时间:2021-07-01 10:21:17 帮助过:44人阅读
Declare @strSortType nvarchar(10) ----数据排序规则A
Declare @strFSortType nvarchar(10) ----数据排序规则B
Declare @SqlSelect nvarchar(50) ----对含有DISTINCT的查询进行SQL构造
Declare @SqlCounts nvarchar(50) ----对含有DISTINCT的总数查询进行SQL构造
if @Dist = 0
begin
set @SqlSelect = 'select '
set @SqlCounts = 'Count(*)'
end
else
begin
set @SqlSelect = 'select distinct '
set @SqlCounts = 'Count(DISTINCT ' @ID ')'
end
if @Sort=0
begin
set @strFSortType=' ASC '
set @strSortType=' DESC '
end
else
begin
set @strFSortType=' DESC '
set @strSortType=' ASC '
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 or @strCondition='' --没有设置显示条件
begin
set @sqlTmp = @fldName ' From ' @tblName
set @strTmp = @SqlSelect ' @Counts=' @SqlCounts ' FROM ' @tblName
set @strID = ' From ' @tblName
end
else
begin
set @sqlTmp = @fldName 'From ' @tblName ' where (1>0) ' @strCondition
set @strTmp = @SqlSelect ' @Counts=' @SqlCounts ' FROM ' @tblName ' where (1>0) ' @strCondition
set @strID = ' From ' @tblName ' where (1>0) ' @strCondition
end
----取得查询结果总数量-----
exec sp_executesql @strTmp,N'@Counts int out ',@Counts out
declare @tmpCounts int
if @Counts = 0
set @tmpCounts = 1
else
set @tmpCounts = @Counts
--取得分页总数
set @pageCount=(@tmpCounts @pageSize-1)/@pageSize
/**//**当前页大于总页数 取最后一页**/
if @page>@pageCount
set @page=@pageCount
--/*-----数据分页2分处理-------*/
declare @pageIndex int --总数/页大小
declare @lastcount int --总数%页大小
set @pageIndex = @tmpCounts/@pageSize
set @lastcount = @tmpCounts%@pageSize
if @lastcount > 0
set @pageIndex = @pageIndex 1
else
set @lastcount = @pagesize
--//***显示分页
if @strCondition is null or @strCondition='' --没有设置显示条件
begin
if @pageIndex<2 or @page<=@pageIndex / 2 @pageIndex % 2 --前半部分数据处理
begin
if @page=1
set @strTmp=@SqlSelect ' top ' CAST(@pageSize as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' order by ' @fldSort ' ' @strFSortType
else
begin
set @strTmp=@SqlSelect ' top ' CAST(@pageSize as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' where ' @ID ' <(select min(' @ID ') from (' @SqlSelect ' top ' CAST(@pageSize*(@page-1) as Varchar(20)) ' ' @ID ' from ' @tblName
' order by ' @fldSort ' ' @strFSortType ') AS TBMinID)'
' order by ' @fldSort ' ' @strFSortType
end
end
else
begin
set @page = @pageIndex-@page 1 --后半部分数据处理
if @page <= 1 --最后一页数据显示
set @strTmp=@SqlSelect ' * from (' @SqlSelect ' top ' CAST(@lastcount as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' order by ' @fldSort ' ' @strSortType ') AS TempTB' ' order by ' @fldSort ' ' @strFSortType
else
set @strTmp=@SqlSelect ' * from (' @SqlSelect ' top ' CAST(@pageSize as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' where ' @ID ' >(select max(' @ID ') from(' @SqlSelect ' top ' CAST(@pageSize*(@page-2) @lastcount as Varchar(20)) ' ' @ID ' from ' @tblName
' order by ' @fldSort ' ' @strSortType ') AS TBMaxID)'
' order by ' @fldSort ' ' @strSortType ') AS TempTB' ' order by ' @fldSort ' ' @strFSortType
end
end
else --有查询条件
begin
if @pageIndex<2 or @page<=@pageIndex / 2 @pageIndex % 2 --前半部分数据处理
begin
if @page=1
set @strTmp=@SqlSelect ' top ' CAST(@pageSize as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' where 1=1 ' @strCondition ' order by ' @fldSort ' ' @strFSortType
else
begin
