C#中常用的分页存储过程小结
表中主键必须为标识列，[ID] int IDENTITY
(1,1)//每次自增一
1.分页方案一：(利用Not In和SELECT
TOP分页)
语句形式：
复制代码代码如下:
SELECT TOP 10 *
FROM
TestTable
WHERE (ID NOT IN
(SELECT TOP 20
id
FROM TestTable
ORDER BY id))
ORDER BY
ID
SELECT TOP 页大小 *
FROM
TestTable
WHERE (ID NOT IN
(SELECT TOP 页大小*页数
id
FROM 表
ORDER BY id))
ORDER BY ID
2.分页方案二：(利用ID大于多少和SELECT
TOP分页）
语句形式：
复制代码代码如下:
SELECT TOP 10 *
FROM
TestTable
WHERE (ID >
(SELECT MAX(id)
FROM
(SELECT TOP 20 id
FROM TestTable
ORDER BY id) AS
T))
ORDER BY ID
SELECT TOP 页大小 *
FROM
TestTable
WHERE (ID >
(SELECT MAX(id)
FROM
(SELECT TOP 页大小*页数 id
FROM 表
ORDER BY id) AS
T))
ORDER BY ID
3.分页方案三：(利用SQL的游标存储过程分页)
复制代码代码如下:
create procedure
SqlPager
@sqlstr nvarchar(4000), --查询字符串
@currentpage
int, --第N页
@pagesize int --每页行数
as
set nocount
on
declare @P1 int, --P1是游标的id
@rowcount
int
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,
@rowcount=@rowcount output
select
ceiling(1.0*@rowcount/@pagesize) as 总页数--,@rowcount as 总行数,@currentpage as
当前页
set @currentpage=(@currentpage-1)*@pagesize+1
exec
sp_cursorfetch @P1,16,@currentpage,@pagesize
exec sp_cursorclose
@P1
set nocount off
4.
复制代码代码如下:
CREATE Procedure
FramWorkPage
@TableName varchar(50), --表名
@Fields
varchar(5000) = ‘*‘, --字段名(全部字段为*)
@OrderField varchar(5000),
--排序字段(必须!支持多字段)
@sqlWhere varchar(5000) =
Null,--条件语句(不用加where)
@pageSize int,
--每页多少条记录
@pageIndex int = 1 , --指定当前为第几页
@TotalPage int
output, --返回条数
@OrderType bit -- 设置排序类型,1 升序 0
值则降序
as
begin
declare @strOrder varchar(400) --
排序类型
Begin Tran --开始事务
Declare @sql
nvarchar(4000);
Declare @totalRecord
int;
--计算总记录数
if (@SqlWhere =‘‘‘‘ or @SqlWhere=‘‘ or
@sqlWhere is NULL)
set @sql = ‘select @totalRecord = count(*)
from ‘ + @TableName
else
set @sql = ‘select @totalRecord
= count(*) from ‘ + @TableName + ‘ where ‘ + @sqlWhere
EXEC
sp_executesql @sql,N‘@totalRecord int OUTPUT‘,@totalRecord
OUTPUT--计算总记录数
--计算总页数
select @TotalPage=@totalRecord
--CEILING((@totalRecord+0.0)/@PageSize)
if @OrderType =
0
begin
set @strOrder = ‘ order by [‘ + @OrderField +‘]
desc‘
--如果@OrderType是0，就执行降序，这句很重要！
end
else
begin
set
@strOrder = ‘ order by [‘ + @OrderField +‘]
asc‘
end
if (@SqlWhere =‘‘‘‘ or @SqlWhere=‘‘ or
@sqlWhere is NULL)
set @sql = ‘Select * FROM (select ROW_NUMBER()
Over( ‘+@strOrder+‘ ) as rowId,‘ + @Fields + ‘ from ‘ +
@TableName
else
set @sql = ‘Select * FROM (select
ROW_NUMBER() Over( ‘+@strOrder+‘ ) as rowId,‘ + @Fields + ‘ from ‘ +
@TableName + ‘ where ‘ + @SqlWhere
--处理页数超出范围情况
if
@PageIndex<=0
Set @pageIndex = 1
if
@pageIndex>@TotalPage
Set @pageIndex =
@TotalPage
--处理开始点和结束点
Declare @StartRecord
int
Declare @EndRecord int
set @StartRecord =
(@pageIndex-1)*@PageSize + 1
set @EndRecord = @StartRecord +
@pageSize - 1
if @OrderType = 0
begin
set
@strOrder = ‘ order by rowid
desc‘
--如果@OrderType是0，就执行降序，这句很重要！
end
else
begin
set
@strOrder = ‘ order by rowid
asc‘
end
--继续合成sql语句
set @Sql = @Sql + ‘) as ‘
+ @TableName + ‘ where rowId between ‘ + Convert(varchar(50),@StartRecord)
+ ‘ and ‘ + Convert(varchar(50),@EndRecord) + ‘ ‘+@strOrder
--
print
@sql
Exec(@Sql)
---------------------------------------------------
If
@@Error <> 0
Begin
RollBack Tran
Return
-1
End
Else
Begin
Commit
Tran
Return @totalRecord
---返回记录总数
End
end
