unit1.pas

学生缴费管理系统是以面向对象的观点进行开发的。根据对学生缴费信息与软件要求所做分析然后利用DELPHI开发出来的软件

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls,unit2, DB, DBTables;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Button2: TButton;
    Query1: TQuery;
    DataSource1: TDataSource;
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button2Click(Sender: TObject);
begin
    query1.Close;
query1.SQL.Clear;
query1.SQL.Add('select * from 用户');
query1.SQL.Add('where 用户名='''+edit1.text+'''');
query1.Prepare;
query1.open;

if query1.RecordCount>0 then
begin
      if query1['密码']=edit2.Text then
       begin
      form2.Show;
      form1.Hide;
      end
     else
     showmessage('密码有误！！！');
        edit2.Text:='';
           end
     else
     showmessage('输入有误！！！');
        edit1.Text:='';
       edit2.Text:='';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
close;
end;

end.