学步园

 http://www.cnblogs.com/nzperfect/archive/2009/06/14/1503237.html

Create PROC P_viewPage         
    /**//*          
    nzperfect [no_mIss] 高效通用分页存储过程(双向检索) 2007.5.7  QQ:34813284          
    敬告：适用于单一主键或存在唯一值列的表或视图          
    ps:Sql语句为8000字节,调用时请注意传入参数及sql总长度不要超过指定范围          
    */          
    @TableName VARCHAR(200),     --表名          
    @FieldList VARCHAR(2000),    --显示列名，如果是全部字段则为*          
    @PrimaryKey VARCHAR(100),    --单一主键或唯一值键          
    @Where VARCHAR(2000),        --查询条件 不含'where'字符，如id>10 and len(userid)>9          
    @Order VARCHAR(1000),        --排序 不含'order by'字符，如id asc,userid desc，必须指定asc或desc          
    --注意当@SortType=3时生效，记住一定要在最后加上主键，否则会让你比较郁闷          
    @SortType INT,               --排序规则 1:正序asc 2:倒序desc 3:多列排序方法          
    @RecorderCount INT,          --记录总数 0:会返回总记录          
    @PageSize INT,               --每页输出的记录数          
    @PageIndex INT,              --当前页数          
    @TotalCount INT OUTPUT ,      --记返回总记录          
    @TotalPageCount INT OUTPUT   --返回总页数          
AS          
SET NOCOUNT ON          
    IF ISNULL(@TotalCount,'') = '' SET @TotalCount = 0          
    SET @Order = RTRIM(LTRIM(@Order))          
    SET @PrimaryKey = RTRIM(LTRIM(@PrimaryKey))          
    SET @FieldList = REPLACE(RTRIM(LTRIM(@FieldList)),' ','')          
    WHILE CHARINDEX(', ',@Order) > 0 or CHARINDEX(' ,',@Order) > 0          
        BEGIN          
            SET @Order = REPLACE(@Order,', ',',')          
            SET @Order = REPLACE(@Order,' ,',',')          
        END          
    IF ISNULL(@TableName,'') = '' or ISNULL(@FieldList,'') = ''          
            or ISNULL(@PrimaryKey,'') = ''          
            or @SortType < 1 or @SortType >3          
            or @RecorderCount  < 0 or @PageSize < 0 or @PageIndex < 0          
        BEGIN          
            PRINT('ERR_00')          
            RETURN          
        END          
    IF @SortType = 3          
        BEGIN          
            IF (UPPER(RIGHT(@Order,4))!=' ASC' AND UPPER(RIGHT(@Order,5))!=' DESC')          
                BEGIN PRINT('ERR_02') RETURN END          
        END          
    DECLARE @new_where1 VARCHAR(1000)          
    DECLARE @new_where2 VARCHAR(1000)          
    DECLARE @new_order1 VARCHAR(1000)          
    DECLARE @new_order2 VARCHAR(1000)          
    DECLARE @new_order3 VARCHAR(1000)          
    DECLARE @Sql VARCHAR(8000)          
    DECLARE @SqlCount NVARCHAR(4000)          
    IF ISNULL(@where,'') = ''          
        BEGIN          
            SET @new_where1 = ' '          
            SET @new_where2 = ' Where  '          
        END          
    ELSE          
        BEGIN          
            SET @new_where1 = ' Where ' + @where          
            SET @new_where2 = ' Where ' + @where + ' AND '          
        END          
    IF ISNULL(@order,'') = '' or @SortType = 1  or @SortType = 2          
        BEGIN          
            IF @SortType = 1          
                BEGIN          
                    SET @new_order1 = ' orDER BY ' + @PrimaryKey + ' ASC'          
                    SET @new_order2 = ' orDER BY ' + @PrimaryKey + ' DESC'          
                END          
            IF @SortType = 2          
                BEGIN          
                    SET @new_order1 = ' orDER BY ' + @PrimaryKey + ' DESC'          
                    SET @new_order2 = ' orDER BY ' + @PrimaryKey + ' ASC'          
                END          
        END          
    ELSE          
        BEGIN          
            SET @new_order1 = ' orDER BY ' + @Order          
        END          
    
