[C#/UWP] PasswordBox 엘리먼트 : PasswordChanged 이벤트 사용하기

■ PasswordBox 엘리먼트의 PasswordChanged 이벤트를 사용하는 방법을 보여준다.

TestProject.zip

0.02MB

▶ MainPage.xaml

<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <StackPanel
            HorizontalAlignment="Center"
            VerticalAlignment="Center">
            <PasswordBox
                Width="300"
                PasswordChanged="passwordBox_PasswordChanged" />
            <TextBlock Name="textBlock"
                Margin="0 10 0 0"
                Visibility="Collapsed" />
        </StackPanel>
    </Grid>
</Page>

 

▶ MainPage.xaml.cs

using Windows.Foundation;
using Windows.Graphics.Display;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace TestProject
{
    /// <summary>
    /// 메인 페이지
    /// </summary>
    public sealed partial class MainPage : Page
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainPage()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainPage()
        {
            InitializeComponent();

            #region 윈도우 크기를 설정한다.

            double width  = 800d;
            double height = 600d;

            double dpi = (double)DisplayInformation.GetForCurrentView().LogicalDpi;

            ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.PreferredLaunchViewSize;

            Size windowSize = new Size(width * 96d / dpi, height * 96d / dpi);

            ApplicationView.PreferredLaunchViewSize = windowSize;

            Window.Current.Activate();

            ApplicationView.GetForCurrentView().TryResizeView(windowSize);

            #endregion
            #region 윈도우 제목을 설정한다.

            ApplicationView.GetForCurrentView().Title = "PasswordBox 엘리먼트 : PasswordChanged 이벤트 사용하기";

            #endregion
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 패스워드 박스 패스워드 변경시 처리하기 - passwordBox_PasswordChanged(sender, e)

        /// <summary>
        /// 패스워드 박스 패스워드 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void passwordBox_PasswordChanged(object sender, RoutedEventArgs e)
        {
            if(sender is PasswordBox passwordBox)
            {
                if(string.IsNullOrEmpty(passwordBox.Password) || passwordBox.Password.ToLower() == "password")
                {
                    this.textBlock.Visibility = Visibility.Visible;
                    this.textBlock.Text       = "'password'는 허용되지 않습니다.";

                    passwordBox.Password = string.Empty;
                }
                else
                {
                    this.textBlock.Text       = string.Empty;
                    this.textBlock.Visibility = Visibility.Collapsed;
                }
            }
        }

        #endregion
    }
}