（转）Windows Phone7隔离存储空间

原文地址：http://www.cnblogs.com/xieLongBao/archive/2012/02/28/2372311.html
Windows Phone7隔离存储空间
隔离存储空间：
目录操作
文件操作
应用程序配置信息
隔离存储空间的概念：所有文件IO操作被限制在隔离存储空间里面，在隔离存储空间里面可以增删改目录和文件，在隔离存储空间里面可以存储程序配置信息
重要的类：
IsolatedStorageFile用于操控隔离存储空间里面的目录及文件，
IsolatedStorageFileStream用于读写操控隔离存储空间里面的流
IsolatedStorageFileSettings用于存储程序配置信息的Dictionary
配额管理：
windows phone下的隔离存储空间没有配额的限制
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 Microsoft.Phone.Controls;
using System.IO.IsolatedStorage;
using System.IO;
namespace IsolatedStorage
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();
        }
 
        private const string foldername = "temp1";
        private const string filename = foldername + "/address.txt";
        private const string settingname = "sname";
        /// <summary>
        /// 创建文件夹
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                file.CreateDirectory(foldername);
            }
        }
        /// <summary>
        /// 检查文件夹是否存在
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                if (file.DirectoryExists(foldername))
                {
                    MessageBox.Show("已存在");
                }
                else
                {
                    MessageBox.Show("不存在");
                }
            }
        }
        /// <summary>
        /// 删除目录
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                file.DeleteDirectory(foldername);
            }
        }
        /// <summary>
        /// 创建文件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                IsolatedStorageFileStream stream = file.CreateFile(filename);
                stream.Close();
            }
        }
        /// <summary>
        /// 检查文件是否存在
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                if (file.FileExists(filename))
                {
                    MessageBox.Show("已存在" + filename);
                }
                else
                {
                    MessageBox.Show("不存在");
                }
            }
        }
        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                file.DeleteFile(filename);
            }
        }
        /// <summary>
        /// 向文件里增加内容
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button7_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                using (IsolatedStorageFileStream stream = file.OpenFile(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                {
                    StreamWriter writer = new StreamWriter(stream);
                    writer.WriteLine(textBox1.Text);
                    writer.Close();
                    textBox1.Text = "";
                }
                
            }
        }
        /// <summary>
        /// 读取文件内容
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button8_Click(object sender, RoutedEventArgs e)
        {
            using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
            {
                using (IsolatedStorageFileStream stream = file.OpenFile(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                {
                  using (StreamReader  reader=new StreamReader (stream))
                  {
                      textBox1.Text = reader.ReadToEnd();
                  }
                }
 
            }
        }
        /// <summary>
        /// 程序配置信息保存
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button9_Click(object sender, RoutedEventArgs e)
        {
            IsolatedStorageSettings.ApplicationSettings[settingname] = textBox2.Text;
            IsolatedStorageSettings.ApplicationSettings.Save();
            textBox2.Text = "";
        }
        /// <summary>
        /// 程序配置信息读取
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button10_Click(object sender, RoutedEventArgs e)
        {
            if (IsolatedStorageSettings.ApplicationSettings.Contains(settingname))
            {
                textBox2.Text = IsolatedStorageSettings.ApplicationSettings[settingname].ToString();
            }
        }
 
    }
}