unit1.pas

获取字符长度,通过此控制你可以读取得到字符长度,很利于程序设计.

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  mystr:string;//定义字符串
  strlength:integer;
begin
  setlength(mystr,5);//将字符串定义为5个字节的长度
  strlength:=length(mystr);//取得字符串长度
  showmessage(inttostr(strlength));//显示字符串长度
end;

end.