小 小叶子 Unregistered / Unconfirmed GUEST, unregistred user! 2002-12-11 #1 if Form1.Components is TEdit then Form1.Components as TEdit; 提示下划线的地方有错！
J jsxjd Unregistered / Unconfirmed GUEST, unregistred user! 2002-12-11 #2 这不是一个完整的语句： Form1.Components as TEdit; showmessage((Form1.Components as TEdit).Name);
Q qianwt Unregistered / Unconfirmed GUEST, unregistred user! 2002-12-11 #3 var Edit: TEdit begin if Form1.Components is TEdit then [red]Edit := [/red]Form1.Components as TEdit; end;
var Edit: TEdit begin if Form1.Components is TEdit then [red]Edit := [/red]Form1.Components as TEdit; end;
W wlmmlw Unregistered / Unconfirmed GUEST, unregistred user! 2002-12-11 #4 var aEdit: TEdit; //----------------------------------- aEdit := Form1.Components as TEdit; //-----------------------------------
var aEdit: TEdit; //----------------------------------- aEdit := Form1.Components as TEdit; //-----------------------------------
W wr960204 Unregistered / Unconfirmed GUEST, unregistred user! 2002-12-11 #5 var Edit:TEdit; begin ... if Form1.Components is TEdit then edit:= TEdit(Form1.Components);//这种强制转换要比AS快一些
var Edit:TEdit; begin ... if Form1.Components is TEdit then edit:= TEdit(Form1.Components);//这种强制转换要比AS快一些
