Question

点击StringGrid的滚动条会产生什么事件

Answer 1

把DBGrids.pas里的这玩意改一下，不过你要备份，本人也不会，一切后果自负，折腾吧
procedure TCustomDBGrid.WMVScroll(var Message: TWMVScroll);
var
SI: TScrollInfo;
begin
if not AcquireFocus then Exit;
if FDatalink.Active then
with Message, FDataLink.DataSet do
case ScrollCode of
SB_LINEUP: FDataLink.MoveBy(-FDatalink.ActiveRecord - 1);
SB_LINEDOWN: FDataLink.MoveBy(FDatalink.RecordCount - FDatalink.ActiveRecord);
SB_PAGEUP: FDataLink.MoveBy(-VisibleRowCount);
SB_PAGEDOWN: FDataLink.MoveBy(VisibleRowCount);
SB_THUMBPOSITION:
begin
if IsSequenced then
begin
SI.cbSize := sizeof(SI);
SI.fMask := SIF_ALL;
GetScrollInfo(Self.Handle, SB_VERT, SI);
if SI.nTrackPos <= 1 then First
else if SI.nTrackPos >= RecordCount then Last
else RecNo := SI.nTrackPos;
end
else
case Pos of
0: First;
1: FDataLink.MoveBy(-VisibleRowCount);
2: Exit;
3: FDataLink.MoveBy(VisibleRowCount);
4: Last;
end;
end;
SB_BOTTOM: Last;
SB_TOP: First;
end;
end;