c_czy.pas

《delphi数据库设计与实例开发》随书光盘

unit c_czy;

interface

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

type
  Tcfrm_czy = class(TForm)
    DBGrid1: TDBGrid;
    GroupBox1: TGroupBox;
    Label4: TLabel;
    e_id: TEdit;
    e_name: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    BitBtn3: TBitBtn;
    BitBtn4: TBitBtn;
    DataSource1: TDataSource;
    Image1: TImage;
    procedure FormCreate(Sender: TObject);
    procedure FormActivate(Sender: TObject);
    procedure DataSource1DataChange(Sender: TObject; Field: TField);
    procedure BitBtn4Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn3Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
    procedure DBGrid1Enter(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  cfrm_czy: Tcfrm_czy;
  mes:string;//提示文字

implementation

uses datam;

{$R *.dfm}

procedure Tcfrm_czy.FormCreate(Sender: TObject);
begin
  dm.ado_user.Open;
  dm.ADO_user.Sort:='编号';
  dm.ADO_user.First;
end;

procedure Tcfrm_czy.FormActivate(Sender: TObject);
begin
dbgrid1.SetFocus();
end;

procedure Tcfrm_czy.DataSource1DataChange(Sender: TObject; Field: TField);
begin
 e_id.Text:=dm.ADO_user.fieldbyname('编号').asstring;
 e_name.text:=dm.ADO_user.fieldbyname('操作员').asstring;
 if dm.ADO_user.fieldbyname('主管').AsBoolean=true then
    image1.Visible:=true
  else
    image1.Visible:=false;
end;

procedure Tcfrm_czy.BitBtn4Click(Sender: TObject);
begin
if dm.ADO_user.FieldByName('主管').AsBoolean=true then
    begin
     application.MessageBox(pchar('系统管理员，不可删除！')
      ,pchar('提示'),MB_ICONEXCLAMATION+mb_ok);
     exit;
    end;
 mes:='是否要删除操作员<'+dm.ADO_user.fieldbyname('操作员').AsString
       +'>';
 if application.MessageBox(pchar(mes),pchar('等待确认')
    ,+MB_ICONQUESTION+mb_okcancel)=idok then
    dm.ADO_user.Delete;
end;

procedure Tcfrm_czy.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  dm.ADO_user.close;
  release;
end;

procedure Tcfrm_czy.BitBtn1Click(Sender: TObject);
begin
  BitBtn3.Tag:=1;
  e_id.Enabled:=true;
  e_name.Enabled:=true;
  e_id.Text:='';
  e_name.text:='';
  Bitbtn1.enabled:=false;
  Bitbtn2.Enabled:=false;
  Bitbtn3.Enabled:=true;
  Bitbtn4.Enabled:=false;
  e_id.SetFocus();
end;

procedure Tcfrm_czy.BitBtn3Click(Sender: TObject);
var
 bh,xm:string;
begin
  bh:=e_id.Text;
  xm:=e_name.text;
  if Bitbtn3.Tag=1 then
    begin
     try
      dm.ADO_user.AppendRecord([bh,xm]);
     except
     e_id.SetFocus;
     e_id.text:='';
     e_name.Text:='';
     mes:='录入错误！'+#13+#13+'注意:<编号>、<姓名>均不能为空'
     +#13+'     且不可重复,请重新录入！';
     application.messagebox(pchar(mes),pchar('提示'),MB_ICONEXCLAMATION);
     exit;
     end;
     dm.ADO_user.Sort:='编号';
     e_id.text:='';
     e_name.Text:='';
     e_id.SetFocus();
    end
   else
    begin
    dm.ADO_user.Edit;
    dm.ADO_user.fieldbyname('编号').AsString:=bh;
    dm.ADO_user.fieldbyname('操作员').AsString:=xm;
    try
     dm.ADO_user.Post;
    except
     mes:='录入错误！'+#13+#13+'注意:<编号>、<姓名>均不能为空'
     +#13+'     且不可重复,请重新录入！';
     application.messagebox(pchar(mes),pchar('提示'),MB_ICONEXCLAMATION);
     dm.ADO_user.Cancel;
     exit;
    end;
   dm.ADO_user.Sort:='编号';
   end;
   Bitbtn3.Enabled:=false;
   Bitbtn1.Enabled:=true;
   Bitbtn2.Enabled:=true;
   Bitbtn4.Enabled:=true;

end;

procedure Tcfrm_czy.BitBtn2Click(Sender: TObject);
begin
  BitBtn3.Tag:=2;
  BitBtn3.Enabled:=true;
  e_id.Enabled:=true;
  e_name.Enabled:=true;
  BitBtn2.Enabled:=false;
  BitBtn1.Enabled:=false;
  Bitbtn4.Enabled:=false;
end;

procedure Tcfrm_czy.DBGrid1Enter(Sender: TObject);
begin
  BitBtn1.Enabled:=true;
  BitBtn2.Enabled:=true;
  BitBtn4.Enabled:=true;
  BitBtn3.Enabled:=false;
  e_id.Enabled:=false;
  e_name.enabled:=false;
  e_id.Text:=dm.ADO_user.fieldbyname('编号').asstring;
  e_name.text:=dm.ADO_user.fieldbyname('操作员').asstring;
  if dm.ADO_user.fieldbyname('主管').AsBoolean=true then
    image1.Visible:=true
  else
    image1.Visible:=false;
end;

end.