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Windows Phone 7 独立存储使用XML文件来存储信息

2012年11月29日 ⁄ 综合 ⁄ 共 11460字 ⁄ 字号 小 中 大 ⁄ 评论关闭

 XML结构清晰，使用手机独立存储的时候可以利用上XML的文件结构来保存信息，这是一种不错的选择。

使用IsolatedStorageFile对象来实现手机信息的存储，有三个主要步骤，

1、调用手机的独立存储

IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication()

2、创建独立存储文件流

IsolatedStorageFileStream location = new IsolatedStorageFileStream(nameTxt.Text + ".item", System.IO.FileMode.Create, storage);

3、读写该文件流

写：

//将本地存储文件流转化为可写流
 System.IO.StreamWriter file = new System.IO.StreamWriter(location);
 //将XML文件 保存到流file上 即已经写入到手机本地存储文件上
_doc.Save(file);   //_doc是你创建的文件

读：

//转化为可读流
System.IO.StreamReader file = new System.IO.StreamReader(location);
//解析流 转化为XML
_xml = XElement.Parse(file.ReadToEnd());

下面是一个Demo购物清单

清单列表

MainPage.xaml

View Code 

<phone:PhoneApplicationPage 
x:Class="ShoppingList_Demo.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"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="696"
    shell:SystemTray.IsVisible="True">


<phone:PhoneApplicationPage.ApplicationBar>
<shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
<shell:ApplicationBar.MenuItems>
<shell:ApplicationBarMenuItem Text="新增" Click="New_Click"/>
</shell:ApplicationBar.MenuItems>
</shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>


<!--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="24,24,0,12">
<TextBlock x:Name="PageTitle" Text="购物清单" Margin="-3,-8,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>

<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentGrid" Grid.Row="1">
<ListBox Grid.Row="0" Margin="10" FontSize="48" Name="Files">
</ListBox>
</Grid>
</Grid>


</phone:PhoneApplicationPage>
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.IsolatedStorage;
using System.Xml.Linq;

namespace ShoppingList_Demo
{
public partial class MainPage : PhoneApplicationPage
    {
public MainPage()
        {
            InitializeComponent();
//加载页面触发Loaded事件
            Loaded += (object sender, RoutedEventArgs e) =>
            {
                Files.Items.Clear();//先清空一下ListBox的数据
//获取应用程序的本地存储文件
                using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
                {
//获取并循环 *.item的存储文件
                    foreach (string filename in storage.GetFileNames("*.item"))
                    {
//动态构建一个Grid
                        Grid a = new Grid();
//定义第一列
                        ColumnDefinition col = new ColumnDefinition();
                        GridLength gl = new GridLength(200);
                        col.Width = gl;
                        a.ColumnDefinitions.Add(col);
//定义第二列
                        ColumnDefinition col2 = new ColumnDefinition();
                        GridLength gl2 = new GridLength(200);
                        col2.Width = gl;
                        a.ColumnDefinitions.Add(col2);
//添加一个TextBlock现实文件名 到第一列
                        TextBlock txbx = new TextBlock();
                        txbx.Text = filename;
                        Grid.SetColumn(txbx, 0);
//添加一个HyperlinkButton链接到购物详细清单页面 这是第二列
                        HyperlinkButton btn = new HyperlinkButton();
                        btn.Width = 200;
                        btn.Content = "查看详细";
                        btn.Name = filename;
                        btn.NavigateUri = new Uri("/DisplayPage.xaml?item=" + filename, UriKind.Relative);//传递文件名到商品详细页面

                        Grid.SetColumn(btn, 1);

                        a.Children.Add(txbx);
                        a.Children.Add(btn);

                        Files.Items.Add(a);
                    }
                }
            };

        }
private void New_Click(object sender, EventArgs e)
        {
            NavigationService.Navigate(new Uri("/AddItem.xaml", UriKind.Relative));
        }
    }
}

AddItem.xaml

View Code 

<phone:PhoneApplicationPage 
x:Class="ShoppingList_Demo.AddItem"
    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"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

<!--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="24,24,0,12">
<TextBlock x:Name="PageTitle" Text="添加商品" Margin="-3,-8,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>

<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentGrid" Grid.Row="1">
<Grid.RowDefinitions>
<RowDefinition Height="90" MinHeight="72.5"/>
<RowDefinition Height="90" MinHeight="72.5"/>
<RowDefinition Height="90" MinHeight="72.5"/>
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100*" />
<ColumnDefinition Width="346*"/>
</Grid.ColumnDefinitions>

<TextBlock Grid.Column="0" Grid.Row="0" Text="名称:" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBox Name="nameTxt"  Grid.Column="1" Margin="8,8,8,0" Padding="2" />

<TextBlock Grid.Column="0" Grid.Row="1" Text="价格:"  HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBox x:Name="priceTxt"  Grid.Column="1" Margin="8,8,8,0" Padding="2" Grid.Row="1"  />

