/// <summary>
        /// 注册
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        /// 注意,注册和每次更新用户数据应该存储用户Token,PhoneNumber,EmailAddress
        private async void btnRegister_Click(object sender, RoutedEventArgs e)
        {
            if (txtAccount_reg.Text.Length <= 0 || txtEmail_reg.Text.Length <= 0 ||
                txtPhone_reg.Text.Length <= 0 || txtPhone_reg.Text.Length <= 0)
            {
                await new MessageBox("缺少必填字段", MessageBox.NotifyType.CommonMessage).ShowAsync();
                return;
            }
            UserAccountHelper.RegisterStatus status = await UserAccountHelper.Register(txtAccount_reg.Text, txtEmail_reg.Text,
                                                                                       txtPhone_reg.Text, txtPassword_reg.Password);

            if (status == UserAccountHelper.RegisterStatus.Success)
            {
                await new MessageBox("注册成功!", MessageBox.NotifyType.CommonMessage).ShowAsync();
            }
            else if (status == UserAccountHelper.RegisterStatus.ConflictUserName)
            {
                await new MessageBox("已存在的用户名,更换用户名重试!", MessageBox.NotifyType.CommonMessage).ShowAsync();
            }
            else if (status == UserAccountHelper.RegisterStatus.Failed)
            {
                await new MessageBox("注册失败!", MessageBox.NotifyType.CommonMessage).ShowAsync();
            }
        }