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();
            }
        }
 
    }
}
　　

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