/*分页存储过程
Descript:分页存储过程
Author:Blue.Dream
Date:2004-8-18 21:01
*/
Create  PROCEDURE ListPage(
@tblName 	nvarchar(200),		         ----要显示的表或多个表的连接
@fldName 	nvarchar(200) = '*',	         ----要显示的字段列表
@pageSize	int = 10,		                  ----每页显示的记录个数
@page		int = 1,		         ----要显示那一页的记录
@pageCount	int = 1 output,	         ----查询结果分页后的总页数
@Counts	int = 1 output,		         ----查询到的记录数
@fldSort	nvarchar(100) = null,	         ----排序字段列表或条件
@Sort		bit = 0,		         ----排序方法，0为升序，1为降序
@strCondition	nvarchar(200) = null,	----查询条件,不需where
@ID		nvarchar(50)		----主表的主键
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar(1000)		----存放动态生成的SQL语句
Declare @strTmp nvarchar(1000)		----存放取得查询结果总数的查询语句
Declare @strID	 nvarchar(1000)		----存放取得查询开头或结尾ID的查询语句
Declare @sqlSort nvarchar(200)		----存放临时生成的排序条件
Declare @intCounts int			----要移动的记录数
Declare @BeginID int			----开始的ID
Declare @EndID   int			----结束的ID



--------首先生成排序方法---------
if @Sort=0		--升序
begin
	  if not(@fldSort is null)
		set @sqlSort = ' Order by ' + @fldSort	
	  else
		set @sqlSort = ' Order by ' + @ID  
end
else			--降序
begin
	if not(@fldSort is null)
		set @sqlSort = ' Order by ' + @fldSort + ' DESC'		
	else
		set @sqlSort = ' Order by ' + @ID + ' DESC '
end


--------生成查询语句--------
--此处@strTmp为取得查询结果数量的语句
if @strCondition is null	--没有设置显示条件
	begin
	set @sqlTmp =  @fldName + ' From ' + @tblName
	set @strTmp = 'select @Counts=Count(' + @ID + ') FROM '+@tblName
	set @strID = ' From ' + @tblName
	end
else
	begin
	set @sqlTmp = + @fldName + 'From ' + @tblName + ' where ' + @strCondition
	set @strTmp = 'select @Counts=Count(' + @ID + ') FROM '+@tblName + ' where ' + @strCondition
	set @strID = ' From ' + @tblName + ' where ' + @strCondition
	end
	


----取得查询结果总数量-----
exec sp_executesql @strTmp,N'@Counts int out ',@Counts out

--取得分页总数
if @Counts <= @pageSize
	set @pageCount = 1
else
	set @pageCount = (@Counts / @pageSize) + 1


--计算要移动的记录数
if @page = 1 
	set @intCounts = @pageSize
else
begin
	set @intCounts = (@page-1) * @pageSize + 1
end

-----取得分页后此页的第一条记录的ID
set @strID = 'select @BeginID=' + @ID + ' ' + @strID



set @intCounts = @intCounts - @pageSize + 1
set rowcount  @intCounts
exec sp_executesql @strID,N'@BeginID int out ',@BeginID out

-----取得分页后此页的最后一条记录的ID
set @intCounts = @intCounts + @pageSize - 1
print @intCounts
set rowcount  @intCounts
exec sp_executesql @strID,N'@BeginID int out ',@EndID out


------恢复系统设置-----
set rowcount  0
SET NOCOUNT OFF

------返回查询结果-----
if @strCondition is null
	set @strTmp = 'select ' + @sqlTmp + ' where ' + @ID + ' between ' + str(@BeginID) + ' and ' + str(@EndID)
else
	set @strTmp = 'select ' + @sqlTmp + ' where ' + @ID +' (between ' + str(@BeginID) + ' and ' + str(@EndID) + ')  and ' + @strCondition

if not(@sqlSort is null)
set @strTmp = @strTmp + @sqlSort
exec sp_executesql @strTmp

GO