procedure TForm1.BtnConnClick(Sender: TObject);
begin
//ADOConnection连接,略
end;
procedure TForm1.PageFirst;
begin
with adoquery1 do
begin
close;
sql.Clear;
sql.Text := 'select top ' + IntToStr(PerPage) + ' * from 表 order by ID';
open;
end;
Page := 1;
end;
procedure TForm1.PageScroll;
begin
with adoquery1 do
begin
close;
sql.Clear;
sql.Text := 'select top ' + IntToStr(PerPage) + ' * from 表 where ID not in (select top ' + IntToStr((Page) * PerPage) + ' ID from 表 order by ID) order by ID';
open;
end;
end;
procedure TForm1.BtnFirstClick(Sender: TObject);//连接后,首先点击此“第一页”按钮
begin
PageFirst;
end;
procedure TForm1.BtnNextClick(Sender: TObject);//“下一页”
begin
PageScroll;
Inc(Page);
end;
procedure TForm1.BtnFrontClick(Sender: TObject);//“前一页”
begin
if Page = 0 then begin PageFirst; Page := 1; exit; end;
PageScroll;
Dec(Page);
end;
declare @strSQL varchar(5000) -- 主语句
declare @strTmp varchar(110) -- 临时变量
declare @strOrder varchar(400) -- 排序类型
if @doCount != 0
begin
if @strWhere !=''
set @strSQL = "select count(*) as Total from [" + @tblName + "] where "+@strWhere
else
set @strSQL = "select count(*) as Total from [" + @tblName + "]"
end
--以上代码的意思是如果@doCount传递过来的不是0,就执行总数统计。以下的所有代码都是@doCount为0的情况
else
begin
if @OrderType != 0
begin
set @strTmp = "<(select min"
set @strOrder = " order by [" + @fldName +"] desc"
--如果@OrderType不是0,就执行降序,这句很重要!
end
else
begin
set @strTmp = ">(select max"
set @strOrder = " order by [" + @fldName +"] asc"
end
if @PageIndex = 1
begin
if @strWhere != ''
set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ " from [" + @tblName + "] where " + @strWhere + " " + @strOrder
else
set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ " from ["+ @tblName + "] "+ @strOrder
--如果是第一页就执行以上代码,这样会加快执行速度
end
else
begin
--以下代码赋予了@strSQL以真正执行的SQL代码
set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ " from ["
+ @tblName + "] where [" + @fldName + "]" + @strTmp + "(["+ @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["+ @fldName + "] from [" + @tblName + "]" + @strOrder + ") as tblTmp)"+ @strOrder
if @strWhere != ''
set @strSQL = "select top " + str(@PageSize) +" "+@strGetFields+ " from ["
+ @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
+ @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
+ @fldName + "] from [" + @tblName + "] where " + @strWhere + " "
+ @strOrder + ") as tblTmp) and " + @strWhere + " " + @strOrder
end
end
exec (@strSQL)
GO