DateOf、TimeOf、YearOf、MonthOf、WeekOf、DayOf、HourOf、MinuteOf、SecondOf、MilliSecondOf – 提取时间成分

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所属分类:[开发技巧]

它们的参数都是一个 TDateTime,
DateOf、TimeOf 分别提取日期与时间, 并返回 TDateTime 类型;
YearOf、MonthOf、WeekOf、DayOf、HourOf、MinuteOf、SecondOf、MilliSecondOf 返回的都是 Word 类型.

unit Unit1;

interface

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

type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

uses DateUtils;

procedure TForm1.FormCreate(Sender: TObject);
var
dt,d,t: TDateTime;
Year,Month,Week,Day,Hour,Minute,Second,MilliSecond: Word;
begin
dt := StrToDateTime('2009-5-20 11:22:33');

d := DateOf(dt);
ShowMessage(DateToStr(d)); //2009-5-20


t := TimeOf(dt);
ShowMessage(TimeToStr(t)); //11:22:33

Year := YearOf(dt);
Month := MonthOf(dt);
Week := WeekOf(dt);
Day := DayOf(dt);
Hour := HourOf(dt);
Minute := MinuteOf(dt);
Second := SecondOf(dt);
MilliSecond := MilliSecondOf(dt);

ShowMessageFmt('%d,%d,%d,%d,%d,%d,%d,%d', [Year,Month,Week,Day,Hour,Minute,
Second,MilliSecond]); {2009,5,20,11,22,33,0}
end;

end.

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