unit4.~pas

学生管理信息系统

unit Unit4;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, DB, Grids, DBGrids, DBTables, Menus, DBCtrls;

type
  TForm4 = class(TForm)
    Query1: TQuery;
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    MainMenu1: TMainMenu;
    N1: TMenuItem;
    N2: TMenuItem;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Edit3: TEdit;
    Edit4: TEdit;
    Edit5: TEdit;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    GroupBox1: TGroupBox;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    DBText1: TDBText;
    DBText2: TDBText;
    DBText3: TDBText;
    DBText4: TDBText;
    DBText5: TDBText;
    procedure Button3Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure N2Click(Sender: TObject);
    procedure N4Click(Sender: TObject);
    procedure N7Click(Sender: TObject);
    procedure N5Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

uses Unit3;

{$R *.dfm}

procedure TForm4.Button3Click(Sender: TObject);
begin
with Query1 do
begin
close;
SQL.clear;
SQL.add('select * from 班级1');
prepare;
open;
end;
end;
procedure TForm4.Button1Click(Sender: TObject);
begin
with Query1 do
begin
close;
SQL.clear;
SQL.add('select * from 班级1');
SQl.add(' where 姓名=:p1');
ParamByname('p1').Asstring:= edit1.text;
prepare;
open;
end;
end;
procedure TForm4.Button2Click(Sender: TObject);
begin
with Query1 do
begin
close;
SQL.clear;
SQL.add('select * from 班级1');
SQl.add(' where 学号=:p1');
ParamByname('p1').Asstring:= edit2.text;
prepare;
open;
end;
end;


procedure TForm4.N2Click(Sender: TObject);
begin
close();
end;

procedure TForm4.N4Click(Sender: TObject);
begin
form3.show;
end;

procedure TForm4.N7Click(Sender: TObject);
begin
form4.show;
end;

procedure TForm4.N5Click(Sender: TObject);
begin
query1.delete;
end;

procedure TForm4.Button4Click(Sender: TObject);
begin
with Query1 do
begin
close;
SQL.clear;
SQL.add('select * from 班级1');
SQl.add(' where 班级=:p1');
ParamByname('p1').Asstring:= edit3.text;
prepare;
open;
end;
end;

procedure TForm4.Button5Click(Sender: TObject);
begin
with Query1 do
begin
close;
SQL.clear;
SQL.add('select * from 班级1');
SQl.add(' where 性别=:p1');
ParamByname('p1').Asstring:= edit5.text;
prepare;
open;
end;
end;

procedure TForm4.Button6Click(Sender: TObject);
begin
with Query1 do
begin
close;
SQL.clear;
SQL.add('select * from 班级1');
SQl.add(' where 籍贯=:p1');
ParamByname('p1').Asstring:= edit4.text;
prepare;
open;
end;
end;

end.