<TextBlock Grid.Column="0" Grid.Row="2" Text="数量:" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBox Name="quanTxt" Grid.Column="1" Margin="8,8,8,375" Padding="2" Grid.Row="2" Grid.RowSpan="2" />

</Grid>
<Button x:Name="BtnSave" Content="保存" HorizontalAlignment="Right" Margin="0,0,17,0" Grid.Row="1" VerticalAlignment="Bottom" Click="BtnSave_Click" />


</Grid>

</phone:PhoneApplicationPage>
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.IsolatedStorage;
using System.Xml.Linq;

namespace ShoppingList_Demo
{
public partial class AddItem : PhoneApplicationPage
    {
public AddItem()
        {
            InitializeComponent();
        }

private void BtnSave_Click(object sender, RoutedEventArgs e)
        {
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
            {
                XDocument _doc = new XDocument();

                XElement _item = new XElement(nameTxt.Text);//创建一个XML元素
                XAttribute price = new XAttribute("price", priceTxt.Text);//创建一个XML属性
                XAttribute quantity = new XAttribute("quantity", quanTxt.Text);

                _item.Add(price, quantity);//将这两个属性添加到 XML元素上
//用_item 新建一个XML的Linq文档 
                _doc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"), _item);

//创建一个本地存储的文件流
                IsolatedStorageFileStream location = new IsolatedStorageFileStream(nameTxt.Text + ".item",
                        System.IO.FileMode.Create, storage);
//将本地存储文件流转化为可写流
                System.IO.StreamWriter file = new System.IO.StreamWriter(location);
//将XML文件 保存到流file上 即已经写入到手机本地存储文件上
                _doc.Save(file);

                file.Dispose();//关闭可写流
                location.Dispose();//关闭手机本地存储流
//调回清单主页
                NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
            }
        }
    }
}

查看商品详细

DisplayPage.xaml

View Code 

<phone:PhoneApplicationPage 
x:Class="ShoppingList_Demo.DisplayPage"
    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"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

<!--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="24,24,0,12">
<TextBlock x:Name="PageTitle" Text="商品信息" Margin="-3,-8,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>

<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentGrid" Grid.Row="1" Grid.Column="2" HorizontalAlignment="Center" Margin="10,10,10,77" ShowGridLines="True" Width="446" d:LayoutOverrides="GridBox">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" MinHeight="72.5"/>
<RowDefinition Height="Auto" MinHeight="72.5"/>
<RowDefinition Height="Auto" MinHeight="72.5"/>
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.3*" />
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>

<TextBlock Grid.Column="0" Grid.Row="0" Text="名称:" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBlock Name="nameTxt"  Grid.Column="1" Margin="8" Padding="2" Height="59"  />

<TextBlock Grid.Row="1" Text="价格:" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBlock x:Name="priceTxt"  Grid.Column="1" Margin="8" Padding="2" Height="59" Grid.Row="1"  />

<TextBlock Grid.Column="0" Grid.Row="2" Text="数量:" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBlock Name="quanTxt" Grid.Column="1" Margin="8" Padding="2" Height="59" Grid.Row="2" />

</Grid>
<Button x:Name="BtnBack" Content="回到购物清单" HorizontalAlignment="Right" Margin="0,0,17,0" Grid.Row="1" VerticalAlignment="Bottom" Click="BtnBack_Click" />

</Grid>

</phone:PhoneApplicationPage>
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.IsolatedStorage;
using System.Xml.Linq;
using System.Windows.Navigation;

namespace ShoppingList_Demo
{
public partial class DisplayPage : PhoneApplicationPage
    {

public DisplayPage()
        {
            InitializeComponent();
        }

protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            String itemName = "";

base.OnNavigatedTo(e);
//获取上一页面传递过来的item值
            bool itemExists = NavigationContext.QueryString.TryGetValue("item", out itemName);

if (itemExists)
            {
                PageTitle.Text = itemName;
            }

using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
            {
                XElement _xml;//定义Linq的XML元素
//打开本地存储文件
                IsolatedStorageFileStream location = new IsolatedStorageFileStream(itemName, System.IO.FileMode.Open, storage);
//转化为可读流
                System.IO.StreamReader file = new System.IO.StreamReader(location);
//解析流 转化为XML
                _xml = XElement.Parse(file.ReadToEnd());

if (_xml.Name.LocalName != null)
                {
                    XAttribute priceTemp = _xml.Attribute("price");//获取价格
                    priceTxt.Text = priceTemp.Value.ToLower();
                    XAttribute quanTemp = _xml.Attribute("quantity");//获取数量
                    quanTxt.Text = quanTemp.Value.ToLower();
                    nameTxt.Text = itemName;
                }

                file.Dispose();
                location.Dispose();
            }
        }

private void BtnBack_Click(object sender, RoutedEventArgs e)
        {
            NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
        }
    }
}
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