    IF @SortType = 3 AND  CHARINDEX(','+@PrimaryKey+' ',','+@Order)>0          
    BEGIN          
        SET @new_order1 = ' orDER BY ' + @Order          
        SET @new_order2 = @Order + ','          
        SET @new_order2 = REPLACE(REPLACE(@new_order2,'ASC,','{ASC},'),'DESC,','{DESC},')          
        SET @new_order2 = REPLACE(REPLACE(@new_order2,'{ASC},','DESC,'),'{DESC},','ASC,')          
        SET @new_order2 = ' orDER BY ' + SUBSTRING(@new_order2,1,LEN(@new_order2)-1)          
        IF @FieldList <> '*'          
            BEGIN          
                SET @new_order3 = REPLACE(REPLACE(@Order + ',','ASC,',','),'DESC,',',')          
                SET @FieldList = ',' + @FieldList          
                WHILE CHARINDEX(',',@new_order3)>0          
                    BEGIN          
                        IF CHARINDEX(SUBSTRING(','+@new_order3,1,CHARINDEX(',',@new_order3)),','+@FieldList+',')>0          
                            BEGIN          
                                SET @FieldList =          
                                @FieldList + ',' + SUBSTRING(@new_order3,1,CHARINDEX(',',@new_order3))          
                            END          
                        SET @new_order3 =          
                        SUBSTRING(@new_order3,CHARINDEX(',',@new_order3)+1,LEN(@new_order3))          
                    END          
                SET @FieldList = SUBSTRING(@FieldList,2,LEN(@FieldList))          
            END          
        END     
         
    SET @SqlCount = 'Select @TotalCount=COUNT(*),@TotalPageCount=CEILING((COUNT(*)+0.0)/'          
    + CAST(@PageSize AS VARCHAR)+') FROM (Select * FROM ' + @TableName + @new_where1+') AS T'          
    IF @RecorderCount  = 0          
        BEGIN          
            EXEC SP_EXECUTESQL @SqlCount,N'@TotalCount INT OUTPUT,@TotalPageCount INT OUTPUT',          
            @TotalCount OUTPUT,@TotalPageCount OUTPUT          
        END          
    ELSE          
        BEGIN          
            Select @TotalCount = @RecorderCount        
        END          
    IF @PageIndex > CEILING((@TotalCount+0.0)/@PageSize)          
        BEGIN          
            SET @PageIndex =  CEILING((@TotalCount+0.0)/@PageSize)          
        END          
    IF @PageIndex = 1 or @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize)          
        BEGIN          
            IF @PageIndex = 1 --返回第一页数据          
                BEGIN          
                    SET @Sql = 'Select * FROM (Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '          
                    + @TableName + @new_where1 + @new_order1 +') AS TMP ' + @new_order1    
                END          
            IF @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize)  --返回最后一页数据          
                BEGIN          
                    SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('          
                    + 'Select TOP ' + STR(ABS(@PageSize*@PageIndex-@TotalCount-@PageSize))          
                    + ' ' + @FieldList + ' FROM '          
                    + @TableName + @new_where1 + @new_order2 + ' ) AS TMP '          
                    + @new_order1          
                END          
        END          
    ELSE      
            
