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("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
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();
}
……
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