unit9.~pas

学生学籍管理 delphi+sql2000 合力制作

unit Unit9;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Mask, DBCtrls, DB, ADODB, StdCtrls;

type
  TForm9 = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Label1: TLabel;
    DataSource1: TDataSource;
    ADOQuery1: TADOQuery;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    DBEdit5: TDBEdit;
    DBEdit6: TDBEdit;
    DBEdit7: TDBEdit;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form9: TForm9;

implementation

{$R *.dfm}
uses unit2;
procedure TForm9.Button1Click(Sender: TObject);
begin
if Edit1.Text = '' then
  begin
    showmessage('没有你所要查询的资料，请核对后重试！') ;
    edit1.Clear;
    exit;
  end
  else
  begin
     ADOQuery1.SQL.Clear;
     ADOQuery1.SQL.Add('select * from grade where 学生学号 =' + Edit1.Text);
     ADOQuery1.Open;
     DBEdit1.Enabled := False;
     DBEdit2.Enabled := False;
     DBEdit3.Enabled := False;
     DBEdit4.Enabled := False;
     DBEdit5.Enabled := False;
     DBEdit6.Enabled := False;
     DBEdit7.Enabled := False;
     Button3.Enabled := False;
  end;
end;


procedure TForm9.Button2Click(Sender: TObject);
begin
  if edit1.Text = '' then
  begin
    showmessage('操作错误!') ;
    edit1.Clear;
    exit;
  end
  else
    begin
      ADOQuery1.Edit;
      DBEdit1.Enabled := True;
      DBEdit2.Enabled := True;
      DBEdit3.Enabled := True;
      DBEdit4.Enabled := True;
      DBEdit5.Enabled := True;
      DBEdit6.Enabled := True;
      DBEdit7.Enabled := True;
      Button3.Enabled := True;
  end;
end;

procedure TForm9.Button3Click(Sender: TObject);
begin
  if edit1.Text = '' then
  begin
    showmessage('操作错误!') ;
    edit1.Clear;
    exit;
  end
  else
  begin
    ADOQuery1.Post;
    showmessage('成绩已修改!');
    Button3.Enabled := False;
  end;
end;
procedure TForm9.Button4Click(Sender: TObject);
begin
  self.Hide;
  Form2.Show;
  self.close;
end;

procedure TForm9.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if Key = #13 then
  begin
    Button1.SetFocus;
    Button1Click(self);
  end;
end;

end.