c_roomedit.pas

《delphi数据库设计与实例开发》随书光盘

unit c_roomedit;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, ComCtrls, ExtCtrls, ImgList, ToolWin, StdCtrls,
  DBCtrls, Mask, DB;

type
  Tcfrm_roomedit = class(TForm)
    ToolBar1: TToolBar;
    TButton1: TToolButton;
    TButton2: TToolButton;
    TButton3: TToolButton;
    ToolButton4: TToolButton;
    TButton5: TToolButton;
    TButton6: TToolButton;
    ToolButton7: TToolButton;
    TButton8: TToolButton;
    ImageList1: TImageList;
    Panel1: TPanel;
    Panel2: TPanel;
    DBGrid1: TDBGrid;
    Label1: TLabel;
    StatusBar1: TStatusBar;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    DataSource1: TDataSource;
    DBEdit1: TDBEdit;
    DBNavigator1: TDBNavigator;
    DBEdit3: TDBEdit;
    DBEdit2: TDBEdit;
    DBComboBox1: TDBComboBox;
    DBComboBox2: TDBComboBox;
    procedure TButton1Click(Sender: TObject);
    procedure TButton2Click(Sender: TObject);
    procedure TButton5Click(Sender: TObject);
    procedure TButton6Click(Sender: TObject);
    procedure TButton3Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure DBEdit1KeyPress(Sender: TObject; var Key: Char);
    procedure DBCombobox1Change(Sender: TObject);
  private
    { Private declarations }
  public
    procedure kfsl;
    { Public declarations }
  end;

var
  cfrm_roomedit: Tcfrm_roomedit;
  roomcount:integer;

implementation

uses c_datam, publicvar;

{$R *.dfm}



procedure tcfrm_roomedit.kfsl;
begin
  roomcount:=dm.ADO_room.RecordCount;
  StatusBar1.Panels[0].text:='当前的客房总数为：'+inttostr(roomcount);
end;

procedure Tcfrm_roomedit.TButton1Click(Sender: TObject);
begin
  dm.ADO_room.Append;
  TButton5.Tag:=0;
  TButton1.Enabled:=false;
  TButton2.Enabled:=false;
  TButton3.Enabled:=false;
  TButton5.Enabled:=true;
  TButton6.Enabled:=true;
  DBCombobox1.Text:='';
  dbedit2.Text:='';
  DBCombobox2.Text:='';
  DBCombobox1.Enabled:=true;
  DBCombobox2.Enabled:=true;
  DBEdit1.Enabled:=true;
  DBEdit3.Enabled:=true;
  dbedit2.Enabled:=true;

end;

procedure Tcfrm_roomedit.TButton2Click(Sender: TObject);
var mes:string;
begin
  if dm.ADO_room.FieldByName('Room_state').AsString='满' then
  begin
      mes:='房间： <'+dm.ADO_room.fieldbyname('Room_id').AsString
           +'> 已有住客，不能修改！';
      application.MessageBox(pchar(mes),pchar('提示')
       ,+MB_ICONQUESTION);
      exit;
  end
  else
  TButton5.Tag:=1;
  TButton1.Enabled:=false;
  TButton2.Enabled:=false;
  TButton3.Enabled:=false;
  TButton5.Enabled:=true;
  TButton6.Enabled:=true;
  DBCombobox1.Enabled:=true;
  DBCombobox2.Enabled:=true;
  DBEdit1.Enabled:=true;
  DBEdit3.Enabled:=true;
  dbedit2.Enabled:=true;

end;


