用户注册窗口制作

效果：

 源码：

unit URegister;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Buttons,Data.Win.ADODB;

type
  TFRegister = class(TForm)
    lbl1: TLabel;
    lbl2: TLabel;
    edtAdmid2: TEdit;
    edtAdmps2: TEdit;
    btn1: TBitBtn;
    btn2: TBitBtn;
    procedure btn1Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  FRegister: TFRegister;

implementation

{$R *.dfm}

uses FDataPool, 日常管理助手;

procedure TFRegister.btn1Click(Sender: TObject);
var
Asql:string;
MyAdoq:TADOQuery;
begin
MyAdoq:=TADOQuery.Create(nil);
MyAdoq.Connection:= frmDataPool.ADOConnection1;
with MyAdoq do
begin
  Close;
  SQL.Clear;
  sql.Add('select * from 用户账号表 where admid = :admid');
  Parameters.ParamByName('admid').Value:= edtAdmid2.Text;//为admid参数赋值
  Open;
end;
if MyAdoq.isempty then
with MyAdoq do
begin
Close;
sql.Clear;
SQL.Text:= 'insert into 用户账号表(admid,admps) values ('''+edtAdmid2.Text+''','''+edtAdmps2.Text+''')';
ExecSQL; //插入一条注册账号记录
if MessageDlg('注册成功！是否关闭窗口?',mtConfirmation,[mbYes,mbno],0)=mrYes then
Self.Close;
end else
begin
FRegister.ModalResult:=0;
ShowMessage('该账号已存在，不能再注册');
Exit;
end;
MyAdoq.Free;
end;

procedure TFRegister.FormShow(Sender: TObject);
begin
edtAdmid2.Clear;//预清
edtAdmps2.Clear;//预清
end;

end.