2分法分页存储过程脚本实例

需要说明的是：这个存储过程参数比较多，我再实际使用中又在外面单独写了一个类，页面调用直接调用封装的类，方法有很多，主要是思路，大家可以参考下。

代码修改集中在类似

if @sort=0
set @strtmp = @strtmp + '<(select min('
 else
set @strtmp = @strtmp + '>(select max('

另外94行主要是配合我自己写的类，显示记录条数分页数等信息，如果不需要就去掉。

  1alter procedure [dbo].[proc_listpage]
  2(
  3 @tblname     nvarchar(200),        ----要显示的表或多个表的连接
  4 @fldname     nvarchar(500) = '*',    ----要显示的字段列表
  5 @pagesize    int = 10,        ----每页显示的记录个数
  6 @page        int = 1,        ----要显示那一页的记录
  7 @fldsort    nvarchar(200) = null,    ----排序字段列表或条件
  8 @sort        bit = 0,        ----排序方法，0为升序，1为降序(如果是多字段排列sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' sorta asc,sortb desc,sortc ')
  9 @strcondition    nvarchar(1000) = null,    ----查询条件,不需where
 10 @id        nvarchar(150),        ----主表的主键
 11 @dist      bit = 0,           ----是否添加查询字段的 distinct 默认0不添加/1添加
 12 @pagecount    int = 1 output,            ----查询结果分页后的总页数
 13 @counts    int = 1 output                ----查询到的记录数
 14 )
 15 as
 16 set nocount on
 17 declare @sqltmp nvarchar(1000)        ----存放动态生成的sql语句
 18 declare @strtmp nvarchar(1000)        ----存放取得查询结果总数的查询语句
 19 declare @strid     nvarchar(1000)        ----存放取得查询开头或结尾id的查询语句
 20
 21 declare @strsorttype nvarchar(10)    ----数据排序规则a
 22 declare @strfsorttype nvarchar(10)    ----数据排序规则b
 23
 24 declare @sqlselect nvarchar(50)         ----对含有distinct的查询进行sql构造
 25 declare @sqlcounts nvarchar(50)          ----对含有distinct的总数查询进行sql构造
 26
 27
 28 if @dist  = 0
 29 begin
 30     set @sqlselect = 'select '
 31     set @sqlcounts = 'count(0)'
 32 end
 33 else
 34 begin
 35     set @sqlselect = 'select distinct '
 36     set @sqlcounts = 'count(distinct '+@id+')'
 37 end
 38
 39
 40 if @sort=0
 41 begin
 42     set @strfsorttype=' asc '
 43     set @strsorttype=' desc '
 44 end
 45 else
 46 begin
 47     set @strfsorttype=' desc '
 48     set @strsorttype=' asc '
 49 end
 50
 51
 52
 53 --------生成查询语句--------
 54 --此处@strtmp为取得查询结果数量的语句
 55 if @strcondition is null or @strcondition=''     --没有设置显示条件
 56 begin
 57     set @sqltmp =  @fldname + ' from ' + @tblname
 58     set @strtmp = @sqlselect+' @counts='+@sqlcounts+' from '+@tblname
 59     set @strid = ' from ' + @tblname
 60 end
 61 else
 62 begin
 63     set @sqltmp = + @fldname + 'from ' + @tblname + ' where (1>0) ' + @strcondition
 64     set @strtmp = @sqlselect+' @counts='+@sqlcounts+' from '+@tblname + ' where (1>0) ' + @strcondition
 65     set @strid = ' from ' + @tblname + ' where (1>0) ' + @strcondition
 66 end
 67
 68 ----取得查询结果总数量-----
 69 exec sp_executesql @strtmp,n'@counts int out ',@counts out
 70 declare @tmpcounts int
 71 if @counts = 0
 72     set @tmpcounts = 1
 73 else
 74     set @tmpcounts = @counts
 75
 76     --取得分页总数
 77     set @pagecount=(@tmpcounts+@pagesize-1)/@pagesize
 78
 79     /**//**当前页大于总页数 取最后一页**/
 80     if @page>@pagecount
 81         set @page=@pagecount
 82
 83     --/*-----数据分页2分处理-------*/
 84     declare @pageindex int --总数/页大小
 85     declare @lastcount int --总数%页大小
 86
 87     set @pageindex = @tmpcounts/@pagesize
 88     set @lastcount = @tmpcounts%@pagesize
 89     if @lastcount > 0
 90         set @pageindex = @pageindex + 1
 91     else
 92         set @lastcount = @pagesize
 93
 94 --为配合显示
 95 set nocount off
 96 select @page curpage,@pagesize pagesize,@pagecount countpage,@tmpcounts [rowcount]
 97 set nocount on
 98
 99  --//***显示分页
100     if @strcondition is null or @strcondition=''     --没有设置显示条件
101     begin
102         if @pageindex<2 or @page<=@pageindex / 2 + @pageindex % 2   --前半部分数据处理
103             begin
104                 if @page=1
105                     set @strtmp=@sqlselect+' top '+ cast(@pagesize as varchar(40))+' '+ @fldname+' from '+@tblname                       
106                         +' order by '+ @fldsort +' '+ @strfsorttype
107                 else
108                 begin                   
109                     set @strtmp=@sqlselect+' top '+ cast(@pagesize as varchar(40))+' '+ @fldname+' from '+@tblname
110                         +' where '+@id
111                     if @sort=0
112                        set @strtmp = @strtmp + '>(select max('
113                     else
114                        set @strtmp = @strtmp + '<(select min('
115                     set @strtmp = @strtmp + @id +') from ('+ @sqlselect+' top '+ cast(@pagesize*(@page-1) as varchar(20)) +' '+ @id +' from '+@tblname
