--www.flyso.cn
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
Create Procedure [dbo].[flyso_Page2005]
@TableName varchar(50),        --表名
@Fields varchar(5000) = '*',    --字段名(全部字段为*)
@OrderField varchar(5000),        --排序字段(必须!支持多字段)
@sqlWhere varchar(5000) = Null,--条件语句(不用加where)
@pageSize int,                    --每页多少条记录
@pageIndex int = 1 ,            --指定当前为第几页
@TotalPage int output,            --返回总页数
@totalRecord int output
as
begin

    Begin Tran --开始事务

    Declare @sql nvarchar(4000);
    --Declare @totalRecord int output;    

    --计算总记录数
        
    if (@SqlWhere='' or @sqlWhere=NULL)
        set @sql = 'select @totalRecord = count(*) from ' + @TableName
    else
        set @sql = 'select @totalRecord = count(*) from ' + @TableName + ' where ' + @sqlWhere

    EXEC sp_executesql @sql,N'@totalRecord int OUTPUT',@totalRecord OUTPUT--计算总记录数        
    
    --计算总页数
    select @TotalPage=CEILING((@totalRecord+0.0)/@PageSize)

    if (@SqlWhere='' or @sqlWhere=NULL)
        set @sql = 'Select * FROM (select ROW_NUMBER() Over(order by ' + @OrderField + ') as rowId,' + @Fields + ' from ' + @TableName
    else
        set @sql = 'Select * FROM (select ROW_NUMBER() Over(order by ' + @OrderField + ') as rowId,' + @Fields + ' from ' + @TableName + ' where ' + @SqlWhere    
        
    
    --处理页数超出范围情况
    if @PageIndex<=0
        Set @pageIndex = 1
    
    if @pageIndex>@TotalPage
        Set @pageIndex = @TotalPage

     --处理开始点和结束点
    Declare @StartRecord int
    Declare @EndRecord int
    
    set @StartRecord = (@pageIndex-1)*@PageSize + 1
    set @EndRecord = @StartRecord + @pageSize - 1

    --继续合成sql语句
    set @Sql = @Sql + ') as ' + @TableName + ' where rowId between ' + Convert(varchar(50),@StartRecord) + ' and ' +  Convert(varchar(50),@EndRecord)
    
    Exec(@Sql)
    ---------------------------------------------------
    If @@Error <> 0
      Begin
        RollBack Tran
        Return -1
      End
     Else
      Begin
        Commit Tran
        Return @totalRecord ---返回记录总数
      End    
end