与众不同 windows phone (6) - Isolated Storage(独立存储)

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与众不同 windows phone (6) - Isolated Storage(独立存储)



作者:webabcd


介绍
与众不同 windows phone 7.5 (sdk 7.1) 之独立存储

  • 概述
  • 独立存储的读/写的Demo
  • 读/写 key/value 形式数据到独立存储的快捷方法



示例
1、概述
Summary.xaml

<phone:PhoneApplicationPage 
    x:Class="Demo.IsolatedStorageDemo.Summary"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <ScrollViewer>
            <TextBlock TextWrapping="Wrap">
                <Run>Isolated Storage 概述</Run>
                <LineBreak />
                <LineBreak />
                <Run>通过 IsolatedStorageFile 操作独立存储;通过 IsolatedStorageSettings 可方便地在独立存储中操作 key/value 形式的数据</Run>
                <LineBreak />
                <LineBreak />
                <Run>独立存储内的特殊用途的文件夹</Run>
                <LineBreak />
                <Run>1、Shared/Media - 保存专辑封面</Run>
                <LineBreak />
                <Run>2、Shared/ShellContent - 保存 tile 的背景图</Run>
                <LineBreak />
                <Run>3、Shared/Transfers - 用于保存后台传输任务的 上传/下载 数据</Run>
                <LineBreak />
                <LineBreak />
                <Run>独立存储资源管理器的使用,该工具在类似如下的地址 C:\Program Files\Microsoft SDKs\Windows Phone\v7.1\Tools\IsolatedStorageExplorerTool\ISETool.exe</Run>
                <LineBreak />
                <Run>1、显示根目录下的目录及文件列表 ISETool.exe dir xd 0fb9e5a3-d4e0-4b0f-b56e-a347bfda0480(id 为 ProductId,可在 WMAppManifest.xml 中找到)</Run>
                <LineBreak />
                <Run>2、显示指定目录下的目录及文件列表 ISETool.exe dir:"Folder" xd 0fb9e5a3-d4e0-4b0f-b56e-a347bfda0480</Run>
                <LineBreak />
                <Run>3、从独立存储复制数据到计算机 ISETool.exe ts xd 0fb9e5a3-d4e0-4b0f-b56e-a347bfda0480 "C:\MyData"(会在此目录下创建一个名为 IsolatedStore 的子目录)</Run>
                <LineBreak />
                <Run>4、从计算机复制数据到独立存储 ISETool.exe rs xd 0fb9e5a3-d4e0-4b0f-b56e-a347bfda0480 "C:\MyData\IsolatedStore"</Run>
                <LineBreak />
                <LineBreak />
                <Run>在多线程操作独立存储的场景下,建议使用互斥锁,即 System.Threading.Mutex</Run>
                <LineBreak />
                <LineBreak />
                <Run>温馨小提示:appdata:/ 代表程序包内;isostore:/ 代表独立存储。默认为独立存储</Run>
            </TextBlock>
        </ScrollViewer>
    </Grid>

</phone:PhoneApplicationPage>


2、演示如何 读/写 独立存储
ReadWriteDemo.xaml

<phone:PhoneApplicationPage 
    x:Class="Demo.IsolatedStorageDemo.ReadWriteDemo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <StackPanel Orientation="Vertical">
            
            <TextBlock x:Name="lblMsg" />
            
            <Button x:Name="btnWrite" Content="写入" Click="btnWrite_Click" />
            
            <Button x:Name="btnRead" Content="读取" Click="btnRead_Click" />
            
        </StackPanel>
    </Grid>

</phone:PhoneApplicationPage>

ReadWriteDemo.xaml.cs

/*
 * Isolated Storage - 独立存储
 * 
 * IsolatedStorageFile - 操作 独立存储 的类
 *     IsolatedStorageFile.GetUserStoreForApplication() - 按应用程序获取用户的独立存储
 *     
 *     DirectoryExists(path) - 指定的路径是否存在
 *     CreateDirectory(path) - 创建指定的路径
 *     FileExists(path) - 指定的文件是否存在
 *     CreateFile(path) - 创建指定的文件
 *     GetDirectoryNames() - 获取根目录下的目录名数组
 *     GetFileNames()() - 获取根目录下的文件名数组
 *     GetDirectoryNames(path) - 获取指定目录下的目录名数组
 *     GetFileNames(path) - 获取指定目录下的文件名数组
 *     GetCreationTime(path) - 返回指定文件夹或文件的创建时间
 *     GetLastAccessTime(path) - 返回指定文件夹或文件最近一次被访问的时间
 *     GetLastWriteTime(path) - 返回指定文件夹或文件最近一次被写入内容的时间
 *     OpenFile() - 打开指定的文件。具体参数参看文档
 *     CopyFile(String, String, Boolean) - 复制文件,可以指定是否覆盖已有文件
 *     MoveDirectory() - 移动文件夹
 *     MoveFile() - 移动文件
 *     DeleteFile(path) - 删除指定的文件
 *     DeleteDirectory(path) - 删除指定的目录(要求目录存在,且目录内无内容)
 *     Remove() - 关闭 IsolatedStorageFile 对象并移除独立存储内的全部内容
 *     
 *     AvailableFreeSpace - 独立存储目前的可用空间
 *     Quota - 配额,即程序上允许的最大可用空间(wp7中这个属性没什么用,因为没有配额限制)
 *     IncreaseQuotaTo() - 请求允许一个更大的配额(wp7中这个属性没什么用,因为没有配额限制)
 */

