async private void Register_OnClick(object sender, RoutedEventArgs e)
        {
            if (string.IsNullOrEmpty(txtName.Text) || string.IsNullOrEmpty(txtPwd.Password))
            {
                await new MessageDialog("用户名、密码不能为空").ShowAsync();
                return;
            }

            var repository = new RepositoryAsync();

            var deviceId = Guid.NewGuid().ToString();

            var api = new MemberService();
            var result = await api.Register(txtName.Text, txtPwd.Password, deviceId);
            if (result.Success)
            {
                await repository.InsertUserAsync(new User() { NickName = txtName.Text, Account = txtName.Text, DeviceId = deviceId });

                await new MessageDialog("注册成功").ShowAsync();
            }
            else
            {
                await new MessageDialog(result.Msg).ShowAsync();
            }
        }
        private async void RegisterAll_OnClick(object sender, RoutedEventArgs e)
        {
            this.progressRing.IsActive = true;
            var repository = new RepositoryAsync();

            var api = new MemberService();
            int count = 0;
            var userNames = FileHelper.GetUserNameWithNickName();
            foreach (var item in userNames)
            {
                var deviceId = Guid.NewGuid().ToString();
                var result = await api.Register(item["username"], "123456", deviceId);
                if (result.Success)
                {
                    await repository.InsertUserAsync(new User() { NickName = item["nickname"], Account = item["username"], DeviceId = deviceId });

                    count = count + 1;
                }
            }

            this.progressRing.IsActive = false;
            await new MessageDialog($"总共注册用户数:{count}").ShowAsync();
        }