mysql通用分页存储过程遇到的问题

DELIMITER $$

USE `tsb_asksys`$$

DROP PROCEDURE IF EXISTS `P_viewPage`$$

CREATE DEFINER=`root`@`localhost` PROCEDURE `P_viewPage`(
$TableName VARCHAR(200),/*表名*/
$FieldList VARCHAR(2000),  /*显示列名*/
$PrimaryKey VARCHAR(100),  /*单一主键或唯一值键*/
$WhereStr VARCHAR(1000),  /*查询条件 不含'where'字符*/
$OrderStr VARCHAR(1000),  /*排序 不含'order by'字符，如id asc,userid desc，当@SortType=3时生效*/
$SortType INT,  /*排序规则 1:正序asc 2:倒序desc 3:多列排序*/
$RecorderCount INT,  /*记录总数 0:会返回总记录*/
$PageSize INT,  /*每页输出的记录数*/
$PageIndex INT,  /*当前页数*/
OUT    $TotalCount INTEGER,  /*返回记录总数*/
OUT    $TotalPageCount INTEGER  /*返回总页数*/
)
BEGIN
IF !(($TableName IS NULL OR $TableName='') OR ($FieldList IS NULL OR $FieldList='') OR ($PrimaryKey IS NULL OR $PrimaryKey='') OR $SortType < 1 OR $SortType >3 OR $RecorderCount < 0 OR $PageSize < 0 OR $PageIndex < 0) THEN
IF ($WhereStr IS NULL OR $WhereStr='') THEN
SET @new_where1 = ' ' ;
SET @new_where2 = ' WHERE ' ;
ELSE
SET @new_where1 =CONCAT(' WHERE ',$WhereStr);
SET @new_where2 =CONCAT(' WHERE ',$WhereStr,' AND ');
END IF;
IF $OrderStr='' OR $SortType = 1 OR $SortType = 2 THEN
IF $SortType = 1 THEN
SET @new_order =CONCAT(' ORDER BY ',$PrimaryKey,' ASC' );
END IF;
IF $SortType = 2 THEN
SET @new_order =CONCAT(' ORDER BY ',$PrimaryKey,' DESC');
END IF;
ELSE
SET @new_order =CONCAT(' ORDER BY ',$OrderStr);
END IF;
SET @SqlCount = CONCAT('SELECT COUNT(*) into @TotalCount FROM ',$TableName,@new_where1);
SET @SqlCount1 = CONCAT('SELECT CEILING((COUNT(*)+0.0)/',$PageSize,') into @TotalPageCount FROM ',$TableName,@new_where1);
IF $RecorderCount = 0 THEN
PREPARE stmt1 FROM @SqlCount;
EXECUTE stmt1;
SET $TotalCount=@TotalCount;
PREPARE stmt1 FROM @SqlCount1;
EXECUTE stmt1;
SET $TotalPageCount=@TotalPageCount;
ELSE
SET $TotalCount = $RecorderCount;
END IF;
IF $PageIndex > CEILING(($TotalCount+0.0)/$PageSize) THEN
SET $PageIndex = CEILING(($TotalCount+0.0)/$PageSize);
END IF;
IF $PageIndex = 0 OR $PageIndex = 1 THEN
SET @Sql=CONCAT('SELECT ',$FieldList,' FROM ',$TableName,@new_where1,@new_order,' limit ',$PageSize);
ELSE
IF $SortType = 1 THEN
SET @Sql=CONCAT('SELECT ',$FieldList,' FROM ',$TableName,@new_where2,$PrimaryKey,' > (SELECT max(',$PrimaryKey,') FROM (SELECT ',$PrimaryKey,' FROM ',$TableName,@new_where1,@new_order,' limit ',$PageSize*($PageIndex-1),' ) AS TMP) ',@new_order,' limit ',$PageSize);
END IF;
IF $SortType = 2 THEN
SET @Sql=CONCAT('SELECT ',$FieldList,' FROM ',$TableName,@new_where2,$PrimaryKey,' < (SELECT MIN(',$PrimaryKey,') FROM (SELECT ',$PrimaryKey,' FROM ',$TableName,@new_where1,@new_order,' limit ',$PageSize*($PageIndex-1),' ) AS TMP) ',@new_order,' limit ',$PageSize);
END IF;
IF $SortType = 3 THEN
/*IF INSTR($OrderStr,',') > 0 THEN
SET @Sql=CONCAT('SELECT ',$FieldList,' FROM ',$TableName,@new_where2,$PrimaryKey,' NOT IN (SELECT ',$PrimaryKey,' FROM (SELECT ',$PrimaryKey,' FROM ',$TableName,@new_where1,@new_order,' limit ',$PageSize*($PageIndex-1),' ) a)',@new_order,' limit ',$PageSize);
ELSE
SET @new_order =CONCAT(' ORDER BY ',$PrimaryKey,' ASC' );
SET @Sql=CONCAT('SELECT ',$FieldList,' FROM ',$TableName,@new_where2,$PrimaryKey,' > (SELECT max(',$PrimaryKey,') FROM (SELECT ',$PrimaryKey,' FROM ',$TableName,@new_where1,@new_order,' limit ',$PageSize*($PageIndex-1),' ) AS TMP) ',@new_order,' limit ',$PageSize);
END IF;*/
SET @Sql=CONCAT('SELECT ',$FieldList,' FROM ',$TableName,@new_where2,$PrimaryKey,' NOT IN (SELECT ',$PrimaryKey,' FROM (SELECT ',$PrimaryKey,' FROM ',$TableName,@new_where1,@new_order,' limit ',$PageSize*($PageIndex-1),' ) a)',@new_order,' limit ',$PageSize);
END IF;
END IF;
PREPARE stmt2 FROM @Sql;
EXECUTE stmt2;
END IF;
END$$

