delphi IsSameDay、IsToday - 判断是不是同一天、判断是不是今天


IsSameDay、IsToday - 判断是不是同一天、判断是不是今天
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
t1,t2,t3,t4: TDateTime;
b: Boolean;
begin
t1 := StrToDateTime('2009-1-21');
t2 := StrToDateTime('2009-1-21');
t3 := StrToDateTime('2009-5-21');
t4 := Now;

{判断是不是同一天}
b := IsSameDay(t1, t2); //True
b := IsSameDay(t1, t3); //False

{判断给定时间和当前时间是不是同一天}
b := IsToday(t1); //False
b := IsToDay(t4); //True

// ShowMessage(BoolToStr(b, True));
end;

end.

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