unit15.~pas

一个可以用于书店的图书信息管理系统

unit Unit15;

interface

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

type
  TForm15 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    ADOQuery1: TADOQuery;
    DataSource1: TDataSource;
    Button4: TButton;
    DBGrid1: TDBGrid;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Edit3: TEdit;
    Button5: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form15: TForm15;

implementation

uses Unit2;

{$R *.dfm}

procedure TForm15.Button1Click(Sender: TObject);
Var
 s:string;
begin
adoquery1.Close;
adoquery1.sql.clear;
s:='select * from  用户管理 where 1=1';
if edit1.Text<>'' then
s:=s+'and 等级='''+edit1.text+'''';
if edit2.Text<>'' then
s:=s+'and 用户名='''+edit2.text+'''';
//if length(edit1.text)=0
//then
//begin
//if  length(edit2.text)=0 then
//begin
//application.MessageBox('请至少输入一个查询条件！','图书管理系统-提示信息',mb_ok);
//form15.show;
//end
//else
adoquery1.sql.add(s);
adoquery1.open;
if adoquery1.recordcount=0 then
 application.MessageBox('没有该用户！','图书信息管理-提示！',mb_ok);
end;

procedure TForm15.Button3Click(Sender: TObject);
begin
adoquery1.Post;
showmessage('新信息修改成功！');
end;

procedure TForm15.Button4Click(Sender: TObject);
begin
form15.Close;
form2.show;
end;

procedure TForm15.FormCreate(Sender: TObject);
begin
adoquery1.close;
end;

procedure TForm15.Button2Click(Sender: TObject);
begin
 if messagebox(0,'确实要删除该图书信息吗？','图书管理系统-提示信息',mb_okcancel+mb_iconquestion+mb_defbutton3)=idok then
adoquery1.Delete;

end;

procedure TForm15.Button5Click(Sender: TObject);
begin
adoquery1.Close;
adoquery1.SQL.clear;
adoquery1.SQL.Add('insert into 用户管理 values('''+edit1.text+''','''+edit2.Text+''','''+edit3.text+''')');
adoquery1.ExecSQL;
application.messagebox('新用户增加成功！','图书信息管理',mb_ok);
end;

end.