deletemember.pas

餐饮管理源代码 使用BDE Administrator在本地机器上添加一个Paradox数据库别名命名为WorkData

unit deleteMember;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls, StdCtrls,IdGlobal;

type
  TfrmDeleteMember = class(TForm)
    GroupBox1: TGroupBox;
    Label12: TLabel;
    memberId: TEdit;
    Button3: TButton;
    GroupBox2: TGroupBox;
    Label1: TLabel;
    Label11: TLabel;
    Label2: TLabel;
    Label15: TLabel;
    Label5: TLabel;
    Label3: TLabel;
    Label9: TLabel;
    Label4: TLabel;
    Label7: TLabel;
    memberName: TEdit;
    gender: TComboBox;
    folk: TEdit;
    profession: TComboBox;
    eduLevel: TComboBox;
    address: TEdit;
    telephone: TEdit;
    birthDay: TDateTimePicker;
    joinTime: TDateTimePicker;
    Button1: TButton;
    Button2: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button3Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure memberIdChange(Sender: TObject);
  private
    { Private declarations } 
    function isInteger(s:string):boolean;
  public
    { Public declarations }
  end;

var
  frmDeleteMember: TfrmDeleteMember;

implementation

uses dataModule;

{$R *.dfm}

procedure TfrmDeleteMember.FormCreate(Sender: TObject);
begin
   {初始化生日和入会时间}
   birthDay.Date:=now;
   joinTime.Date:=now;
   {没验证会员编号前不可删除}
   button1.Enabled:=false;
end;

procedure TfrmDeleteMember.Button2Click(Sender: TObject);
begin
   dm.tblMember.Close;
end;

procedure TfrmDeleteMember.FormClose(Sender: TObject;
  var Action: TCloseAction);
begin
   dm.tblMember.Close;
end;

procedure TfrmDeleteMember.Button3Click(Sender: TObject);
var
   flag:boolean;
   i:integer;
begin
   {验证会员编号的合法性}
   if isInteger(memberId.Text)=false then
   begin
      messageDlg('输入编号不合法',mtWarning,[mbOk],0);
      activeControl:=memberId;
      exit;
   end;
   {验证会员编号的存在性}
   flag:=false;
   with dm.tblMember do
   begin
      open;
      first;
      while not eof do
      begin
         if fieldByName('会员编号').AsString=memberId.Text then
         begin
            flag:=true;
            break;
         end;
         next;
      end;
      if flag=false then//会员不存在
      begin
         messageDlg('输入编号不存在',mtWarning,[mbOk],0);
         button1.Enabled:=false;
         exit;
      end;
   end;
   button1.Enabled:=true;
   {显示此会员的信息}
   with dm.tblMember do
   begin
      memberName.Text:=fieldByName('会员姓名').asString;
      i:=gender.Items.IndexOf(fieldByName('性别').asString);
      gender.ItemIndex:=i;
      folk.Text:=fieldByName('民族').asString;
      i:=eduLevel.Items.IndexOf(fieldByName('学历').asString);
      eduLevel.ItemIndex:=i;
      birthDay.Date:=fieldByName('生日').AsDateTime;
      joinTime.Date:=fieldByName('入会时间').AsDateTime;
      i:=profession.Items.IndexOf(fieldByName('职业').asString);
      profession.ItemIndex:=i;
      telephone.Text:=fieldByName('电话').asString;
      address.Text:=fieldByName('地址').asString;
   end;
end;
function TfrmDeleteMember.isInteger(s: string): boolean;
var
   i:integer;
begin
   i:=1;
   if length(s)=0 then
   begin
      result:=false;
      exit;
   end;
   while i<=length(s) do
   begin
      if (isNumeric(s[i])=false) then
      begin
         result:=false;
         exit;
      end;
      i:=i+1;
   end;
   result:=true;
end;
procedure TfrmDeleteMember.Button1Click(Sender: TObject);
var
   i:integer;
   id:integer;
begin
   i:=messageDlg('确定要删除会员记录?',mtWarning,[mbYes,mbNo],0);
   if i=6 then
   begin
      {记录要删除记录的关键字}
      id:=strtoint(memberId.Text);
      {删除这一条记录}
      dm.tblMember.Delete;
      {清屏并且删除按钮不可用}
      memberId.Text:='';
      memberName.Text:='';
      gender.ItemIndex:=0;
      folk.Text:='';
      eduLevel.ItemIndex:=0;
      birthDay.Date:=now;
      joinTime.Date:=now;
      profession.ItemIndex:=0;
      telephone.Text:='';
      address.Text:='';
      activeControl:=memberId;

   end;
end;

procedure TfrmDeleteMember.memberIdChange(Sender: TObject);
begin
   button1.Enabled:=false;
end;

end.