在這個小教程，我將演示在Windows Phone 7如何讓ListBox的數(shù)據(jù)綁定XML數(shù)據(jù)。我將使用LINQ to XML，以便加載和讀取數(shù)據(jù)，而且我將展示如何實(shí)現(xiàn)一個基本的過濾。
首先讓我們先創(chuàng)建一個Windows Phone 7的應(yīng)用程序項(xiàng)目示例，并添加以下兩個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>
在這里我不得不感謝一直支持我的鹵面網(wǎng)版主，是他讓我提起興趣寫了這么一篇文章，再次感謝鹵面網(wǎng)，一個非常不錯的wp7開發(fā)論壇,后面我也將再次向大家發(fā)布幾篇高質(zhì)量文章，請大家到鹵面上找我吧，呵呵
進(jìn)入正題：
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>下一步是創(chuàng)建一個示例類將被用來存儲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; }
}
}
為了讀取XML文件的信息，我們將使用的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;在接下來的例子中，我們將通過數(shù)據(jù)的“年齡”屬性值過濾。源代碼如下：
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;為了顯示的數(shù)據(jù)，我們將使用以下ItemTemplates綁定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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