unit4.~pas

学生学籍管理 delphi+sql2000 合力制作

unit Unit4;

interface

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

type
  TForm4 = class(TForm)
    Label1: TLabel;
    DBGrid1: TDBGrid;
    Button1: TButton;
    Button2: TButton;
    ADOQuery1: TADOQuery;
    Edit1: TEdit;
    Button3: TButton;
    DataSource1: TDataSource;
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}
 uses unit2;
procedure TForm4.Button2Click(Sender: TObject);
begin
  self.Hide;
  Form2.Show;
  self.Close;
end;

procedure TForm4.Button1Click(Sender: TObject);
begin
   ADOQuery1.Close;
   ADOQuery1.SQL.Clear;
   ADOQuery1.SQL.Add('select * from studentinformation where 学号 =:num') ;
   ADOQuery1.Parameters.ParamByName('num').Value := edit1.Text;
   ADOQuery1.Open;
   if Adoquery1.recordcount = 0 then
   begin
    showmessage('没有你所要查询的资料，请核对后重试！') ;
    edit1.Clear;
    exit;
  end;

end;

procedure TForm4.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
  if Key = #13 then
    begin
    Button1.SetFocus;
    Button1Click(self);
    end;
end;

end.