WeeksInAYear、WeeksInYear、DaysInAYear、DaysInAMonth、DaysInYear、DaysInMonth - 获取指定年月的周、日数

DateUtils.DaysInYear();

DateUtils.DaysInMonth();

DateUtils.DaysInAYear();

DateUtils.DaysInAMonth();

DateUtils.WeeksInYear();

DateUtils.WeeksInAYear();


 
   

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    procedure FormCreate(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



uses DateUtils;



procedure TForm1.FormCreate(Sender: TObject);

var

  dt: TDateTime;

  w: Word;

begin

  dt := StrToDateTime('2009-5-20 11:22:33');



  {指定日期所在年的总天数}

  w := DaysInYear(dt);        //365



  {指定日期所在月的总天数}

  w := DaysInMonth(dt);       //31



  {指定年的总天数}

  w := DaysInAYear(2009);     //365



  {指定年、指定月的总天数}

  w := DaysInAMonth(2009, 5); //31



  {指定日期所在年的总周数}

  w := WeeksInYear(dt);       //53



  {指定年的总周数}

  w := WeeksInAYear(2009);    //53

end;



end.

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DateUtils-Function

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