procedure Tcfrm_roomedit.TButton5Click(Sender: TObject);
begin
if Length(DBEdit1.Text)<3 then  //判断输入的房间号是否合法
    begin
      Application.MessageBox(PChar('房间编号不能为空或小于3位,请重新录入！')
      , PChar('提示'),MB_ICONEXCLAMATION);
      DBEdit1.SetFocus();
      exit;
     end;
  if DBCombobox1.Text='' then  //判断是否输入了类型
    begin
      Application.MessageBox(PChar('类型不能为空,请重新录入！')
      , PChar('提示'),MB_ICONEXCLAMATION);
      DBCombobox1.SetFocus();
      exit;
     end;
  if DBCombobox2.Text='' then  //判断是否输入了状态
    begin
      Application.MessageBox(PChar('客房状态不能为空,请重新录入！')
      , PChar('提示'),MB_ICONEXCLAMATION);
      DBCombobox2.SetFocus();
      exit;
     end;
  if TButton5.Tag=1 then dm.ADO_room.Edit;
  try
   dm.ADO_room.Post;
  except
    Application.MessageBox(PChar('房间号重复,请重新录入！'), PChar('提示'),
      MB_ICONEXCLAMATION);
    DBEdit1.SetFocus();
    exit;
  end;
  TButton1.Enabled:=true;
  TButton2.Enabled:=true;
  TButton3.Enabled:=true;
  TButton5.Enabled:=false;
  TButton6.Enabled:=false;
  DBCombobox1.Enabled:=false;
  DBCombobox2.Enabled:=false;
  DBEdit1.Enabled:=false;
  DBEdit3.Enabled:=false;
  dbedit2.Enabled:=false;
  kfsl;
end;

procedure Tcfrm_roomedit.TButton6Click(Sender: TObject);
begin
 dm.ADO_room.Cancel;
 TButton1.Enabled:=true;
  TButton2.Enabled:=true;
  TButton3.Enabled:=true;
  TButton5.Enabled:=false;
  TButton6.Enabled:=false;
  DBCombobox1.Enabled:=false;
  DBCombobox2.Enabled:=false;
  DBEdit1.Enabled:=false;
  DBEdit3.Enabled:=false;
  dbedit2.Enabled:=false;
end;

procedure Tcfrm_roomedit.TButton3Click(Sender: TObject);
var mes:string;
begin
if dm.ADO_room.FieldByName('Room_state').AsString='满' then
  begin
      mes:='房间： <'+dm.ADO_room.fieldbyname('Room_id').AsString
           +'> 已有住客，不能删除！';
      application.MessageBox(pchar(mes),pchar('提示')
       ,+MB_ICONQUESTION);
      exit;
  end;
  mes:='是否要删除房间< '+dm.ADO_room.fieldbyname('Room_id').AsString +'>';
 if application.MessageBox(pchar(mes),pchar('等待确认')
    ,+MB_ICONQUESTION+mb_okcancel+MB_DEFBUTTON2)=idok then
     begin
      dm.ADO_room.Delete;//删除房间记录
      kfsl;
     end;

end;

procedure Tcfrm_roomedit.FormCreate(Sender: TObject);
begin
StatusBar1.Panels[1].Text:=datetostr(date())+'|'+username;
dm.ADO_room.Open;
  dm.ADO_room.Sort:='Room_id';
  dm.ADO_room.First;
  dm.ado_roomtype.open;
  dm.ADO_roomtype.Sort:='Num';
  while not dm.ado_roomtype.Eof do
    begin
     DBCombobox1.items.add(dm.ADO_roomtype.fieldbyname('type').AsString);
     dm.ADO_roomtype.Next;
    end;
    dm.ado_roomtype.close;
  kfsl;
end;

procedure Tcfrm_roomedit.DBEdit1KeyPress(Sender: TObject; var Key: Char);
begin
 if not ( Key in ['0'..'9',#13,#8]) then Key := #0;
end;

procedure Tcfrm_roomedit.DBCombobox1Change(Sender: TObject);
begin
  dm.ado_roomtype.open;
  dm.ADO_roomtype.Sort:='Num';
  if dm.ADO_roomtype.Locate('type',DBCombobox1.Text,[]) then
  DBedit2.Text:=dm.ADO_roomtype.fieldbyname('price').AsString;
  dm.ado_roomtype.close;
end;

end.