■ InvokeCommandAction 클래스를 사용해 이벤트에 반응해 명령을 호출하는 방법을 보여준다.
▶ MainWindow.xaml
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<Window x:Class="TestProject.Views.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:prism="http://prismlibrary.com/" prism:ViewModelLocator.AutoWireViewModel="True" Width="800" Height="600" Title="{Binding Title}" FontFamily="나눔고딕코딩" FontSize="16"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="*" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <StackPanel Grid.Row="0"> <TextBlock Margin="5" FontSize="24" Foreground="DarkRed" TextWrapping="Wrap" Text="InvokeCommandAction" /> <TextBlock Margin="5" TextWrapping="Wrap"> The <Bold>InvokeCommandAction</Bold> is useful when you need to invoke a command in response to an event raised by a control in the view. </TextBlock> <TextBlock Margin="5" TextWrapping="Wrap"> In the following example there is a list of items and we want to execute a command in the view model when an item is selected. The view model will then change the "Selected Item" shown below. </TextBlock> </StackPanel> <ListBox Grid.Row="1" Margin="5" SelectionMode="Single" ItemsSource="{Binding Items}"> <i:Interaction.Triggers> <i:EventTrigger EventName="SelectionChanged"> <prism:InvokeCommandAction Command="{Binding SelectCommand}" TriggerParameterPath="AddedItems" /> </i:EventTrigger> </i:Interaction.Triggers> </ListBox> <StackPanel Grid.Row="2" Margin="5" Orientation="Horizontal"> <TextBlock Foreground="DarkRed" FontWeight="Bold" Text="Selected Item" /> <TextBlock Margin="5, 0" AutomationProperties.AutomationId="SelectedItemTextBlock" Foreground="DarkRed" FontWeight="Bold" Text="{Binding SelectedItemText}" /> </StackPanel> </Grid> </Window> |
▶ MainWindow.xaml.cs
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using System.Windows; namespace TestProject.Views { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); } #endregion } } |
▶ MainWindowViewModel.cs
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using System.Collections.Generic; using System.Linq; using Prism.Commands; using Prism.Mvvm; namespace TestProject.ViewModels { /// <summary> /// 메인 윈도우 뷰 /// </summary> public class MainWindowViewModel : BindableBase { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 제목 /// </summary> private string title = "InvokeCommandAction 클래스 : 이벤트에 반응해 명령 호출하기"; /// <summary> /// 선택 항목 텍스트 /// </summary> private string selectedItemText; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 제목 - Title /// <summary> /// 제목 /// </summary> public string Title { get { return this.title; } set { SetProperty(ref this.title, value); } } #endregion #region 선택 항목 텍스트 - SelectedItemText /// <summary> /// 선택 항목 텍스트 /// </summary> public string SelectedItemText { get { return this.selectedItemText; } private set { SetProperty(ref this.selectedItemText, value); } } #endregion #region 항목 리스트 - Items /// <summary> /// 항목 리스트 /// </summary> public IList<string> Items { get; private set; } #endregion #region 선택 명령 - SelectCommand /// <summary> /// 선택 명령 /// </summary> public DelegateCommand<object[]> SelectCommand { get; private set; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindowViewModel() /// <summary> /// 생성자 /// </summary> public MainWindowViewModel() { Items = new List<string>(); Items.Add("Item1"); Items.Add("Item2"); Items.Add("Item3"); Items.Add("Item4"); Items.Add("Item5"); SelectCommand = new DelegateCommand<object[]>(Select); } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 선택하기 - Select(selectedItemArray) /// <summary> /// 선택하기 /// </summary> /// <param name="selectedItemArray">선택 항목 배열</param> private void Select(object[] selectedItemArray) { if(selectedItemArray != null && selectedItemArray.Count() > 0) { SelectedItemText = selectedItemArray.FirstOrDefault().ToString(); } } #endregion } } |
▶ MainApplication.xaml
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<prism:PrismApplication x:Class="TestProject.MainApplication" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:prism="http://prismlibrary.com/"> </prism:PrismApplication> |
▶ MainApplication.xaml.cs
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using System.Windows; using Prism.Ioc; using Prism.Unity; using TestProject.Views; namespace TestProject { /// <summary> /// 메인 애플리케이션 /// </summary> public partial class MainApplication : PrismApplication { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Protected #region 쉘 생성하기 - CreateShell() /// <summary> /// 쉘 생성하기 /// </summary> /// <returns>쉘</returns> protected override Window CreateShell() { return Container.Resolve<MainWindow>(); } #endregion #region 타입 등록하기 - RegisterTypes(containerRegistry) /// <summary> /// 타입 등록하기 /// </summary> /// <param name="containerRegistry">컨테이너 레지스트리 인터페이스</param> protected override void RegisterTypes(IContainerRegistry containerRegistry) { } #endregion } } |
