unit11.pas

本人是个新手

unit Unit11;

interface

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

type
  TclassForm = class(TForm)
    DataSource1: TDataSource;
    Table1: TTable;
    Query1: TQuery;
    SpeedButton1: TSpeedButton;
    SpeedButton2: TSpeedButton;
    SpeedButton3: TSpeedButton;
    SpeedButton4: TSpeedButton;
    SpeedButton5: TSpeedButton;
    DBGrid1: TDBGrid;
    Label1: TLabel;
    Edit1: TEdit;
    SpeedButton6: TSpeedButton;
    GroupBox1: TGroupBox;
    SpeedButton7: TSpeedButton;
    Label2: TLabel;
    Edit2: TEdit;
    Label3: TLabel;
    Edit3: TEdit;
    Label4: TLabel;
    Edit4: TEdit;
    Label5: TLabel;
    Edit5: TEdit;
    procedure SpeedButton6Click(Sender: TObject);
    procedure SpeedButton7Click(Sender: TObject);
    procedure SpeedButton5Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  classForm: TclassForm;

implementation

{$R *.dfm}

procedure TclassForm.SpeedButton6Click(Sender: TObject);
begin
if edit1.Text =''then
 begin
 showmessage('请输入班级名');
 end
else
  query1.SQL.Clear;
  query1.SQL.Add('select * from 班级信息');
  query1.SQL.Add('where 班级名='''+edit1.Text+'''');
  query1.Close;
  query1.open;
end;
procedure TclassForm.SpeedButton7Click(Sender: TObject);
begin
query1.SQL.Clear;
query1.SQL.Add('select * from 班级信息');
query1.Close;
query1.Open;
end;

procedure TclassForm.SpeedButton5Click(Sender: TObject);
begin
close;
end;

end.