超簡易カウンターを作ってみた

今回はファイルの読み書きの勉強。

アクセス数をカウントする
こんな感じ

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.IO;
using System.IO.IsolatedStorage;

namespace SilverlightApplication11
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            String count="1";
            IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();

            //分離ストレージ上にcount.txtが存在するかどうか
            if (store.FileExists("counter.txt"))
            {
                //counter.txtを読み込むためのストリームを生成
                IsolatedStorageFileStream readStream = store.OpenFile("counter.txt", FileMode.Open);
                //何か保存されているかどうか
                if (readStream.Length > 0)
                {
                    //内容を読む
                    StreamReader reader = new StreamReader(readStream);
                    String s = reader.ReadLine();
                    //文字列に変換
                    count = (Int16.Parse(s) + 1).ToString();
                    reader.Close();
                }
                readStream.Close();
            }

            IsolatedStorageFileStream writeStream = store.CreateFile("counter.txt");
            StreamWriter writer = new StreamWriter(writeStream);
            writer.Write(count);
            writer.Close();
            writeStream.Close();
            
            Count_text.Text = count;
        }
    }
}

<UserControl x:Class="SilverlightApplication11.MainPage"
    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" 
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480" Loaded="UserControl_Loaded">
  <Grid x:Name="LayoutRoot">
        <TextBlock x:Name="Count_text" FontSize="30" Text="AAA" Width="200" Height="50"/>
    </Grid>
</UserControl>