modifybook.~pas

蛮不错的图书管理系统,大家可以载着试试看啊

unit modifybook;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, DBCtrls, DB, DBTables, Mask, jpeg, ExtCtrls, Buttons;

type
  Tmodifyfrm = class(TForm)
    Panel1: TPanel;
    Image1: TImage;
    GroupBox1: TGroupBox;
    no: TLabel;
    c1: TComboBox;
    ty: TLabel;
    DBEdit1: TDBEdit;
    Label1: TLabel;
    Label2: TLabel;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    Label3: TLabel;
    DBEdit4: TDBEdit;
    Label4: TLabel;
    Label5: TLabel;
    DBEdit5: TDBEdit;
    Label6: TLabel;
    DBEdit6: TDBEdit;
    Label7: TLabel;
    DBEdit7: TDBEdit;
    Label8: TLabel;
    DBEdit8: TDBEdit;
    DBEdit9: TDBEdit;
    Label9: TLabel;
    t1: TTable;
    DataSource1: TDataSource;
    DBMemo1: TDBMemo;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    procedure c1Change(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  modifyfrm: Tmodifyfrm;

implementation

{$R *.dfm}

procedure Tmodifyfrm.c1Change(Sender: TObject);
begin
 with t1 do
  begin
   setkey;
   fieldbyname('图书编号').AsString:=c1.Items[c1.ItemIndex];
    //fieldbyname('图书编号').AsString:=edit1.Text;
   gotokey;
  end;
end;

procedure Tmodifyfrm.FormShow(Sender: TObject);

begin
t1.Open;
c1.Items.Clear;
while not t1.Eof do
 begin

   c1.Items.Add(t1.fieldbyname('图书编号').AsString);
   t1.Next;
 end;
t1.First;
c1.ItemIndex:=0;
end;


procedure Tmodifyfrm.FormClose(Sender: TObject; var Action: TCloseAction);
begin
t1.Close;
end;

procedure Tmodifyfrm.BitBtn1Click(Sender: TObject);
begin
close;
end;

procedure Tmodifyfrm.BitBtn2Click(Sender: TObject);
begin
 if  messagedlg ('确定修改吗？',mtinformation,[mbYes,mbNo],0)=mrNo then exit;
   c1.ItemIndex:=c1.ItemIndex+1;
   c1.ItemIndex:=c1.ItemIndex-1; 
end;

end.