unit7.pas

Delphi 7基础编程的源代码

unit Unit7;

interface

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

type
  Tupdatepassform = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Label3: TLabel;
    Edit3: TEdit;
    Label2: TLabel;
    Edit2: TEdit;
    GroupBox1: TGroupBox;
    Label1: TLabel;
    edit1: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
    times : integer;
  public
    { Public declarations }
  end;

var
  updatepassform: Tupdatepassform;

implementation

{$R *.dfm}

procedure Tupdatepassform.Button1Click(Sender: TObject);
  var
    passfile : textfile;
    passstr : string;
begin
  assignfile(passfile,'c:\passward\master.txt');
  reset(passfile);
  readln(passfile,passstr);
  times:=times+1;
  if edit1.Text=passstr then
     begin
       if edit2.Text = edit3.Text then
          begin
            rewrite(passfile);
            writeln(passfile,edit2.text);
            closefile(passfile);
            edit1.text:='';
            edit2.text:='';
            edit3.Text:='';
          end
       else
         MessageDlg('对不起，两次密码输入不相同',mtInformation,[mbOk],0);
     end
  else
    begin
      if MessageDlg('原密码输入错误,是否退出？',mtConfirmation,[mbYes,mbNo],0)
         =mryes then close
      else if times<5 then
         edit1.SetFocus
      else
       begin
        MessageDlg('对不起，密码输入错误达到5次！请退出。',mtInformation,[mbOk],0);
        application.Terminate;
       end;
    end;
end;

procedure Tupdatepassform.Button2Click(Sender: TObject);
  var
    passfile : textfile;
    passstr : string;
begin
  assignfile(passfile,'c:\passward\reader.txt');
  reset(passfile);
  readln(passfile,passstr);
  times:=times+1;
  if edit1.Text=passstr then
     begin
       if edit2.Text = edit3.Text then
          begin
            rewrite(passfile);
            writeln(passfile,edit2.text);
            closefile(passfile);
            edit1.Text:='';
            edit2.text:='';
            edit3.Text:='';
          end
       else
         MessageDlg('对不起，两次密码输入不相同',mtInformation,[mbOk],0);
     end
  else
    begin
      if MessageDlg('原密码输入错误,是否退出？',mtConfirmation,[mbYes,mbNo],0)
         =mryes then close
      else if times<5 then
         edit1.SetFocus
      else
       begin
        MessageDlg('对不起，密码输入错误达到5次！请退出。',mtInformation,[mbOk],0);
        application.Terminate;
       end;
    end;
end;

procedure Tupdatepassform.Button3Click(Sender: TObject);
begin
  updatepassform.Close;
end;

end.