Protected: 在 Protected 區域宣告的 內部資料或方法,只有在目前的物件類別或 它的繼承物件類別(inherited class)才可存取 Override method 在子物件類別(descendent class),若要覆蓋(Override)父物件類別 (ancentor class)的方法(method), 請問TDbgrid不是從TCustomGrid繼承而來得嗎?? 為何無法使用 function GetEditText(ACol, ARow: Longint): string; override; 基本觀念不足,請前輩們賜教

Any problem??? BTW, TDBGrid -> TCustomDBGrid -> TCustomGrid .... and GetEditText has been overriden in TCustomDBGrid...

引言: Any problem??? BTW, TDBGrid -> TCustomDBGrid -> TCustomGrid .... and GetEditText has been overriden in TCustomDBGrid...

那是不是代表一但被overriden ,在繼承的後代物件就不可使用此function

[quote]那是不是代表一但被overriden ,在繼承的後代物件就不可使用此function/quote] No, you can use it... Could you give more details on your problem? I have no idea what it is....

我的問題是為何不可以直接寫成 DBGrid1.GetEditText 在http://delphi.ktop.com.tw/topic.php?topic_id=37933 一定要定義一個 DumClass = class(TCustomGrid); strtofloat(DumClass(DBGrid1).GetEditText(MG.X,CG.Y));

引言: 我的問題是為何不可以直接寫成 DBGrid1.GetEditText 在http://delphi.ktop.com.tw/topic.php?topic_id=37933 一定要定義一個 DumClass = class(TCustomGrid); strtofloat(DumClass(DBGrid1).GetEditText(MG.X,CG.Y));

Protected method is not going to be used by the 'user'. In Delphi, all classes within the same unit can have full access to other classes (even private and protected area)... So this is essential a trick to access the protected area in TDBGrid.