        BEGIN          
        IF @SortType = 1  --仅主键正序排序          
            BEGIN          
                IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2  --正向检索          
                    BEGIN          
                        SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '          
                        + @TableName + @new_where2 + @PrimaryKey + ' > '          
                        + '(Select MAX(' + @PrimaryKey + ') FROM (Select TOP '          
                        + STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey          
                        + ' FROM ' + @TableName          
                        + @new_where1 + @new_order1 +' ) AS TMP) '+ @new_order1          
                    END          
                ELSE  --反向检索          
                    BEGIN          
                        SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('          
                        + 'Select TOP ' + STR(@PageSize) + ' '          
                        + @FieldList + ' FROM '          
                        + @TableName + @new_where2 + @PrimaryKey + ' < '          
                        + '(Select MIN(' + @PrimaryKey + ') FROM (Select TOP '         
                        + STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey          
                        + ' FROM ' + @TableName          
                        + @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2          
                        + ' ) AS TMP ' + @new_order1          
                    END          
            END          
        IF @SortType = 2  --仅主键反序排序          
            BEGIN          
                IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2  --正向检索          
                    BEGIN          
                        SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '          
                        + @TableName + @new_where2 + @PrimaryKey + ' < '          
                        + '(Select MIN(' + @PrimaryKey + ') FROM (Select TOP '          
                        + STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey          
                        +' FROM '+ @TableName          
                        + @new_where1 + @new_order1 + ') AS TMP) '+ @new_order1          
                    END          
                ELSE  --反向检索          
                    BEGIN          
                        SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('          
                        + 'Select TOP ' + STR(@PageSize) + ' '          
                        + @FieldList + ' FROM '          
                        + @TableName + @new_where2 + @PrimaryKey + ' > '          
                        + '(Select MAX(' + @PrimaryKey + ') FROM (Select TOP '          
                        + STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey          
                        + ' FROM ' + @TableName          
                        + @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2          
                        + ' ) AS TMP ' + @new_order1          
                    END          
            END          
        IF @SortType = 3  --多列排序，必须包含主键，且放置最后，否则不处理          
            BEGIN          
                IF CHARINDEX(',' + @PrimaryKey + ' ',',' + @Order) = 0          
                    BEGIN PRINT('ERR_02') RETURN END          
                    IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2  --正向检索          
                        BEGIN          
                            SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '          
                            + 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '          
                            + ' Select TOP ' + STR(@PageSize*@PageIndex) + ' ' + @FieldList          
                            + ' FROM ' + @TableName + @new_where1 + @new_order1 + ' ) AS TMP '          
                            + @new_order2 + ' ) AS TMP ' + @new_order1          
                        END          
                    ELSE  --反向检索          
                        BEGIN          
                            SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '          
                            + 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '          
                            + ' Select TOP ' + STR(@TotalCount-@PageSize *@PageIndex+@PageSize) + ' ' + @FieldList          
                            + ' FROM ' + @TableName + @new_where1 + @new_order2 + ' ) AS TMP '          
                            + @new_order1 + ' ) AS TMP ' + @new_order1          
                        END          
            END          
        END          
    PRINT(@SQL)          
    EXEC(@Sql) 



----------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------
sql测试:
--测试数据
--select count(*) from T_TEST
Create  TABLE  T_TEST(ID  INT  IDENTITY(1,1)  PRIMARY  KEY,CLASS_A  VARCHAR(50),CLASS_B  VARCHAR(50),ADD_DT  DATETIME)  
DECLARE  @I  INT  
Select  @I  =  1  
WHILE  @I  <  =  999998  
BEGIN  
Insert  INTO  T_TEST(CLASS_A,CLASS_B,ADD_DT)  
Select  CASE  @I%2  WHEN  0  THEN  'CLASS_A'  +  CAST(@I  AS  VARCHAR)  ELSE  CAST(@I  AS  VARCHAR)  END,  
CASE  @I%5  WHEN  0  THEN  'CLASS_B'  +  CAST(@I  AS  VARCHAR)  ELSE  CAST(@I  AS  VARCHAR)  END,  GETDATE()  
Select  @I  =  @I  +  1  
END  
Create  INDEX  _INDEX  ON  T_TEST(add_dt,id)  
使用：  以多列排序为例
第一页查询，  
第一页取出总记录和总页数，以后就不要从数据库里取了  
DECLARE  @T1  DATETIME,@T2  DATETIME  
DECLARE  @A  INT,@B  INT  
Select  @T1  =  GETDATE()  
EXEC  P_viewPage  'T_TEST','ID,ADD_DT','id','','add_dt  asc,id  asc',3,0,10,1,@A  out,@B  out  
Select  @T2  =  GETDATE()  
Select  CAST(DATEDIFF(ms,@T1,@T2)  AS  VARCHAR)+'ms'  
Select  @A,@B  
其它页(如第1161页)：  
DECLARE  @T1  DATETIME,@T2  DATETIME  
DECLARE  @A  INT,@B  INT  
Select  @T1  =  GETDATE()  
EXEC  P_viewPage  'T_TEST','ID,ADD_DT','id','','add_dt  asc,id  asc',3,999998,10,1161,null,null  
Select  @T2  =  GETDATE()  
Select  CAST(DATEDIFF(ms,@T1,@T2)  AS  VARCHAR)+'ms'  
--Select  @A,@B  

