学习官方示例 SysUtils.EncodeDate、EncodeTime、StrToDate、StrToTime、StrToDateTime

代码文件:

---

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    ListBox1: TListBox;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  D: TDate;
  T: TTime;
begin
  D := EncodeDate(2008, 9, 11);
  T := EncodeTime(14, 56, 12, 1);

  ListBox1.Clear;
  ListBox1.Items.Add(FormatDateTime('yyyy/mm/dd', D));
  ListBox1.Items.Add(FormatDateTime('hh:nn:ss:zzz', T));
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  D: TDate;
  T: TTime;
  DT: TDateTime;
begin
  D := StrToDate('2008-9-11');
  T := StrToTime('14:56:06');
  DT := StrToDateTime('2008-9-11 14:56:06');

  ListBox1.Clear;
  ListBox1.Items.Add(DateToStr(D));
  ListBox1.Items.Add(TimeToStr(T));
  ListBox1.Items.Add(DateTimeToStr(DT));
end;

end.

窗体文件:

---

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 93
  ClientWidth = 249
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 158
    Top = 14
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
  object ListBox1: TListBox
    Left = 0
    Top = 0
    Width = 145
    Height = 93
    Align = alLeft
    ItemHeight = 13
    TabOrder = 1
    ExplicitHeight = 206
  end
  object Button2: TButton
    Left = 158
    Top = 53
    Width = 75
    Height = 25
    Caption = 'Button2'
    TabOrder = 2
    OnClick = Button2Click
  end
end