Windows Phone 7 Belling‘s课堂（五） 独立存储空间（1）

基本功能：

允许你输入一个目录名称，点击“创建后”，将在隔离存储中创建一个目录，然后点击

第二个按钮，可以检测目录是否存在，第三个按钮用于删除目录。

 前台UI代码：

        

View Code

 1 <phone:PhoneApplicationPage   
 2     x:Class="shiyan3.MainPage"  
 3     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
 4     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
 5     xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"  
 6     xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"  
 7     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
 8     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
 9     mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"  
10     FontFamily="{StaticResource PhoneFontFamilyNormal}"  
11     FontSize="{StaticResource PhoneFontSizeNormal}"  
12     Foreground="{StaticResource PhoneForegroundBrush}"  
13     SupportedOrientations="Portrait" Orientation="Portrait"  
14     shell:SystemTray.IsVisible="True">
15 
16     <!--LayoutRoot 是包含所有页面内容的根网格-->
17     <Grid x:Name="LayoutRoot" Background="Transparent">
18         <Grid.RowDefinitions>
19             <RowDefinition Height="Auto"/>
20             <RowDefinition Height="*"/>
21         </Grid.RowDefinitions>
22 
23         <!--TitlePanel 包含应用程序的名称和页标题-->
24         <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
25             <TextBlock x:Name="ApplicationTitle" Text="我的应用程序" Style="{StaticResource PhoneTextNormalStyle}"/>
26             <TextBlock x:Name="PageTitle" Text="隔离存储" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
27         </StackPanel>
28 
29         <!--ContentPanel - 在此处放置其他内容-->
30         <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
31             <TextBox Height="72" HorizontalAlignment="Left" Margin="12,25,0,0" Name="txtDirName" VerticalAlignment="Top" Width="289" />
32             <Button Content="创建" Height="72" HorizontalAlignment="Left" Margin="307,25,0,0" Name="btnCreate" VerticalAlignment="Top" Width="127" Click="btnCreate_Click" />
33             <Button Content="检测目录是否已存在" Height="72" HorizontalAlignment="Left" Margin="146,120,0,0" Name="btnCheck" VerticalAlignment="Top" Width="276" Click="btnCheck_Click" />
34             <Button Content="删除目录" Height="72" HorizontalAlignment="Left" Margin="0,283,0,0" Name="btnDel" VerticalAlignment="Top" Width="422" Click="btnDel_Click" />
35             <TextBlock Height="38" HorizontalAlignment="Left" Margin="9,138,0,0" Name="tbDisplay" VerticalAlignment="Top" Width="131" />
36         </Grid>
37     </Grid>
38 
39 
40 </phone:PhoneApplicationPage>

 

后台CS代码：

 

View Code

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Net;
 5 using System.Windows;
 6 using System.Windows.Controls;
 7 using System.Windows.Documents;
 8 using System.Windows.Input;
 9 using System.Windows.Media;
10 using System.Windows.Media.Animation;
11 using System.Windows.Shapes;
12 using Microsoft.Phone.Controls;
13 using Microsoft.Phone.Tasks;
14 using System.IO.IsolatedStorage;
15 
16 namespace shiyan3
17 {
18     public partial class MainPage : PhoneApplicationPage
19     {
20         public MainPage()
21         {
22             InitializeComponent();
23         }
24 
25         private void btnCreate_Click(object sender, RoutedEventArgs e)
26         {
27             // 通过GetUserStoreForApplication静态方法，可以返回一个IsolatedStorageFile实例。  
28             IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();
29             try
30             {
31                 if (iso.DirectoryExists(txtDirName.Text))    //如果隔离存储空间中已经有此名字，return
32                 {
33                     MessageBox.Show("已经有了");
34                     return;
35 
36                 }
37                 iso.CreateDirectory(this.txtDirName.Text);   //没有则创建
38             }
39             catch
40             { MessageBox.Show("Error !"); }
41         }
42 
43         private void btnCheck_Click(object sender, RoutedEventArgs e)
44         {
45             IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();
46             bool exists = iso.DirectoryExists(txtDirName.Text);
47             if (exists)
48             {
49                 this.tbDisplay.Text = "已存在";
50             }
51             else
52             {
53                 this.tbDisplay.Text = "不存在";
54             }
55         }
56 
57         private void btnDel_Click(object sender, RoutedEventArgs e)
58         {
59             IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();
60             try
61             {
62                 iso.DeleteDirectory(txtDirName.Text);
63             }
64             catch
65             {
66                 MessageBox.Show("Error !");
67             }
68         }  
69 
70 
71 
72     }
73 }

 

注意，要引入System.IO.IsolatedStorage命名空间。

界面展示：