{"id":42891,"date":"2024-11-13T22:28:05","date_gmt":"2024-11-13T22:28:05","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=42891"},"modified":"2024-11-26T06:34:34","modified_gmt":"2024-11-26T06:34:34","slug":"mvvm-3-asynchronous-programming%ea%b3%bc-mvvm-ui-%ec%8a%a4%eb%a0%88%eb%93%9c%ec%99%80-%eb%b0%b1%ea%b7%b8%eb%9d%bc%ec%9a%b4%eb%93%9c-%ec%8a%a4%eb%a0%88%eb%93%9c-%ea%b0%84%ec%9d%98-%eb%b9%84%eb%8f%99","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/42891\/","title":{"rendered":"[MVVM] 3.Asynchronous Programming\uacfc MVVM, UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \ube44\ub3d9\uae30 \uc791\uc5c5 \ucc98\ub9ac"},"content":{"rendered":"<h2>\ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uacfc MVVM: UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \ube44\ub3d9\uae30 \uc791\uc5c5 \ucc98\ub9ac<\/h2>\n<p>WPF(Windows Presentation Foundation)\uc5d0\uc11c MVVM(Model-View-ViewModel) \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ucd95\ud560 \ub54c, \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uc131\ub2a5\uacfc \uc0ac\uc6a9\uc790 \uacbd\ud5d8\uc744 \ud06c\uac8c \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\ub294 \ud544\uc218 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uac1c\ub150\uc744 \ub2e4\ub8e8\uace0, MVVM \uc544\ud0a4\ud14d\ucc98 \ub0b4\uc5d0\uc11c \uc5b4\ub5bb\uac8c \uc774\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \uc801\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0, \ud2b9\ud788 UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \uc791\uc5c5 \ucc98\ub9ac \ubc29\uc2dd\uc5d0 \ub300\ud574 \uc2ec\uce35\uc801\uc73c\ub85c \ub17c\uc758\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>1. \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uae30\ubcf8 \uac1c\ub150<\/h3>\n<p>\ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \ud504\ub85c\uadf8\ub7a8\uc758 \uc2e4\ud589 \ud750\ub984\uc774 \ud2b9\uc815 \uc791\uc5c5\uc758 \uc644\ub8cc\ub97c \uae30\ub2e4\ub9ac\uc9c0 \uc54a\uace0 \uacc4\uc18d \uc9c4\ud589\ub418\ub294 \ubc29\uc2dd\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc774\ub294 \ud2b9\ud788 IO \uc791\uc5c5, \ub124\ud2b8\uc6cc\ud06c \uc694\uccad, \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucffc\ub9ac \ub4f1 \uc2dc\uac04\uc774 \uc624\ub798 \uac78\ub9ac\ub294 \uc791\uc5c5\uc5d0\uc11c \uc911\uc694\ud55c\ub370, \uc774\ub7ec\ud55c \ube44\ub3d9\uae30 \ucc98\ub9ac\ub97c \ud1b5\ud574 \uc0ac\uc6a9\uc790 \uc778\ud130\ud398\uc774\uc2a4(UI)\uac00 \uba48\ucd94\uc9c0 \uc54a\ub3c4\ub85d \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>WPF\uc5d0\uc11c\ub294 <code>async<\/code>\uc640 <code>await<\/code>\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube44\ub3d9\uae30 \uba54\uc11c\ub4dc\ub97c \uc791\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubcf5\uc7a1\ud55c \ube44\ub3d9\uae30 \ucf54\ub4dc\ub97c \uac04\uacb0\ud558\uac8c \uc791\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c \ucf54\ub4dc\ub294 \uac04\ub2e8\ud55c \ube44\ub3d9\uae30 \ud568\uc218\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4:<\/p>\n<pre><code>public async Task LoadDataAsync()\n{\n    var data = await FetchDataFromServerAsync();\n    UpdateUI(data);\n}\n<\/code><\/pre>\n<h3>2. MVVM \ud328\ud134\uc5d0\uc11c\uc758 \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d<\/h3>\n<p>MVVM \ud328\ud134\uc740 UI\uc758 \ud45c\ud604\uacfc \ube44\uc988\ub2c8\uc2a4 \ub85c\uc9c1\uc744 \ubd84\ub9ac\ud558\ub294 \uac83\uc744 \ubaa9\ud45c\ub85c \ud569\ub2c8\ub2e4. \uc774\ub54c ViewModel\uc740 UI\uc640 \ubaa8\ub378 \uac04\uc758 \uc911\uc7ac\uc790 \uc5ed\ud560\uc744 \ud558\uba70, \ube44\ub3d9\uae30 \uc791\uc5c5\uc744 \ucc98\ub9ac\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4.