2分法分页存储过程脚本实例
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2023-11-04 22:14:22
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复制代码...
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
复制代码 代码如下:
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。
复制代码 代码如下:
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