116                         +' order by '+ @fldsort +' '+ @strfsorttype+') as tbminid)'
117                         +' order by '+ @fldsort +' '+ @strfsorttype
118                 end   
119             end
120         else
121            
122             begin
123             set @page = @pageindex-@page+1 --后半部分数据处理
124                 if @page <= 1 --最后一页数据显示           
125                     set @strtmp=@sqlselect+' * from ('+@sqlselect+' top '+ cast(@lastcount as varchar(40))+' '+ @fldname+' from '+@tblname
126                         +' order by '+ @fldsort +' '+ @strsorttype+') as temptb'+' order by '+ @fldsort +' '+ @strfsorttype
127                 else
128                     begin
129                     set @strtmp=@sqlselect+' * from ('+@sqlselect+' top '+ cast(@pagesize as varchar(40))+' '+ @fldname+' from '+@tblname
130                         +' where '+@id
131                         if @sort=0
132                            set @strtmp=@strtmp+' <(select min('
133                         else
134                            set @strtmp=@strtmp+' >(select max('
135  set @strtmp=@strtmp+ @id +') from('+ @sqlselect+' top '+ cast(@pagesize*(@page-2)+@lastcount as varchar(20)) +' '+ @id +' from '+@tblname
136                         +' order by '+ @fldsort +' '+ @strsorttype+') as tbmaxid)'
137                         +' order by '+ @fldsort +' '+ @strsorttype+') as temptb'+' order by '+ @fldsort +' '+ @strfsorttype
138                    end
139             end
140
141     end
142
143     else --有查询条件
144     begin
145         if @pageindex<2 or @page<=@pageindex / 2 + @pageindex % 2   --前半部分数据处理
146         begin
147                 if @page=1
148                     set @strtmp=@sqlselect+' top '+ cast(@pagesize as varchar(40))+' '+ @fldname+' from '+@tblname                       
149                         +' where 1=1 ' + @strcondition + ' order by '+ @fldsort +' '+ @strfsorttype
150                 else
151                 begin                   
152                     set @strtmp=@sqlselect+' top '+ cast(@pagesize as varchar(40))+' '+ @fldname+' from '+@tblname
153                         +' where '+@id
154                     if @sort=0
155                        set @strtmp = @strtmp + '>(select max('
156                     else
157                        set @strtmp = @strtmp + '<(select min('
158
159                  set @strtmp = @strtmp + @id +') from ('+ @sqlselect+' top '+ cast(@pagesize*(@page-1) as varchar(20)) +' '+ @id +' from '+@tblname
160                         +' where (1=1) ' + @strcondition +' order by '+ @fldsort +' '+ @strfsorttype+') as tbminid)'
161                         +' '+ @strcondition +' order by '+ @fldsort +' '+ @strfsorttype
162                 end           
163         end
164         else
165         begin
166             set @page = @pageindex-@page+1 --后半部分数据处理
167             if @page <= 1 --最后一页数据显示
168                     set @strtmp=@sqlselect+' * from ('+@sqlselect+' top '+ cast(@lastcount as varchar(40))+' '+ @fldname+' from '+@tblname
169                         +' where (1=1) '+ @strcondition +' order by '+ @fldsort +' '+ @strsorttype+') as temptb'+' order by '+ @fldsort +' '+ @strfsorttype                    
170             else
171                   begin
172                     set @strtmp=@sqlselect+' * from ('+@sqlselect+' top '+ cast(@pagesize as varchar(40))+' '+ @fldname+' from '+@tblname
173                         +' where '+@id
174                     if @sort=0
175                        set @strtmp = @strtmp + '<(select min('
176                     else
177                        set @strtmp = @strtmp + '>(select max('
178                set @strtmp = @strtmp + @id +') from('+ @sqlselect+' top '+ cast(@pagesize*(@page-2)+@lastcount as varchar(20)) +' '+ @id +' from '+@tblname
179                         +' where (1=1) '+ @strcondition +' order by '+ @fldsort +' '+ @strsorttype+') as tbmaxid)'
180                         +' '+ @strcondition+' order by '+ @fldsort +' '+ @strsorttype+') as temptb'+' order by '+ @fldsort +' '+ @strfsorttype 
181                  end             
182         end   
183  
184     end
185
186 ------返回查询结果-----
187 set nocount off
188 exec sp_executesql @strtmp
189 print @strtmp