unit12.~pas

能够动态的实现数据库表的创建

unit unit12;

interface

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

type
  TForm12 = class(TForm)
    Panel1: TPanel;
    Edit3: TEdit;
    Edit4: TEdit;
    ADOQuery1: TADOQuery;
    Edit1: TEdit;
    Image1: TImage;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form12: TForm12;

implementation

{$R *.dfm}

procedure TForm12.BitBtn1Click(Sender: TObject);
begin
  if(edit1.Text='')or(edit3.Text='')or(edit4.Text='')then
  begin
   application.MessageBox('请输入完整的信息','提示',mb_ok);
   exit;
   end;
   ADOquery1.close;
   ADOquery1.sql.clear;
   ADOquery1.sql.add('select * from 登陆 where 用户名='''+edit1.text+'''');
   ADOquery1.open;
   if ADOquery1.recordcount>0 then
   begin
     if(edit3.Text)<>(edit4.Text)then
     begin
      showmessage('两次输入的密码不一致');
      exit;
     end;
      ADOquery1.Edit;
      ADOquery1.fieldvalues['用户名']:=edit1.Text;
      ADOquery1.fieldvalues['密码']:=edit3.Text;
      ADOquery1.post;
      showmessage('修改成功');
      exit;
       self.Close;

   end;
     showmessage('您输入的用户名不存在');
     exit;
end;

procedure TForm12.BitBtn2Click(Sender: TObject);
begin
  close;
end;

end.