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unit UpperCaseAndLowerCase;
interface uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls; type TForm5 = class(TForm) lbl1: TLabel; edt1: TEdit; lbl2: TLabel; edt2: TEdit; lbl3: TLabel; edt3: TEdit; procedure edt1Change(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form5: TForm5; implementation {$R *.dfm} procedure TForm5.edt1Change(Sender: TObject); begin edt3.Text:= UpperCase(edt1.text); // 字符串转换成大写 edt2.Text := LowerCase(edt1.Text); // 字符串转换成小写 end; end. |
原文:http://www.cnblogs.com/kivin/p/4646973.html