[WPF] ListBox와 LINQ쿼리

💻 Duty 클래스 (View Model에 해당)

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HelloWorld1
{
    public enum DutyType // 열거형
    {
        Inner,
        OutSide
    }
    public class Duty
    {
        private string _name; // 직무명
        private DutyType _dutyType; // 직무타입(내근, 외근)

        public Duty() { } // 생성자
        public Duty(string name, DutyType dutyType)
        {
            _name = name;
            _dutyType = dutyType;
        }

        // 프로퍼티
        public string DutyName 
        { 
            get { return _name; }
            set
            {
                _name= value;
            }
        }

        public DutyType DutyType
        {
            get { return _dutyType; }   
            set
            {
                _dutyType = value;
            }
        }
    }

    public class Duties : ObservableCollection<Duty>
    {
        public Duties() 
        {
            Add(new Duty("SALES", DutyType.OutSide));
            Add(new Duty("LOGISTICS", DutyType.OutSide));
            Add(new Duty("IT", DutyType.Inner));
            Add(new Duty("MARKETING", DutyType.Inner));
            Add(new Duty("HR", DutyType.Inner));
            Add(new Duty("PROPOTION", DutyType.OutSide));
        }

    }
}

💻 MainWindow.xaml

<Window x:Class="HelloWorld1.MainWindow"
        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"
        xmlns:local="clr-namespace:HelloWorld1"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <!--Duty파일에서 만든 Duties 클래스를 resource로 등록-->
        <local:Duties x:Key="duties"/>
        <DataTemplate x:Key="MyTemplate">
            <Border x:Name="border">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition/>
                        <RowDefinition/>
                        <RowDefinition/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition/>
                        <ColumnDefinition/>
                    </Grid.ColumnDefinitions>
                    <TextBlock Grid.Row="0" Grid.Column="0" Text="Duty Name"/>
                    <TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding Path=DutyName}"/>
                    <TextBlock Grid.Row="1" Grid.Column="0" Text="Duty Type"/>
                    <TextBlock Grid.Row="1" Grid.Column="1" Text="{Binding Path=DutyType}"/>
                    <Separator Grid.Row="2" Grid.ColumnSpan="2"/>
                </Grid>
            </Border>
        </DataTemplate>
        <LinearGradientBrush x:Key="GrayBlueGradienBrush" StartPoint="0,0" EndPoint="1,1">
            <GradientStop Color="DarkGray" Offset="0"/>
            <GradientStop Color="#CCCCFF" Offset="0.5"/>
            <GradientStop Color="DarkGray" Offset="1"/>
        </LinearGradientBrush>
        <Style TargetType="{x:Type Button}">
            <Setter Property="Background" Value="{StaticResource GrayBlueGradienBrush}"/>
            <Setter Property="Width" Value="80"/>
            <Setter Property="Margin" Value="10"/>
        </Style>
    </Window.Resources>
    
    <!--실제 UI-->
    <StackPanel>
        <Button x:Name="Add" Click="OpenNewWindow">직무 추가</Button>
        <TextBlock Margin="10,0,0,0">직무타입을 선택 하세요.</TextBlock>
        <ListBox Name="myListBox1"
                 SelectionChanged="OnSelected"
                 SelectedIndex="0"
                 Margin="10,0,10,0">
            <ListBoxItem>Inner</ListBoxItem>
            <ListBoxItem>OutSide</ListBoxItem>
        </ListBox>
        <TextBlock Margin="10,10,0,-10">직무</TextBlock>
        <ListBox Width="400" Margin="10" Name="myListBox2"
                 HorizontalContentAlignment="Stretch"
                 ItemsSource="{Binding}"
                 ItemTemplate="{StaticResource MyTemplate}"
                 SelectionChanged="OnSelected2"/>
    </StackPanel>
</Window>

💻 MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace HelloWorld1
{
    public partial class MainWindow : Window
    {
        internal static Duties duties = new Duties();
        public MainWindow()
        {
            InitializeComponent();
        }

        private void OnSelected(object sender, SelectionChangedEventArgs e)
        {
            if((sender as ListBox).SelectedItem != null)
            {
                string dutyType = ((sender as ListBox).SelectedItem as ListBoxItem).Content.ToString();
                DataContext = from duty in duties
                              where duty.DutyType.ToString() == dutyType
                              select duty;
                // dutyType이 일치하는 dutyfmf duties에서 하나씩 꺼내서 select 한다 
            }
        }

        private void OnSelected2(object sender, SelectionChangedEventArgs e)
        {
            var duty = (Duty)myListBox2.SelectedItem;
            //string value = duty == null ? "No Selection" : duty.ToString();

