WP7的XML操作详解(转)

WP7 xml操作

在这个小教程，我将演示在Windows Phone 7如何让ListBox的数据绑定XML数据。我将使用LINQ to XML，以便加载和读取数据，而且我将展示如何实现一个基本的过滤。 首先让我们先创建一个Windows Phone 7的应用程序项目示例，并添加以下两个demo xml文件。 people.xml

<?xml version="1.0" encoding="utf-8" ?>

<people>

<person>

<firstname>Kate</firstname>

<lastname>Smith</lastname>

<age>27</age>

</person>

<person>

<firstname>Tom</firstname>

<lastname>Brown</lastname>

<age>30</age>

</person>

<person>

<firstname>Tim</firstname>

<lastname>Stone</lastname>

<age>36</age>

</person>

<person>

<firstname>Ann</firstname>

<lastname>Peterson</lastname>

<age>27</age>

</person>

</people>

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PeopleCustom.xml

<?xml version="1.0" ?>

<People>

<Person

FirstName="Kate"

LastName="Smith"

Age="27" />

<Person

FirstName="Tom"

LastName="Brown"

Age="30" />

<Person

FirstName="Tim"

LastName="Stone"

Age="36" />

<Person

FirstName="Ann"

LastName="Peterson"

Age="27" />

</People>

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下一步是创建一个示例类将被用来存储XML元素值：

public class Person

{

string firstname;

string lastname;

int age;

public string FirstName

{

get { return firstname; }

set { firstname = value; }

}

public string LastName

{

get { return lastname; }

set { lastname = value; }

}

public int Age

{

get { return age; }

set { age = value; }

}

}

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您所在的用户组无法下载或查看附件为了读取XML文件的信息，我们将使用的XDocument 所以你首先需要添加System.Xml.Linq.dll引用，然后using System.Xml.Linq;

XDocument loadedData = XDocument.Load("People.xml");

var data = from query in loadedData.Descendants("person")

select new Person

{

FirstName = (string)query.Element("firstname"),

LastName = (string)query.Element("lastname"),

Age = (int)query.Element("age")

};

listBox.ItemsSource = data;

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在接下来的例子中，我们将通过数据的“年龄”属性值过滤。源代码如下：

XDocument loadedCustomData = XDocument.Load("PeopleCustom.xml");

var filteredData = from c in loadedCustomData.Descendants("Person")

where c.Attribute("Age").Value == "27"

select new Person()

{

FirstName = c.Attribute("FirstName").Value,

LastName = c.Attribute("LastName").Value

};

listBox1.ItemsSource = filteredData;

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为了显示的数据，我们将使用以下ItemTemplates绑定ListBox控件：

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

<TextBlock Text="XML Data:"/>

<ListBox x:Name="listBox">

<ListBox.ItemTemplate>

<DataTemplate>

<StackPanel Margin="10" >

<TextBlock Text="{Binding FirstName}"/>

<TextBlock Text="{Binding LastName}"/>

<TextBlock Text="{Binding Age}"/>

</StackPanel>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

<TextBlock Text="Filtered by Age 27:"/>

<ListBox x:Name="listBox1">

<ListBox.ItemTemplate>

<DataTemplate>

<StackPanel Margin="20" >

<TextBlock Text="{Binding FirstName}"/>

<TextBlock Text="{Binding LastName}"/>

</StackPanel>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

</StackPanel>

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