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 Demo.IsolatedStorageDemo
{
    public partial class ReadWriteDemo : PhoneApplicationPage
    {
        public ReadWriteDemo()
        {
            InitializeComponent();

            this.Loaded += new RoutedEventHandler(TextReadWrite_Loaded);
        }

        void TextReadWrite_Loaded(object sender, RoutedEventArgs e)
        {
            IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
            lblMsg.Text = "可用空间:" + isf.AvailableFreeSpace / 1024 / 1024 + "MB";
        }

        private void btnWrite_Click(object sender, RoutedEventArgs e)
        {
            IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();

            isf.CreateDirectory("Folder");

            // IsolatedStorageFileStream - 独立存储内的文件流。继承自 FileStream
            using (var isfs = new IsolatedStorageFileStream(@"Folder\File.txt", FileMode.OpenOrCreate, isf))
            {
                using (var sw = new StreamWriter(isfs))
                {
                    sw.WriteLine("hello webabcd");
                }
            }
        }

        private void btnRead_Click(object sender, RoutedEventArgs e)
        {
            IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();

            try
            {
                // IsolatedStorageFileStream - 独立存储内的文件流。继承自 FileStream
                using (var isfs = new IsolatedStorageFileStream(@"Folder\File.txt", FileMode.Open, isf))
                {
                    using (var sr = new StreamReader(isfs))
                    {
                        MessageBox.Show(sr.ReadLine());
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
    }
}


3、演示读/写 key/value 形式数据到独立存储的快捷方法
IsolatedStorageSettingsDemo.xaml

<phone:PhoneApplicationPage 
    x:Class="Demo.IsolatedStorageDemo.IsolatedStorageSettingsDemo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <StackPanel Orientation="Vertical">

            <Button x:Name="btnWrite" Content="写入" Click="btnWrite_Click" />

            <Button x:Name="btnRead" Content="读取" Click="btnRead_Click" />

        </StackPanel>
    </Grid>

</phone:PhoneApplicationPage>

IsolatedStorageSettingsDemo.xaml.cs

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;

namespace Demo.IsolatedStorageDemo
{
    public partial class IsolatedStorageSettingsDemo : PhoneApplicationPage
    {
        public IsolatedStorageSettingsDemo()
        {
            InitializeComponent();
        }

        private void btnWrite_Click(object sender, RoutedEventArgs e)
        {
            /*
             * IsolatedStorageSettings - 用非常方便的方法在独立存储中保存 key/value 形式的数据
             *     IsolatedStorageSettings.ApplicationSettings - 按应用程序保存 key/value 数据
             *     
             * IsolatedStorageSettings 实现的接口有:IDictionary<string, object>, ICollection<KeyValuePair<string, object>>, IEnumerable<KeyValuePair<string, object>>, IDictionary, ICollection, IEnumerable
             */

            IsolatedStorageSettings iss = IsolatedStorageSettings.ApplicationSettings;

            // 用这种方法保存 key/value 形式的数据非常简单
            iss["abc"] = "webabcd";

            // 保存 IsolatedStorageSettings 数据,但是经过测试,即使不调用此方法,数据也会被保存。但是为了保险还是调用一下 Save() 比较好
            iss.Save();
        }

        private void btnRead_Click(object sender, RoutedEventArgs e)
        {
            IsolatedStorageSettings iss = IsolatedStorageSettings.ApplicationSettings;

            // 用这种方法读取 key/value 形式的数据非常简单
            if (iss.Contains("abc"))
                MessageBox.Show((string)iss["abc"]);
        }
    }
}

 


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[源码下载]

posted @ 2012-06-20 08:52  webabcd  阅读(3249)  评论(8编辑  收藏  举报