            MessageBox.Show(duty.DutyName + "::" + duty.DutyType, "선택한 직무");
        }

        // 직무 추가 버튼을 클릭 했을 때 새 창을 띄움 
        private void OpenNewWindow(object sender, RoutedEventArgs e)
        {
            SubWindow subWindow = new SubWindow();

            RefreshListEvent += new RefreshList(RefreshListBox);
            subWindow.UpdateActor = RefreshListEvent;
            subWindow.Show();
        }

        // 아래쪽 ListABox를 Refresh 하기 위한 델리게이트 및 이벤트 
        public delegate void RefreshList(DutyType dutyType);
        public event RefreshList RefreshListEvent;

        // RefreshListEvent 이벤트가 발생했을 때 호출되는 메서드 
        private void RefreshListBox(DutyType dutyType)
        {
            // 내근은 SelectedIndex를 0, 외근은 SelectedIndex를 1로 설정하여 
            // 상단 ListBox의 선택값을 변경 시킨다. 
            // 상단 ListBox의 값이 바뀜에 따라 OnSAelected 이벤트 핸들러가 호출되어 
            // 자동으로 아래쪽 ListBox의 값은 변경된다 
            myListBox1.SelectedItem = null;
            myListBox2.SelectedIndex = (dutyType == DutyType.Inner ? 0 : 1);    
        }
    }
}

💻 SubWindow.xaml

<Window x:Class="HelloWorld1.SubWindow"
        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"
        xmlns:local="clr-namespace:HelloWorld1"
        mc:Ignorable="d"
        Title="SubWindow" Height="300" Width="300">
    <Grid Margin="10">
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="40"/>
            <RowDefinition Height="40"/>
            <RowDefinition Height="40"/>
        </Grid.RowDefinitions>
        <TextBlock FontSize="20" Grid.ColumnSpan="3" HorizontalAlignment="Center" VerticalAlignment="Center">직무 등록</TextBlock>
        <TextBlock Grid.Row="1"  Margin="10" VerticalAlignment="Center">직무명</TextBlock>
        <TextBox x:Name="txtDutyName" Grid.Row="1" Margin="10" Grid.Column="1" Grid.ColumnSpan="2" VerticalAlignment="Center"/>
        <TextBlock Margin="10" Grid.Row="2" VerticalAlignment="Center">직무타입</TextBlock>
        <RadioButton x:Name="rdoInner" Grid.Row="2" Grid.Column="1" HorizontalAlignment="Center"  VerticalAlignment="Center">내근</RadioButton>
        <RadioButton x:Name="rdoOutside" Grid.Row="2" Grid.Column="2" HorizontalAlignment="Center" VerticalAlignment="Center">외근</RadioButton>
        <Button Grid.Column="1" Grid.Row="2" Width="100" HorizontalAlignment="Center" Click="Button_Click" Height="22" Margin="0,52,0,-34">저장</Button>
    </Grid>
</Window>

 

💻 SubWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace HelloWorld1
{
    public partial class SubWindow : Window

    {

        // 메인 윈도우의 하단 ListBox를 Refresh하기 위한 델리게이트
        // 메인 윈도우에서 직무추가 버튼을 클릭할 때 이벤트를 할당해 준다.

        public Delegate UpdateActor;

        public SubWindow()
        {
            InitializeComponent();
        }

        // 저장 버튼 클릭
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (rdoInner.IsChecked == false && rdoOutside.IsChecked == false)
            {
                MessageBox.Show("내근 또는 외근을 선택하세요.", "항목선택");
                return;
            }

            DutyType dutyType = (rdoInner.IsChecked == true) ? DutyType.Inner : DutyType.OutSide;
            MainWindow.duties.Add(new Duty(txtDutyName.Text, dutyType));

            // 델리게이트 호출
            UpdateActor.DynamicInvoke(dutyType);
            MessageBox.Show("저장OK!", "저장확인");

            this.Close();
        }
    }
}