WP8独立存储 总结

</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";  
            }  
        }  
    }