[UWP] Compress App

출처 : https://www.youtube.com/watch?v=eBBmSTgDQ0A&t=2s

보통 공부를 할때 유투브에 있는 간단한 강의를 들으면서 알아가는데 코드가 정말 깔끔하다.

몇개를 더 공부해보면서 알아가야겠다.

1. Universal Window Blank App 을 선택한다

2. Library class를 만든다

Library.cs

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using Windows.Foundation; using Windows.Storage; using Windows.Storage.Compression; using Windows.Storage.Pickers; using Windows.Storage.Streams; using Windows.UI.Popups; using Windows.UI.Xaml.Controls; namespace UWPCompressApp { public class Library { private const string textExt = ".txt"; private const string compressedExt = ".compressed"; private CompressAlgorithm algorithm = CompressAlgorithm.Lzms; public void Show(string content, string title) { IAsyncOperation<IUICommand> command = new MessageDialog(content, title).ShowAsync(); } public async Task<bool> Confirm(string content, string title, string ok, string cancel) { bool result = false; MessageDialog dialog = new MessageDialog(content, title); dialog.Commands.Add(new UICommand(ok, new UICommandInvokedHandler((cmd) => result = true))); dialog.Commands.Add(new UICommand(cancel, new UICommandInvokedHandler((cmd) => result = false))); await dialog.ShowAsync(); return result; } public async void New(TextBox display) { if (await Confirm("Create New?", "Compression App", "Yes", "No")) display.Text = string.Empty; } public async void Open(TextBox display) { try { FileOpenPicker picker = new FileOpenPicker(); picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary; picker.FileTypeFilter.Add(textExt); picker.FileTypeFilter.Add(compressedExt); StorageFile file = await picker.PickSingleFileAsync(); switch (file.FileType) { case textExt: display.Text = await FileIO.ReadTextAsync(file); break; case compressedExt: using (MemoryStream stream = new MemoryStream()) using (IInputStream input = await file.OpenSequentialReadAsync()) using (Decompressor decompressor = new Decompressor(input)) using (IRandomAccessStream output = stream.AsRandomAccessStream()) { long inputSize = input.AsStreamForRead().Length; ulong outputSize = await RandomAccessStream.CopyAsync(decompressor, output); output.Seek(0); display.Text = await new StreamReader(output.AsStream()).ReadToEndAsync(); Show(string.Format("Decompressed {0} bytes to {0} bytes", inputSize, outputSize), "Compression App"); } break; default: break; } } catch { } } public async void Save(TextBox display) { try { StringBuilder text = new StringBuilder(); FileSavePicker picker = new FileSavePicker(); picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary; picker.FileTypeChoices.Add("Text File", new List<string>() { textExt }); picker.FileTypeChoices.Add("Compressed File", new List<string>() { compressedExt }); picker.DefaultFileExtension = textExt; StorageFile file = await picker.PickSaveFileAsync(); switch (file.FileType) { case textExt: await FileIO.WriteTextAsync(file, display.Text); break; case compressedExt: using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(display.Text))) using (IRandomAccessStream input = stream.AsRandomAccessStream()) using (IRandomAccessStream output = await file.OpenAsync(FileAccessMode.ReadWrite)) using (Compressor compressor = new Compressor(output.GetOutputStreamAt(0), algorithm, 0)) { ulong inputSize = await RandomAccessStream.CopyAndCloseAsync(input, compressor); bool finished = await compressor.FinishAsync(); ulong outputSize = output.Size; Show(string.Format("Compressed {0} btytes to {1} bytes", inputSize, outputSize), "Compression App"); } break; } } catch { } } public void Sample(TextBox display) { StringBuilder text = new StringBuilder(); for(int i=0;i<20;i++) { text.AppendLine("text"+ "and another text \n"); } display.Text = text.ToString(); } } }

MainPage.xaml

<Page x:Class="UWPCompressApp.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:UWPCompressApp" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <TextBox Name="Display" AcceptsReturn="True" TextWrapping="Wrap" VerticalAlignment="Stretch"/> </Grid> <Page.BottomAppBar> <AppBar IsOpen="True" IsSticky="True"> <StackPanel Orientation="Horizontal"> <AppBarButton Icon="Page" Label="New" Name="New" Click="New_Click"/> <AppBarButton Icon="Folder" Label="Open" Name="Open" Click="Open_Click"/> <AppBarButton Icon="Save" Label="Save" Name="Save" Click="Save_Click"/> <AppBarButton Icon="Document" Label="sample" Name="Sample" Click="Sample_Click"/> </StackPanel> </AppBar> </Page.BottomAppBar> </Page>

MainPage.xaml.cs

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Runtime.InteropServices.WindowsRuntime; using Windows.Foundation; using Windows.Foundation.Collections; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows.UI.Xaml.Input; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Navigation; // 빈 페이지 항목 템플릿은 http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409 에 문서화되어 있습니다. namespace UWPCompressApp { /// <summary> /// 자체적으로 사용하거나 프레임 내에서 탐색할 수 있는 빈 페이지입니다. /// </summary> public sealed partial class MainPage : Page { Library lib = new Library(); public MainPage() { this.InitializeComponent(); } private void New_Click(object sender, RoutedEventArgs e) { lib.New(Display); } private void Open_Click(object sender, RoutedEventArgs e) { lib.Open(Display); } private void Save_Click(object sender, RoutedEventArgs e) { lib.Save(Display); } private void Sample_Click(object sender, RoutedEventArgs e) { lib.Sample(Display); } } }

결과 화면

1. Sample

2. New File

3. Open file

4. Save File