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在Access中模拟sql server存储过程翻页

 2006-06-11 20:23:25 来源:WEB开发网   
核心提示:sql server中翻页存储过程:Create PROC blog_GetPagedPosts( @PageIndex int, @PageSize int, @BlogID int=0, @PostType int=-1, @CategoryID int=-1, @Hiding bit =0, @Count

sql server中翻页存储过程:
Create      PROC blog_GetPagedPosts
(
 @PageIndex int,
 @PageSize int,
 @BlogID  int=0,
 @PostType int=-1,
  @CategoryID int=-1,
  @Hiding   bit =0,
  @Count   int output
    
)
as
DECLARE @PageLowerBound int
DECLARE @PageUpperBound int
SET @PageLowerBound = @PageSize * @PageIndex - @PageSize
SET @PageUpperBound = @PageLowerBound + @PageSize + 1

Create Table #IDs
(
 TempID int IDENTITY (1, 1) NOT NULL,
 EntryID int not null
)
Insert  into #IDs(EntryID)  select DISTINCT [ID] from view_Content  where CategoryID=@CategoryID and blogID=@BlogID  order by [ID] desc
SELECT  vc.*
FROM  View_Content vc
   INNER JOIN #IDS tmp ON (vc .[ID] = tmp.EntryID)
WHERE  tmp.TempID > @PageLowerBound
 AND tmp.TempID < @PageUpperBound and vc.Hiding=0
ORDER BY tmp.TempID
SELECT @Count=COUNT(*) FROM  #IDS
SELECT @Count=COUNT(*) FROM  #IDS
DROP TABLE #IDS
return @Count
GO

在access中由于不支持存储过程,不能建立临时表只能在程序中实现
Access中实现如下,这也是我在myblog Access版中使用的:
public List<DayBook> GetPagedPost(PagedPost p, out int TotalRecords)
     {
       List<DayBook> list = new List<DayBook>();

     using (OleDbConnection conn = GetOleDbConnection())
       {
         StringBuilder sql = new StringBuilder();
         sql.AppendFormat("select  [ID] from blog_Content as p ");//构造查询条件
         if (p.CategoryID > 0)
         {
           sql.AppendFormat(",blog_Categories AS c, blog_Links AS l WHERE c.CategoryID=l.CategoryID and (p.ID=l.PostID ) and c.CategoryID={1} and p.BlogID={0}  ",p.BlogID, p.CategoryID);
         }
         else
         {
           sql.AppendFormat(" where p.blogID={0} ", p.BlogID);
         }
         if (p.PostType != PostType.Undeclared)
         {
           sql.AppendFormat(" and p.PostType={0} ", (int)p.PostType);
         }
         sql.Append(" order by p.[DateUpdated] desc");
        // NetDiskContext.Current.Context.Response.Write(sql.ToString());
         //NetDiskContext.Current.Context.Response.End();
         OleDbCommand MyComm = new OleDbCommand(sql.ToString(), conn);
         List<int> IDs = new List<int>(); //获取主题ID列表
         conn.Open();
         using (OleDbDataReader dr = MyComm.ExecuteReader())
         {
           while (dr.Read())
           {
             IDs.Add((int)dr[0]);
          
           }
         }
       
         TotalRecords=IDs.Count;//返回记录总数
         if (TotalRecords < 1)
           return list;
         int pageLowerBound = p.PageSize * p.PageIndex - p.PageSize;//记录索引
         int pageUpperBound = pageLowerBound + p.PageSize ;
         StringBuilder sb = new StringBuilder();
         if (TotalRecords >= pageLowerBound)
           for (int i = pageLowerBound; i < TotalRecords && i < pageUpperBound; i++)
           {
             sb.AppendFormat("{0},", IDs[i]);//构造ID in() 条件,取其中一页
           }
         else return list; //如没有记录返回空表
         if(sb.Length>1)
         sb.Remove(sb.Length - 1, 1);//删除最后一个逗号
       MyComm.CommandText = string.Format("SELECT b.* , c.Account as Account FROM blog_Content b, Blog_Config  c where b.BlogID=c.BlogID and b.[ID] in ({0}) order by b.dateadded desc", sb.ToString());
         using (OleDbDataReader dr = MyComm.ExecuteReader())
         {
           while (dr.Read())
           {
             list.Add(DataHelp.LoadDayBook(dr));
           }
         }
         return list;
       }
     }

 转帖请注明出处..深Q

Tags:Access 模拟 sql

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