protected void ButtonOK_Click(object sender, EventArgs e)
        {
            bool done = false;
            StringBuilder stringBuilder = new StringBuilder();

            UserBusiness business = new UserBusiness();

            if (this.CheckBoxListUsers.Items != null)
            {
                List<User> users = new List<User>();
                for (int i = 0; i < this.CheckBoxListUsers.Items.Count; i++)
                {
                    if (this.CheckBoxListUsers.Items[i].Selected)
                    {
                        User user = new User();
                        user.Guid = this.CheckBoxListUsers.Items[i].Value;
                        users.Add(user);
                    }
                }

                if ((users != null) && (users.Count > 0))
                {
                    int success = 0;
                    int fail = 0;
                    for (int i = 0; i < users.Count; i++)
                    {
                        done = business.Delete(users[i]);
                        if (done)
                        {
                            success++;
                        }
                        else
                        {
                            fail++;
                        }
                    }
                    stringBuilder.Append(string.Format("删除{0}个用户成功!", success));
                    stringBuilder.Append(string.Format("删除{0}个用户失败!", fail));
                }
            }

            this.LabelMessage.Text = stringBuilder.ToString();

            this.InitializeBind();
        }