unit2.pas

商品销售管理系统

unit Unit2;

interface

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

type
  TForm2 = class(TForm)
    GroupBox1: TGroupBox;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit2: TEdit;
    Edit3: TEdit;
    Label4: TLabel;
    Edit4: TEdit;
    Button1: TButton;
    Button2: TButton;
    Table1: TTable;
    Query1: TQuery;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;
  logname: string;
  password: string;
  flag: boolean;

implementation

uses Unit1;

{$R *.dfm}

procedure TForm2.Button1Click(Sender: TObject);
begin
 begin
  flag:=false;
  logname:=edit1.Text;
  password:=edit2.Text;
  table1.Open;
  table1.First;
  while not Table1.Eof do
  begin
    if (logname = table1.Fields[0].AsString) and (password = table1.Fields[1].AsString) then
    flag:=true;
   table1.Next;
  end;
  begin
  if flag then
 begin
  if edit3.Text=edit4.Text then
   begin
   with query1 do
begin
  close;
  sql.clear;
sql.add('update 登录表 set 密码= :密码');
parambyname('密码').asstring := edit3.Text;
execsql;
edit3.Clear;
edit4.Clear;
edit1.Clear;
edit2.Clear;
end;

  showmessage('修改完毕！');
end
else
     begin
     showmessage('两次输入密码不一致');

     end;
    end
     else
     showmessage('没有此用户');
     end;
     table1.close;

     end;
     end;
  procedure TForm2.Button2Click(Sender: TObject);
begin
form2.Close;
form1.show;
end;

end.