Windows Phone development (8): independent storage isolated storage

Foreground XAML

<Phone: phoneapplicationpage X: class = "isolatedstorageapp. mainpage "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" MC: ignorable = "D" D: designwidth = "480" D: designheight = "768" fontfamily = "{staticresource quota}" fontsize = "{staticresource quota}" foreground = "{staticresource quota}" supportedorientations = "portrait" orientation = "portrait" Shell: systemtray. isvisible = "true"> <! -- Layoutroot is the root grid where all page content is placed --> <grid X: Name = "layoutroot" background = "Transparent"> <grid. rowdefinitions> <rowdefinition Height = "Auto"/> <rowdefinition Height = "*"/> </grid. rowdefinitions> <! -- Titlepanel contains the name of the application and page title --> <stackpanel X: Name = "titlepanel" grid. row = "0" margin = ","> <textblock X: name = "applicationtitle" text = "isolated storage" style = "{staticresource phonetextnormalstyle}"/> <textblock X: name = "pagetitle" text = "standalone storage" margin = "9,-7,0, 0" style = "{staticresource phonetexttitle1style}"/> </stackpanel> <! -- Contentpanel-place additional content here --> <grid X: Name = "contentpanel" grid. row = "1" margin = ","> <textbox Height = "72" horizontalalignment = "Left" margin =, 416 "name =" txtwrite "text =" "verticalalignment =" TOP "width =" "/> <button content =" save "Height =" 72 "horizontalalignment =" left" margin = "-1,160, 160 "name =" btnwrite "verticalignment =" TOP "width =" "Click =" txtwrite_click "/> <t Extblock Height = "149" horizontalalignment = "Left" margin = "12,275, 403 "name =" txtread "text =" "verticalalignment =" TOP "width =" "/> <button content =" read "Height =" 72 "horizontalalignment =" left" margin = "-1,450, 160 "name =" btnread "verticalignment =" TOP "width =" "Click =" btnread_click "/> </GRID> <! -- Sample Code showing usage of ApplicationBar --> <! -- <Phone: phoneapplicationpage. applicationBar> <shell: ApplicationBar isvisible = "true" ismenuenabled = "true"> <shell: applicationbariconbutton iconuri = "/images/appbar_button1.png" text = "button 1"/> <shell: applicationbariconbutton iconuri = "/images/appbar_button2.png" text = "button 2"/> <shell: ApplicationBar. menuitems> <shell: applicationbarmenuitem text = "menuitem 1"/> <shell: applicationbarmenuitem text = "menuitem 2"/> </shell: ApplicationBar. menuitems> </shell: ApplicationBar> </Phone: phoneapplicationpage. applicationBar> --> </Phone: phoneapplicationpage>

 

 

Backend 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;using System.IO.IsolatedStorage;namespace IsolatedStorageApp{    public partial class MainPage : PhoneApplicationPage    {        // Constructor        public MainPage()        {            InitializeComponent();        }        private void txtWrite_Click(object sender, RoutedEventArgs e)        {            //Obtain the virtual store for application            IsolatedStorageFile myStore = IsolatedStorageFile.GetUserStoreForApplication();            //Create a new folder and call it "FavorFolder"            myStore.CreateDirectory("FavorFolder");            //Create a new file and assign a StreamWriter to the store and this new file (myFile.txt)            //Also take the text contents from the txtWrite control and write it to myFile.txt            StreamWriter writeFile = new StreamWriter(new IsolatedStorageFileStream("FavorFolder\\myFile.txt", FileMode.OpenOrCreate, myStore));            writeFile.WriteLine(txtWrite.Text);            writeFile.Close();        }        private void btnRead_Click(object sender, RoutedEventArgs e)        {            //Obtain a virtual store for application            IsolatedStorageFile myStore = IsolatedStorageFile.GetUserStoreForApplication();            //This code will open and read the contents of myFile.txt            //Add exception in case the user attempts to click Read button first.            StreamReader readFile = null;            try            {                readFile = new StreamReader(new IsolatedStorageFileStream("FavorFolder\\myFile.txt", FileMode.Open, myStore));                string fileText = readFile.ReadLine();                //The control txtRead will display the text entered in the file                txtRead.Text = fileText;                readFile.Close();            }            catch            {                txtRead.Text = "Need to create directory and the file first.";            }        }    }}

Summary: If you want to save temporary data (data between one execution cycle), you 'd better use the phoneapplicationservice class to save it; if you want to save application settings (save data between multiple execution cycles) it is best to use the independent storage isolatedstoragesettings class to save.