【轉】ASP.NET 高效分頁存儲過程

代碼

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Create PROCEDURE [dbo].[proc_ListPage]
(
@tblName     nvarchar(200),        ----要顯示的表或多個表的鏈接
@fldName     nvarchar(500) = '*',    ----要顯示的字段列表
@pageSize    int = 1,        ----每頁顯示的記錄個數
@page        int = 10,        ----要顯示那一頁的記錄
@pageCount    int = 1 output,            ----查詢結果分頁後的總頁數
@Counts    int = 1 output,                ----查詢到的記錄數
@fldSort    nvarchar(200) = null,    ----排序字段列表或條件
@Sort        bit = 1,        ----排序方法，0爲升序，1爲降序(若是是多字段排列Sort指代最後一個排序字段的排列順序(最後一個排序字段不加排序標記)--程序傳參如：' SortA Asc,SortB Desc,SortC ')
@strCondition    nvarchar(1000) = null,    ----查詢條件,不需where
@ID        nvarchar(150),        ----主表的主鍵
@Dist                 bit = 0           ----是否添加查詢字段的 DISTINCT 默認0不添加/1添加
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar(1000)        ----存放動態生成的SQL語句
Declare @strTmp nvarchar(1000)        ----存放取得查詢結果總數的查詢語句
Declare @strID     nvarchar(1000)        ----存放取得查詢開頭或結尾ID的查詢語句

Declare @strSortType nvarchar(10)    ----數據排序規則A
Declare @strFSortType nvarchar(10)    ----數據排序規則B

Declare @SqlSelect nvarchar(50)         ----對含有DISTINCT的查詢進行SQL構造
Declare @SqlCounts nvarchar(50)          ----對含有DISTINCT的總數查詢進行SQL構造


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



--------生成查詢語句--------
--此處@strTmp爲取得查詢結果數量的語句
if @strCondition is null or @strCondition=''     --沒有設置顯示條件
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

----取得查詢結果總數量-----
exec sp_executesql @strTmp,N'@Counts int out ',@Counts out
declare @tmpCounts int
if @Counts = 0
    set @tmpCounts = 1
else
    set @tmpCounts = @Counts

    --取得分頁總數
    set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize

    /**//**當前頁大於總頁數 取最後一頁**/
    if @page>@pageCount
        set @page=@pageCount

    --/*-----數據分頁2分處理-------*/
    declare @pageIndex int --總數/頁大小
    declare @lastcount int --總數%頁大小 

    set @pageIndex = @tmpCounts/@pageSize
    set @lastcount = @tmpCounts%@pageSize
    if @lastcount > 0
        set @pageIndex = @pageIndex + 1
    else
        set @lastcount = @pagesize

    --//***顯示分頁
    if @strCondition is null or @strCondition=''     --沒有設置顯示條件
    begin
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分數據處理
            begin 
                set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' where '+@ID+' not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
                        +' order by '+ @fldSort +' '+ @strFSortType+')'
                        +' order by '+ @fldSort +' '+ @strFSortType 
            end
        else
            begin
            set @page = @pageIndex-@page+1 --後半部分數據處理
                if @page <= 1 --最後一頁數據顯示
                    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+' not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
                        +' order by '+ @fldSort +' '+ @strSortType+')'

                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
            end
    end

    else --有查詢條件
    begin
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分數據處理
        begin 
                set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName +' from  '+@tblName
                    +' where '+@ID+' not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
                    +' Where (1>0) ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType+')'
                    +' ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType                 
        end
        else
        begin 
            set @page = @pageIndex-@page+1 --後半部分數據處理
            if @page <= 1 --最後一頁數據顯示
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' where (1>0) '+ @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+' not in('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
                        +' where (1>0) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+')'
                        + @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
        end    
    end

------返回查詢結果-----
exec sp_executesql @strTmp
--print @strTmp
SET NOCOUNT OFF

轉自：錢途無樑，不過我還沒試哦，先收藏