最终输出序号大于总页码，那么就要将其控制在页码数之内
            // pagestr = "共<font color=\"green\">" + allpage + "</font>页&nbsp;共有<font color=\"green\">" + total + "</font>条记录&nbsp;当前页<font color=\"green\">" + currentpage + "</font>/" + allpage + "&nbsp;每页<font color=\"green\">" + PageSize + "</font>条&nbsp;";

            pagestr += page > 1 ? "<a href=\"" + query_string + "&page=1\">首&nbsp页</a>&nbsp;<a href=\"" + query_string + "&page=" + pre + "\">上一页</a>" : "首&nbsp页 上一页";
            //中间页处理，这个增加时间复杂度，减小空间复杂度
            for (int i = startcount; i <= endcount; i++)
            {
                pagestr += page == i ? "&nbsp;<font color=\"green\">" + i + "</font>" : "&nbsp;<a href=\"" + query_string + "&page=" + i + "\">" + i + "</a>";
            }
            pagestr += page != allpage ? "&nbsp;<a href=\"" + query_string + "&page=" + next + "\">下一页</a>&nbsp;<a href=\"" + query_string + "&page=" + allpage + "\">尾&nbsp页</a>" : " 下一页 尾&nbsp页";
            pagestr += "<br>" + "共<font color=\"green\">" + allpage + "</font>页&nbsp;共有<font color=\"green\">" + total + "</font>条记录&nbsp;当前页<font color=\"green\">" + currentpage + "</font>/" + allpage + "&nbsp;每页<font color=\"green\">" + PageSize + "</font>条&nbsp;";

            return pagestr;
        }

    }
}