開発環境
- OS: Windows 10 Pro
- IDE(統合開発環境): Visual Studio Community 2017
Head First C# ―頭とからだで覚えるC#の基本 (Andrew Stellman (著)、Jennifer Greene (著)、佐藤 嘉一 (監修, 監修)、木下 哲也 (翻訳)、オライリージャパン)の7章(ファイルの読み書き - バイト配列を保存し、世界を救う)、StreamWriterマグネットを取り組んでみる。
コード
MainPage.xaml
<?xml version="1.0" encoding="utf-8" ?> <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:local="clr-namespace:App2" x:Class="App2.MainPage"> <StackLayout> <Button x:Name="button1" Text="button1" Clicked="button1_Clicked" /> </StackLayout> </ContentPage>
MainPage.xaml.cs
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Xamarin.Forms; using System.IO; namespace App2 { public partial class MainPage : ContentPage { public MainPage() { InitializeComponent(); } private void button1_Clicked(object sender, EventArgs e) { Flobbo flobbo = new Flobbo("青 黄色"); StreamWriter sw = flobbo.Snobb(); flobbo.Blobbo(flobbo.Blobbo(flobbo.Blobbo(sw), sw), sw); } } public class Flobbo { private string zap; public Flobbo(string zap) { this.zap = zap; } public StreamWriter Snobb() { return new StreamWriter(@"C:\macaw.txt"); } public bool Blobbo(StreamWriter sw) { sw.WriteLine(zap); zap = "緑 紫"; return false; } public bool Blobbo(bool already, StreamWriter sw) { if (already) { sw.WriteLine(zap); sw.Close(); return false; } else { sw.WriteLine(zap); zap = "赤 オレンジ"; return true; } } } }
App.xaml
<?xml version="1.0" encoding="utf-8" ?> <Application xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="App1.App"> <Application.Resources> </Application.Resources> </Application>
App.xaml.cs
using System; using Xamarin.Forms; using Xamarin.Forms.Xaml; [assembly: XamlCompilation (XamlCompilationOptions.Compile)] namespace App2 { public partial class App : Application { public App () { InitializeComponent(); // MainPage = new MainPage(); MainPage = new NavigationPage( new MainPage() { Title = "" }); } protected override void OnStart () { // Handle when your app starts } protected override void OnSleep () { // Handle when your app sleeps } protected override void OnResume () { // Handle when your app resumes } } }
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