wp8独立存储 总结

<p>1、设置与属性的存储</p><p>2、本地文件的存储</p>
           

</pre><pre name="code" class="csharp">//独立存储  键值对IsolatedStorageSettings（独立本地设置）: 命名空间为：System.IO.IsolatedStorage.IsolatedStorageSettings，提供了一系列的API，用来在独立存储中存储和操作键/值对。一般使用该方式来存储App设置和用户特定设置。
        IsolatedStorageSettings mysetting = IsolatedStorageSettings.ApplicationSettings;

        protected override void OnNavigatedFrom(NavigationEventArgs e)//重写onnavigatefrom
        {
            base.OnNavigatedFrom(e);
            mysetting["text"] = this.tex.Text;//textbox设置存储
            mysetting["check"] = checkbox.IsChecked;//checkbox的设置存储

            mysetting["radio1"] = radio1.IsChecked;//radio设置存储
            mysetting["radio2"] = radio2.IsChecked;
            mysetting.Save();
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)//重写onnaviatefrom
        {
            base.OnNavigatedTo(e);
            if(mysetting.Contains("text"))
            tex.Text = mysetting["text"] as string;
            if (mysetting.Contains("check"))
            {
                checkbox.IsChecked = (bool)mysetting["check"];
            }
            if(mysetting.Contains("radio1"))
            {
                radio1.IsChecked = (bool)mysetting["radio1"];
            }
            if (mysetting.Contains("radio2"))
            {
                radio2.IsChecked = (bool)mysetting["radio2"];
            }
        }

        //命名空间为：System.IO.IsolatedStorage.IsolatedStorageFile，可以在虚拟的独立存储中创建、使用、删除文件和目录， 使用System.IO.IsolatedStorage.IsolatedFileStream，通过文件流（file stream）可以添加或者检索文件。独立文件流可以存储从web动态加载的图片、声音和文件。
        IsolatedStorageFile filestorage = IsolatedStorageFile.GetUserStoreForApplication();//实例化IsolatedStorageFile对象
        
        //往isolatedstorage写数据
        private void xie_Click(object sender, RoutedEventArgs e)
        {
            //创建文件夹
            // 首先判断目录是否存在，不存在的话创建目录
            if (!filestorage.DirectoryExists("myFolder"))
            {
                filestorage.CreateDirectory("myFolder");
            }
            //创建文件并写入数据
            using (var isofilestream = new IsolatedStorageFileStream("myFolder/storage.txt", FileMode.OpenOrCreate, filestorage))
            {
                using (var filewriter = new StreamWriter(isofilestream))
                {
                    filewriter.WriteLine(this.tex.Text);
                }
            }
        }

        从Isolated Storage中读取数据
        private void du_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                using (var isofilestream = new IsolatedStorageFileStream("myFolder/storage.txt", FileMode.Open, filestorage))
                {
                    using (var filereader = new StreamReader(isofilestream))
                    {
                        this.textbolck.Text = filereader.ReadLine();//文件
                    }
                }
            }
            catch {
                this.textbolck.Text = "读取出错，请先创建文件夹与文件";
            }
        }
    }