DELIMITER ;

static public DataTable getAllUser(int PageSize, int CurrPageIndex, out int AllRecordCount, String _SearchWhere)
{
using (MySqlCommand cmd = new MySqlCommand("P_viewPage"))
{
cmd.CommandType = CommandType.StoredProcedure;

//设置表名称：
System.Text.StringBuilder TableName = new System.Text.StringBuilder();
TableName.Append(" GQShowV_UserInfoForAdmin t1 ");
cmd.Parameters.AddWithValue("@$TableName", TableName.ToString());//对表名参数赋值

//设置字段名称：
System.Text.StringBuilder myfld_str = new System.Text.StringBuilder();
myfld_str.Append("  t1.RecordID, t1.UserID, t1.LoginID, t1.Nickname,t1.SexID_Exp,t1.UserEmail_Exp,t1.CreateDate,t1.UserName,t1.Phone, t1.Tel,t1.IsAdmin_Exp ");
cmd.Parameters.AddWithValue("@$FieldList", myfld_str.ToString());//对字段参数赋值

//设置按哪个字段进行排序
cmd.Parameters.AddWithValue("@$OrderStr", "t1.createDate DESC");// --排序 不含'order by'字符，如id asc,userid desc，当@SortType=3时生效

/*设置排序方式，规则说明：1是按照PrimaryKey正序asc；2按照PrimaryKey倒序desc；
3按照非关键字或多关键字排序，比如日期，排序字段后可跟asc或desc，如t1.createDate DESC或t1.createDate DESC,t1.other asc
另外请注意：排序方式只有1,2,3，其他数字不会从数据库中读出数据*/
cmd.Parameters.AddWithValue("@$SortType", 3);//--排序规则 1:正序asc 2:倒序desc 3:多列排序

//设置主表的关键字，切记：主键前不要加前缀，否则第二页及以后页内容无法读出
cmd.Parameters.AddWithValue("@$PrimaryKey", "UserID");//t1.UserID 第二页不会显示出来，因为有前缀
//设置总查询记录数：为0时，查询实际记录，主要解决表记录非常大，那么可以限制只查询10万条记录这样的问题
cmd.Parameters.AddWithValue("@$RecorderCount", 0);
//设置查询条件
System.Text.StringBuilder query_where = new StringBuilder();//保存查询条件
query_where.Append(" (1 = 1) ");

if (!String.IsNullOrEmpty(_SearchWhere))
{
query_where.AppendFormat("and (t1.UserName LIKE N'%{0}%')", _SearchWhere);
}

cmd.Parameters.AddWithValue("@$WhereStr", query_where.ToString());//设置查询条件

//设置每页要显示的记录数
cmd.Parameters.AddWithValue("@$PageSize", PageSize);
//设置要显示的页码：
cmd.Parameters.AddWithValue("@$PageIndex", CurrPageIndex);
//保存查询到的总记录数

MySqlParameter record_num = new MySqlParameter();
record_num = cmd.Parameters.Add(new MySqlParameter("@$TotalCount", SqlDbType.Int));
record_num.Direction = ParameterDirection.Output;
//
int _TotalPageCount = 0;
MySqlParameter TotalPageCount = new MySqlParameter();
TotalPageCount = cmd.Parameters.Add(new MySqlParameter("@$TotalPageCount", SqlDbType.Int));
TotalPageCount.Direction = ParameterDirection.Output;

using (DataTable dt = ObjectMindDBForMysql.MySqlHelper.GetData(cmd))
{
AllRecordCount = int.Parse(cmd.Parameters["@$TotalCount"].Value.ToString());
_TotalPageCount = int.Parse(cmd.Parameters["@$TotalPageCount"].Value.ToString());
return dt;
}
}
}