CheckBox 컨트롤

[MainPage.xaml]

<UserControl x:Class="RiaCheckBox.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d"

    d:DesignHeight="300" d:DesignWidth="400">

 

    <Grid x:Name="LayoutRoot" Background="White">

        <StackPanel>

            <StackPanel x:Name="my">

                <TextBlock Text="당신의 관심사항은?"></TextBlock>

                <CheckBox Content="C#" IsThreeState="False"></CheckBox>

                <CheckBox Content="ASP.NET" IsChecked=""></CheckBox>

                <CheckBox Content="Silverlight" IsChecked="True"></CheckBox>

            </StackPanel>

            <TextBlock><LineBreak></LineBreak></TextBlock>

            <CheckBox x:Name="chkShow" IsThreeState="False" Content="보이기" />

        </StackPanel>

    </Grid>

</UserControl>

 





[MainPage.xaml.cs]

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

 

namespace RiaCheckBox

{

    public partial class MainPage : UserControl

    {

        public MainPage()

        {

            InitializeComponent();

 

            this.chkShow.Click += new RoutedEventHandler(chkShow_Click);

        }

 

        void chkShow_Click(object sender, RoutedEventArgs e)

        {           

            // 클릭한 개체가 체크박스인지 확인

            CheckBox c = new CheckBox();

            if (sender is CheckBox) // is 연산자 : ~개체이냐? true/false

            {

                c = sender as CheckBox; // 체크박스이면 해당 개체를 담고, 그렇지 않으면 null값을 담는다.   

            }           

            if (c == null) return;

            bool chk = c.IsChecked ?? false; // null이 아니면(true이면) true, 그렇지 않으면 기본값인 false를 지정해주는 '??연산자'

            // my 개체에 대해서 보임/숨김

            my.Visibility = chk ? Visibility.Visible : Visibility.Collapsed; // 3항연산자

        }

    }

}