<\/p>\n<p>ViewModel\uc5d0\uc11c\ub294 \ube44\ub3d9\uae30 \uba54\uc11c\ub4dc\ub97c \ud638\ucd9c\ud558\uc5ec \ub370\uc774\ud130\ub97c \ub85c\ub4dc\ud558\uace0, \uc774 \ub370\uc774\ud130\ub97c UI\uc5d0 \ubc14\uc778\ub529\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub2e4\uc74c\uc740 ViewModel\uc5d0\uc11c \ube44\ub3d9\uae30 \ub370\uc774\ud130 \ub85c\ub4dc\ub97c \ucc98\ub9ac\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4:<\/p>\n<pre><code>public class MainViewModel : INotifyPropertyChanged\n{\n    private ObservableCollection<item> _items;\n\n    public ObservableCollection<item> Items\n    {\n        get { return _items; }\n        set\n        {\n            _items = value;\n            OnPropertyChanged();\n        }\n    }\n\n    public async Task LoadItemsAsync()\n    {\n        Items = new ObservableCollection<item>(await FetchItemsFromDatabase());\n    }\n}\n<\/item><\/item><\/item><\/code><\/pre>\n<p>\uc774\ub97c \ud1b5\ud574 UI \uc2a4\ub808\ub4dc\ub294 \ub370\uc774\ud130 \ucc98\ub9ac\ub97c \uae30\ub2e4\ub9ac\uc9c0 \uc54a\uace0 \uc0ac\uc6a9\uc790\uc640 \uc0c1\ud638\uc791\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3. UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \uc791\uc5c5 \ucc98\ub9ac<\/h3>\n<p>WPF \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c\ub294 \ubaa8\ub4e0 UI \uc5c5\ub370\uc774\ud2b8\uac00 UI \uc2a4\ub808\ub4dc\uc5d0\uc11c \uc218\ud589\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \ube44\ub3d9\uae30 \uc791\uc5c5\uc774 \uc785\ub825, \ub370\uc774\ud130 \ub85c\ub4dc \ub610\ub294 \ub124\ud2b8\uc6cc\ud06c \uc694\uccad\uc744 \ud3ec\ud568\ud558\ub294 \uacbd\uc6b0, UI \uc2a4\ub808\ub4dc\ub97c \ucc28\ub2e8\ud558\uc9c0 \uc54a\ub3c4\ub85d \uc8fc\uc758\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \uc704\ud574 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc791\uc5c5\uc744 \ucc98\ub9ac\ud558\uace0, \uadf8 \uacb0\uacfc\ub97c UI \uc2a4\ub808\ub4dc\ub85c \uc548\uc804\ud558\uac8c \uc804\ub2ec\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<p>WPF\uc5d0\uc11c\ub294 <code>SynchronizationContext<\/code>\ub97c \uc0ac\uc6a9\ud558\uc5ec UI \uc2a4\ub808\ub4dc\uc5d0 \uc548\uc804\ud558\uac8c \uc811\uadfc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \uc608\uc81c\ub294 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc\uc5d0\uc11c \ub370\uc774\ud130\ub97c \ub85c\ub4dc\ud55c \ub2e4\uc74c UI \uc2a4\ub808\ub4dc\uc5d0\uc11c \uc774\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4:<\/p>\n<pre><code>public async Task LoadItemsAsync()\n{\n    var items = await Task.Run(() =&gt; FetchItemsFromDatabase());\n    Application.Current.Dispatcher.Invoke(() =&gt; Items = new ObservableCollection<item>(items));\n}\n<\/item><\/code><\/pre>\n<h3>4. \ube44\ub3d9\uae30 \uba85\ub839 \ubc0f \uc0ac\uc6a9\uc790 \uacbd\ud5d8<\/h3>\n<p>MVVM \ud328\ud134\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 ICommand \uc778\ud130\ud398\uc774\uc2a4\ub294 \ube44\ub3d9\uae30 \uc791\uc5c5\uc744 \ucc98\ub9ac\ud558\ub294 \ub370 \uc0ac\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub54c \ube44\ub3d9\uae30 \uba85\ub839\uc744 \uad6c\ud604\ud558\uc5ec UI\uc5d0\uc11c \uc0ac\uc6a9\uc790\uac00 \ubc84\ud2bc \ud074\ub9ad\uacfc \uac19\uc740 \uc791\uc5c5\uc744 \ud588\uc744 \ub54c \ube44\ub3d9\uae30\uc801\uc73c\ub85c \uc2e4\ud589\ub418\ub3c4\ub85d \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \ucf54\ub4dc\ub294 AsyncCommand\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube44\ub3d9\uae30 \uc791\uc5c5\uc744 \ucd94\uac00\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4:<\/p>\n<pre><code>public class AsyncCommand : ICommand\n{\n    private readonly Func<task> _execute;\n    private bool _isExecuting;\n\n    public event EventHandler CanExecuteChanged;\n\n    public AsyncCommand(Func<task> execute)\n    {\n        _execute = execute;\n    }\n\n    public bool CanExecute(object parameter)\n    {\n        return !_isExecuting;\n    }\n\n    public async void Execute(object parameter)\n    {\n        _isExecuting = true;\n        CanExecuteChanged?.Invoke(this, EventArgs.Empty);\n        await _execute();\n        _isExecuting = false;\n        CanExecuteChanged?.Invoke(this, EventArgs.Empty);\n    }\n}\n<\/task><\/task><\/code><\/pre>\n<p>\uc704\uc758 AsyncCommand \ud074\ub798\uc2a4\ub294 ICommand\ub97c \uad6c\ud604\ud558\uc5ec \ube44\ub3d9\uae30 \uc791\uc5c5\uc774 \uc2e4\ud589\ub418\ub294 \ub3d9\uc548 UI\uc758 \uc0c1\ud0dc\ub97c \uc5c5\ub370\uc774\ud2b8\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\n<h3>5. \ube44\ub3d9\uae30 \ucd5c\uc801\ud654 \ubc0f \uc624\ub958 \ucc98\ub9ac<\/h3>\n<p>\ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc5d0\uc11c\ub294 \uc624\ub958 \ucc98\ub9ac\ub3c4 \uc911\uc694\ud569\ub2c8\ub2e4. \ube44\ub3d9\uae30 \uba54\uc11c\ub4dc\uc5d0\uc11c \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc608\uc678\ub294 \ud638\ucd9c\ud558\ub294 \uacf3\uc5d0\uc11c \ub2e4\ub8e8\uc5b4\uc57c \ud558\uba70, \uc774\ub97c \uc704\ud574 <code>try-catch<\/code> \ube14\ub85d\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \uc608\uc81c\ub294 \ube44\ub3d9\uae30 \uba54\uc11c\ub4dc\uc5d0\uc11c \uc608\uc678\ub97c \ucc98\ub9ac\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4:<\/p>\n<pre><code>public async Task LoadItemsAsync()\n{\n    try\n    {\n        var items = await FetchItemsFromDatabase();\n        Items = new ObservableCollection<item>(items);\n    }\n    catch (Exception ex)\n    {\n        \/\/ \uc608\uc678 \ucc98\ub9ac \ub85c\uc9c1\n        MessageBox.Show($\"\uc624\ub958\uac00 \ubc1c\uc0dd\ud588\uc2b5\ub2c8\ub2e4: {ex.Message}\");\n    }\n}\n<\/item><\/code><\/pre>\n<h3>6. \uacb0\ub860<\/h3>\n<p>WPF\uc5d0\uc11c MVVM \ud328\ud134\uc744 \uc0ac\uc6a9\ud55c \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uc0ac\uc6a9\uc790 \uacbd\ud5d8\uc744 \uac1c\uc120\ud558\ub294 \ub370 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc\ub97c \uc801\uc808\ud558\uac8c \uad00\ub9ac\ud558\uba74, \ud0dc\uc2a4\ud06c\uac00 \uc644\ub8cc\ub418\uae30\ub97c \uae30\ub2e4\ub9ac\ub294 \ub3d9\uc548 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc751\ub2f5\uc131\uc744 \uc720\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uacfc \uac19\uc740 \uc8fc\uc694 \uc0ac\ud56d\uc744 \uace0\ub824\ud574\uc57c \ud569\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ube44\ub3d9\uae30 \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc2dc\uac04 \uc18c\ubaa8\uc801\uc778 \uc791\uc5c5\uc744 \ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/li>\n<li>UI \uc5c5\ub370\uc774\ud2b8\ub294 UI \uc2a4\ub808\ub4dc\uc5d0\uc11c \uc218\ud589\ud574\uc57c \ud558\ubbc0\ub85c, \uc0c1\ub300\uc801\uc73c\ub85c \ub290\ub9b0 \uc791\uc5c5\uc758 \uacbd\uc6b0 <code>Task.Run<\/code>\uc744 \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<li>\ube44\ub3d9\uae30 \uba85\ub839\uc744 \ud65c\uc6a9\ud558\uc5ec \uc0ac\uc6a9\uc790 \uc0c1\ud638\uc791\uc6a9\uacfc\uc758 \uc77c\uad00\uc131\uc744 \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/li>\n<li>\uc624\ub958 \ucc98\ub9ac\ub294 \ube44\ub3d9\uae30 \uc791\uc5c5\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud558\ubbc0\ub85c \uc801\uc808\ud55c \uc624\ub958 \ucc98\ub9ac\ub97c \uad6c\ud604\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc774\ub7ec\ud55c \uac1c\ub150\uc744 \ud65c\uc6a9\ud568\uc73c\ub85c\uc368, \uac1c\ubc1c\uc790\ub294 \ubcf4\ub2e4 \ub098\uc740 \uc131\ub2a5\uacfc \uc0ac\uc6a9\uc790 \ub9cc\uc871\ub3c4\ub97c \uc81c\uacf5\ud558\ub294 WPF \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ucd95\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \ub2e8\uc21c\ud788 \uc131\ub2a5\uc744 \ub192\uc774\uae30 \uc704\ud55c \uae30\uc220\uc774 \uc544\ub2c8\ub77c, \uc0ac\uc6a9\uc790\uc640\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \ub354\uc6b1 \ubd80\ub4dc\ub7fd\uace0 \uc9c1\uad00\uc801\uc73c\ub85c \ub9cc\ub4e4\uc5b4\uc8fc\ub294 \ub3c4\uad6c\uc785\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uacfc MVVM: UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \ube44\ub3d9\uae30 \uc791\uc5c5 \ucc98\ub9ac WPF(Windows Presentation Foundation)\uc5d0\uc11c MVVM(Model-View-ViewModel) \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ucd95\ud560 \ub54c, \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \uc131\ub2a5\uacfc \uc0ac\uc6a9\uc790 \uacbd\ud5d8\uc744 \ud06c\uac8c \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\ub294 \ud544\uc218 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \ube44\ub3d9\uae30 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uac1c\ub150\uc744 \ub2e4\ub8e8\uace0, MVVM \uc544\ud0a4\ud14d\ucc98 \ub0b4\uc5d0\uc11c \uc5b4\ub5bb\uac8c \uc774\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \uc801\uc6a9\ud560 \uc218 \uc788\ub294\uc9c0, \ud2b9\ud788 UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \uc791\uc5c5 \ucc98\ub9ac \ubc29\uc2dd\uc5d0 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/42891\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;[MVVM] 3.Asynchronous Programming\uacfc MVVM, UI \uc2a4\ub808\ub4dc\uc640 \ubc31\uadf8\ub77c\uc6b4\ub4dc \uc2a4\ub808\ub4dc \uac04\uc758 \ube44\ub3d9\uae30 \uc791\uc5c5 \ucc98\ub9ac&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[39],"tags":[],"class_list":["post-42891","post","type-post","status-publish","format-standard","hentry","category-wpf-"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - 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