asp调用简单例子:
<%      Option Explicit%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
body{
      font-family: "宋体";
      font-size: 9pt;
      text-decoration: none;
      line-height: 150%;                                       
      margin: 0px;
      background-color: #A8C2F9;
     }
a:link    {  color: #000000; text-decoration: none}
a:visited {  color: #000000; text-decoration: none}
a:hover   {  color: #3333ff; text-decoration: none}
</style>
</head>
<body>

<%
     Dim strDbConn , Conn            
     strDBConn = "Provider=SQLOLEDB.1;Password=xxxxxxxxxx;Persist Security Info=True; " & _
                 "User ID=sa;Initial Catalog=DB_xxx;Data Source=RDG_NZ"
     Set Conn = Server.CreateObject("ADODB.Connection")

     Dim startime            
     startime=timer()

           Function PageView(pagecount,pagesize,page,recordercount) 
                 'pagecount   总页数
                 'pagesize    每页显示数量
                 'page        当前是第几页
                 'recordercount 总记录数量      
                 'get方式传值：      pagecount:总页数  recordercount:总记录数量
                 pagecount = Clng(pagecount)
                 pagesize = Clng(pagesize)
                 page = Clng(page)
                 recordercount = Clng(recordercount)
                 Dim query, a, x, temp ,action   
                       action = "http://" & Request.ServerVariables("HTTP_HOST") _
                             & Request.ServerVariables("SCRIPT_NAME")   
                       query = Split(Request.ServerVariables("QUERY_STRING"), "&")    
                       For Each x In query        
                             a = Split(x, "=")        
                             If StrComp(a(0), "page", vbTextCompare) <> 0 and _
                                   StrComp(a(0), "pagecount", vbTextCompare) <> 0  _
                                         and StrComp(a(0), "recordercount", vbTextCompare) <> 0 Then            
                                   temp = temp & a(0) & "=" & a(1) & "&"
                             End If    
                       Next        
                       
                       PageView = "<form method=get onsubmit=""document.location = '" _
                                               & action & "?" & temp & "Page='+this.page.value;return false;"">"      
        
                       If page<=1 then        
                             PageView = PageView & "[首页] [上一页] "    
                       Else                
                             PageView = PageView & "[<a href=" & action & "?" & temp & "Page=1>首页</a>] "       
                             PageView = PageView & "[<a href=" & action & "?" & temp & "Page=" & (Page-1) & _
                             "&pagecount="& pagecount &"&recordercount="& recordercount &">上一页</a>] " 
                       End If    
                       If page>=pagecount then        
                             PageView = PageView & "[下一页] [尾页] "            
                       Else        
                             PageView = PageView & "[<a href=" & action & "?" & temp & "Page=" & (Page+1) & _
                              "&pagecount="& pagecount &"&recordercount="& recordercount &">下一页</a>] "
                             PageView = PageView & "[<a href=" & action & "?" & temp & "Page="& pagecount & _
                              "&pagecount="& pagecount &"&recordercount="& recordercount &">尾页</a>] "
                       End If    
                       PageView = PageView & "[页次:<font color=red>" & page & "</font>/" & pageCount        
                       PageView = PageView & "] [共" & recordercount & "条 <font color=red>"& pagesize & _
                        "</font>条/页]"
                       PageView = PageView & " 转到" & "<input name=page size=4 value=" & page & _
                        ">" & "页<input type=submit value=go></form>"
           End Function

