Windows Phone 7 便捷记事本实例

这是一个很简单的记事本，利用了本地存储实时记录下你写下的内容，退出程序的时候将自动保存记事本的内容。下面的工具条是放大和缩小字体的功能。

用自定义的QuickNotesSettings类来保存记事本的内容和字体的大小，同时封装了记事本的加载方法和保存方法。

 
 


  
  
using System;  

  
  
using System.IO.IsolatedStorage;  

  
  
using System.Windows;  

  
  
 

  
  
namespace QuickNotes  

  
  
{  

  
  
    public class QuickNotesSettings  

  
  
    {  

  
  
        public QuickNotesSettings()  

  
  
        {  

  
  
            this.Text = "";  

  
  
            this.FontSize = (double)Application.Current.Resources["PhoneFontSizeMediumLarge"];  

  
  
        }  

  
  
 

  
  
        public string Text { set; get; }  

  
  
        public double FontSize { set; get; }  

  
  
        //静态方法获取本地存储的记事本内容  

  
  
        public static QuickNotesSettings Load()  

  
  
        {  

  
  
            IsolatedStorageSettings isoSettings = IsolatedStorageSettings.ApplicationSettings;  

  
  
            QuickNotesSettings settings;  

  
  
 

  
  
            if (!isoSettings.TryGetValue<QuickNotesSettings>("settings", out settings))  

  
  
                settings = new QuickNotesSettings();  

  
  
 

  
  
            return settings;  

  
  
        }  

  
  
        //保存到本地存储中  

  
  
        public void Save()  

  
  
        {  

  
  
            IsolatedStorageSettings isoSettings = IsolatedStorageSettings.ApplicationSettings;  

  
  
            isoSettings["settings"] = this;//保存的就是这个类的实例  

  
  
        }  

  
  
    }  

  
  
} 
 
 

xaml文件

 
 


  
  
<!--LayoutRoot contains the root grid where all other 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="12,17,0,28"> 

  
  
            <TextBlock x:Name="ApplicationTitle" Text="Quick Notes" Style="{StaticResource PhoneTextNormalStyle}"/> 

  
  
        </StackPanel> 

  
  
 

  
  
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"> 

  
  
            <TextBox Name="txtbox" 

  
  
                     TextWrapping="Wrap" 

  
  
                     AcceptsReturn="True" 

  
  
                     VerticalScrollBarVisibility="Auto" 

  
  
                     TextChanged="OnTextBoxTextChanged" /> 

  
  
        </Grid> 

  
  
    </Grid> 

  
  
      

  
  
    <phone:PhoneApplicationPage.ApplicationBar> 

  
  
        <shell:ApplicationBar> 

  
  
            <!--缩小--> 

  
  
            <shell:ApplicationBarIconButton IconUri="/Images/littleletter.icon.png"   

  
  
                                            Text="smaller font" 

  
  
                                            Click="OnAppBarSmallerFontClick" /> 

  
  
            <!--放大--> 

  
  
            <shell:ApplicationBarIconButton IconUri="/Images/bigletter.icon.png"   

  
  
                                            Text="larger font" 

  
  
                                            Click="OnAppBarLargerFontClick" /> 

  
  
        </shell:ApplicationBar> 

  
  
    </phone:PhoneApplicationPage.ApplicationBar> 
 
 

对应的cs后台文件

 
 


  
  
using System;  

  
  
using System.Windows;  

  
  
using System.Windows.Controls;  

  
  
using Microsoft.Phone.Controls;  

  
  
 

  
  
namespace QuickNotes  

  
  
{  

  
  
    public partial class MainPage : PhoneApplicationPage  

  
  
    {  

  
  
        QuickNotesSettings appSettings = (Application.Current as App).AppSettings;  

  
  
          

  
  
        public MainPage()  

  
  
        {  

  
  
            InitializeComponent();  

  
  
 

  
  
            txtbox.Text = appSettings.Text;  

  
  
            txtbox.FontSize = appSettings.FontSize;  

  
  
        }  

  
  
        //即时保存记事本的内容到，本地存储中去  

  
  
        void OnTextBoxTextChanged(object sender, TextChangedEventArgs args)  

  
  
        {  

  
  
            appSettings.Text = txtbox.Text;  

  
  
        }  

  
  
        //缩小字体  

  
  
        void OnAppBarSmallerFontClick(object sender, EventArgs args)  

  
  
        {  

  
  
            txtbox.FontSize = Math.Max(12, txtbox.FontSize - 1);  

  
  
            appSettings.FontSize = txtbox.FontSize;  

  
  
        }  

  
  
        //放大字体  

  
  
        void OnAppBarLargerFontClick(object sender, EventArgs args)  

  
  
        {  

  
  
            txtbox.FontSize = Math.Min(48, txtbox.FontSize + 2);  

  
  
            appSettings.FontSize = txtbox.FontSize;  

  
  
        }  

  
  
    }  

  
  
} 
 
 

app.xaml.cs主程序文件修改

 
 


  
  
……  

  
  
public QuickNotesSettings AppSettings { set; get; }  

  
  
        public PhoneApplicationFrame RootFrame { get; private set; }  

  
  
 

  
  
        public App()  

  
  
        {  

  
  
 

  
  
            UnhandledException += Application_UnhandledException;  

  
  
            InitializeComponent();  

  
  
            InitializePhoneApplication();  

  
  
        }  

  
  
 

  
  
        private void Application_Launching(object sender, LaunchingEventArgs e)  

  
  
        {  

  
  
            AppSettings = QuickNotesSettings.Load();  

  
  
        }  

  
  
 

  
  
        private void Application_Activated(object sender, ActivatedEventArgs e)  

  
  
        {  

  
  
            AppSettings = QuickNotesSettings.Load();  

  
  
        }  

  
  
 

  
  
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)  

  
  
        {  

  
  
            AppSettings.Save();  

  
  
        }  

  
  
 

  
  
        private void Application_Closing(object sender, ClosingEventArgs e)  

  
  
        {  

  
  
            AppSettings.Save();  

  
  
        }  

  
  
…… 
 
 

本文转自linzheng 51CTO博客，原文链接:http://blog.51cto.com/linzheng/1079152