set @strTmp=@SqlSelect ' top ' CAST(@pageSize as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' where ' @ID ' <(select min(' @ID ') from (' @SqlSelect ' top ' CAST(@pageSize*(@page-1) as Varchar(20)) ' ' @ID ' from ' @tblName
' where (1=1) ' @strCondition ' order by ' @fldSort ' ' @strFSortType ') AS TBMinID)'
' ' @strCondition ' order by ' @fldSort ' ' @strFSortType
end
end
else
begin
set @page = @pageIndex-@page 1 --后半部分数据处理
if @page <= 1 --最后一页数据显示
set @strTmp=@SqlSelect ' * from (' @SqlSelect ' top ' CAST(@lastcount as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' where (1=1) ' @strCondition ' order by ' @fldSort ' ' @strSortType ') AS TempTB' ' order by ' @fldSort ' ' @strFSortType
else
set @strTmp=@SqlSelect ' * from (' @SqlSelect ' top ' CAST(@pageSize as VARCHAR(4)) ' ' @fldName ' from ' @tblName
' where ' @ID ' >(select max(' @ID ') from(' @SqlSelect ' top ' CAST(@pageSize*(@page-2) @lastcount as Varchar(20)) ' ' @ID ' from ' @tblName
' where (1=1) ' @strCondition ' order by ' @fldSort ' ' @strSortType ') AS TBMaxID)'
' ' @strCondition ' order by ' @fldSort ' ' @strSortType ') AS TempTB' ' order by ' @fldSort ' ' @strFSortType
end
end
------返回查询结果-----
exec sp_executesql @strTmp
--print @strTmp
SET NOCOUNT OFF
GO
调用方法列子:
/**////
/// 通用分页数据读取函数
/// 注意:在函数调用外部打开和关闭连接,以及关闭数据读取器
///
/// SqlCommand对象
/// 查询的表/表联合
/// 要查询的字段名
/// 每页数据大小
/// 当前第几页
/// 排序字段
/// 排序顺序0降序1升序
/// 过滤条件
/// 主表主键
/// 返回的SqlDataReader ref
public static void CutPageData(SqlConnection conn, ref SqlCommand comm, string _tblName, string _fldName, int _pageSize, int _page, string _fldSort, int _Sort, string _strCondition, string _ID, ref SqlDataReader _dr)
{
//注意:在函数调用外部打开和关闭连接,以及关闭数据读取器
//comm = new SqlCommand("proc_ListPage",conn);
//comm.CommandType = CommandType.StoredProcedure;
comm.Parameters.Add("@tblName", SqlDbType.NVarChar, 200);
comm.Parameters["@tblName"].Value = _tblName;
comm.Parameters.Add("@fldName", SqlDbType.NVarChar, 500);
comm.Parameters["@fldName"].Value = _fldName;
comm.Parameters.Add("@pageSize", SqlDbType.Int);
comm.Parameters["@pageSize"].Value = _pageSize;
comm.Parameters.Add("@page", SqlDbType.Int);
comm.Parameters["@page"].Value = _page;
comm.Parameters.Add("@fldSort", SqlDbType.NVarChar, 200);
comm.Parameters["@fldSort"].Value = _fldSort;
comm.Parameters.Add("@Sort", SqlDbType.Bit);
comm.Parameters["@Sort"].Value = _Sort;
comm.Parameters.Add("@strCondition", SqlDbType.NVarChar, 1000);
comm.Parameters["@strCondition"].Value = _strCondition;
comm.Parameters.Add("@ID", SqlDbType.NVarChar, 150);
comm.Parameters["@ID"].Value = _ID;
comm.Parameters.Add("@Counts", SqlDbType.Int, 0);
comm.Parameters["@Counts"].Direction = ParameterDirection.Output;
comm.Parameters.Add("@pageCount", SqlDbType.Int, 0);
comm.Parameters["@pageCount"].Direction = ParameterDirection.Output;
_dr = comm.ExecuteReader();
}
调用例如:
CutPageData(conn, ref comm, "VOX_CDSinger", "id, cdsinger, cdsingertype, area, cdsingerreadme", 15, page, "id", 1, strFilter, "id", ref dr);
对应说明:
CutPageData(数据连接对象, ref Sqlcommand对象, "需要表或视图名称", "要查询的字段", 每页读取数据条数, 当前页, "排序字段可多字段如(addtime desc, visitcounts注意这里最后一个字段不加desc或asc 最后一个字段对应于后面的排序规则)", 排序方式(1 desc 0 asc), where条件(这里不再添加where条件添加如:' and visitcounts>100'), 表主键, ref 返回的SqlDataReader对象);
这里的调用同样适用于之前的not in版本.
呵呵 这里献给大家 圣诞快乐 !