           Dim  TableName          '表名
           Dim  FieldList        '显示列名，如果是全部字段则为*
           Dim  PrimaryKey        '单一主键或唯一值键
           Dim  Where             '查询条件 不含'where'字符，如id>10 and len(userid)>9
           Dim  order                '排      序 不含'order by'字符，如id asc,userid desc，必须指定asc或desc
                                         '注意当Dim  SortType=3时生效，记住一定要在最后加上主键，否则会让你比较郁闷
           Dim  SortType       '排序规则 1:正序asc 2:倒序desc 3:多列排序方法
           Dim  RecorderCount  '记录总数 0:会返回总记录
           Dim  PageSize       '每页输出的记录数
           Dim  PageIndex      '当前页数
           Dim  TotalCount     '记返回总记录
           Dim  TotalPageCount '记返回总页数
     
           TableName = "T_TEST"
           FieldList = "*"
           PrimaryKey = "id"
           Where = "id>"& request("id")
           order = "id asc"
           SortType = "1"      
           If Request("recordercount")=""      Then
                 RecorderCount = "0"
           Else
                 RecorderCount = Request("recordercount")
           End If
           PageSize = "10"
           If Request("page")=""      Then
                 PageIndex = "1"
           Else
                 PageIndex = Request("page")
           End If            
           TotalCount = RecorderCount
           If Request("pagecount")=""      Then
                 TotalPageCount = "1"
           Else
                 TotalPageCount = Request("pagecount")
           End If                   
     
           Dim Cmd ,rs
           Set Cmd = Server.CreateObject("ADODB.Command")
           Set Rs = Server.CreateObject("ADODB.Recordset")
           Conn.Open strDBConn      
           With Cmd
                 .CommandText = "P_viewPage"
                 .CommandType = 4
                 .CommandTimeout = 0
                 .ActiveConnection = Conn      
                 .Parameters.Append .CreateParameter("@TableName",200,1,200,TableName)      
                 .Parameters.Append .CreateParameter("@FieldList",200,1,2000,FieldList)      
                 .Parameters.Append .CreateParameter("@PrimaryKey",200,1,100,PrimaryKey)
                 .Parameters.Append .CreateParameter("@Where",200,1,2000,Where)
                 .Parameters.Append .CreateParameter("@Order",200,1,1000,Order)
                 .Parameters.Append .CreateParameter("@SortType",3,1,,SortType)
                 .Parameters.Append .CreateParameter("@RecorderCount",3,1,,RecorderCount)
                 .Parameters.Append .CreateParameter("@PageSize",3,1,,PageSize)
                 .Parameters.Append .CreateParameter("@PageIndex",3,1,,PageIndex)
                 .Parameters.Append .CreateParameter("@TotalCount",3,3,,TotalCount)
                 .Parameters.Append .CreateParameter("@TotalPageCount",3,3,,TotalPageCount)
                 Set rs = .Execute
                 If Not rs.Eof Then
                       while not rs.Eof
                             Rem 输出你的记录集内容
                             Response.Write rs(0) & "  ||  " & rs(1) & "<br>"
                       rs.MoveNext
                       wend
                 End If
                 rs.Close
                 TotalCount = .Parameters("@TotalCount")
                 TotalPageCount = .Parameters("@TotalPageCount")
           End With
           Set Rs = Nothing
           Set Cmd = Nothing
           Conn.Close
           Set Conn = Nothing
           Response.write PageView(TotalPageCount,pagesize,PageIndex,TotalCount)

           Dim endtime            
           endtime=timer()
%>
           
           <br>页面执行时间：<%=FormatNumber((endtime-startime)*1000,3)%>毫秒
</body>
</html>