ztyzly00 2008-11-23
代码如下:
CREATE PROCEDURE p_pageList ( m_pageNo int , m_perPageCnt int , m_column varchar(1000) , m_table varchar(1000) , m_condition varchar(1000), m_orderBy varchar(200) , out m_totalPageCnt int ) BEGIN SET @pageCnt = 1; -- 总记录数 SET @limitStart = (m_pageNo - 1)*m_perPageCnt; SET @limitEnd = m_perPageCnt; SET @sqlCnt = CONCAT('select count(1) into @pageCnt from ',m_table); -- 这条语句很关键,用来得到总数值 SET @sql = CONCAT('select ',m_column,' from ',m_table); IF m_condition IS NOT NULL AND m_condition <> '' THEN SET @sql = CONCAT(@sql,' where ',m_condition); SET @sqlCnt = CONCAT(@sqlCnt,' where ',m_condition); END IF; IF m_orderBy IS NOT NULL AND m_orderBy <> '' THEN SET @sql = CONCAT(@sql,' order by ',m_orderBy); END IF; SET @sql = CONCAT(@sql, ' limit ', @limitStart, ',', @limitEnd); PREPARE s_cnt from @sqlCnt; EXECUTE s_cnt; DEALLOCATE PREPARE s_cnt; SET m_totalPageCnt = @pageCnt; PREPARE record from @sql; EXECUTE record; DEALLOCATE PREPARE record; END
代码如下:
/// <summary> /// 分页显示 /// </summary> /// <param name="conn">连接数据库字符串</param> /// <param name="perPage">每页显示条数</param> /// <param name="columnList">查询的字段字符</param> /// <param name="tableName">查询的表名</param> /// <param name="condition">where条件(不用写where)</param> /// <param name="orderStr">排序条件(不用写order by)</param> /// <param name="pageInfo">返回页码的数组,0,1,2,3分别为 总记录集数,总页数,上一页,下一页,4开始为页码</param> /// <returns>此页的数据记录集</returns> public static DataTable PageList(string conn, int perPage, string url, string columnList, string tableName, string condition, string orderStr, out string[] pageInfo) { int pageNo = 1; //当前页码 int totalCnt = 1; //记录集总数 int pageCnt = 0; //总页数 DataTable dt = new DataTable(); //用于返回的DataTable using (MySqlConnection myConn = new MySqlConnection(conn)) { MySqlDataAdapter adp = new MySqlDataAdapter(); MySqlCommand cmd = new MySqlCommand(); if (!string.IsNullOrEmpty(System.Web.HttpContext.Current.Request["pageNo"])) { try { pageNo = int.Parse(System.Web.HttpContext.Current.Request["pageNo"].ToString()); } finally { } }//得到当前页面值 cmd.Connection = myConn; myConn.Open(); cmd.CommandText = "p_pageList"; cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("m_pageNo", MySqlDbType.Int32, 11); cmd.Parameters.Add("m_perPageCnt", MySqlDbType.Int32, 11); cmd.Parameters.Add("m_column", MySqlDbType.VarChar, 1000); cmd.Parameters.Add("m_table", MySqlDbType.VarChar, 1000); cmd.Parameters.Add("m_condition", MySqlDbType.VarChar, 1000); cmd.Parameters.Add("m_orderBy", MySqlDbType.VarChar, 200); cmd.Parameters.Add("m_totalCnt", MySqlDbType.Int32, 11); cmd.Parameters["m_pageNo"].Value = pageNo; cmd.Parameters["m_perPageCnt"].Value = perPage; cmd.Parameters["m_column"].Value = columnList; cmd.Parameters["m_table"].Value = tableName; cmd.Parameters["m_condition"].Value = condition; cmd.Parameters["m_orderBy"].Value = orderStr; cmd.Parameters["m_totalCnt"].Direction = ParameterDirection.Output; cmd.ExecuteNonQuery(); adp.SelectCommand = cmd; adp.Fill(dt); totalCnt = int.Parse(cmd.Parameters["m_totalCnt"].Value.ToString()); } pageCnt = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(totalCnt) / perPage)); if (pageNo > pageCnt) { pageNo = pageCnt; }//如果当前页码大于总页数,则当前页为最后一页 //处理页码地址参数 string pageNumLink = string.Empty; //页码的链接地址 if (string.IsNullOrEmpty(url.Trim())) { pageNumLink = "<a href=\"?pageNo="; } else if (url.IndexOf('?') >= 0) { pageNumLink = "<a href=\"" + url + "&pageNo="; } else { pageNumLink = "<a href=\"" + url + "?pageNo="; } //上一页,下一页字符串赋值 string abovePage = pageNumLink + (pageNo-1).ToString()+ "\">上一页</a>"; string nextPage = pageNumLink + (pageNo + 1).ToString() + "\">下一页</a>"; if (pageNo == 1) { abovePage = string.Empty; }//如果当前页为第一页,则不显示“上一页”字符串 if (pageNo == pageCnt) { nextPage = string.Empty; }//如果当前页为最后一页,则不显示“下一页”字符串 pageInfo = new string[14]; pageInfo[0] = totalCnt.ToString(); //显示记录集总数 pageInfo[1] = pageCnt.ToString(); //显示总页数 pageInfo[2] = abovePage; //显示上一页 pageInfo[3] = nextPage; //显示下一页 int startIndex; int endIndex; startIndex = (pageNo / 10) * 10 + 1; //起始页 if (pageNo % 10 == 0) { startIndex = startIndex - 10; } endIndex = startIndex + 9; //结束页 if (endIndex > pageCnt) { endIndex = pageCnt; }//如果结束页大于总页数,则结束页为最后一页值 int pageIndex = 4; for (int i = startIndex; i <= endIndex; i++) { string pageValue = pageNumLink + i.ToString() + "\">" + i.ToString() + "</a>"; if (i == pageNo) { pageValue = i.ToString(); } pageInfo[pageIndex] = pageValue; pageIndex++; } return dt; }