asp.net 结合mysql存储过程进行分页代码

不过在网上找了一些，发现都有一个特点――就是不能传出总记录数，干脆自己研究吧。终于，算是搞出来了，效率可能不是很好，但是我也觉得不错了。贴代码吧直接：也算是对自己学习mysql的一个记录。

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

asp.net

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; 
}