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

原文: 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]

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