Detailed description of WP7 XML operations: Reading, filtering, and Data Binding

In this tutorial, I will demonstrate how to bind ListBox data to XML data on Windows Phone 7. I will use LINQ to XML to load and read data, and I will demonstrate how to implement a basic filter.

First, let's create a Windows Phone 7 Application project example and add the following two demo xml files.

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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Lelecustom. 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>

The next step is to create an example class to store XML element values:

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; }
    }
}

To read the XML file information, we will use the XDocument

So you need to addSystem. Xml. Linq. dllReference, and then usingSystem. 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;

In the following example, we will use the "Age" attribute value of the dataFilter. The source code is as follows:

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;

To display the data, we will use the following ItemTemplates to bind the ListBox control:

<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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Please slam the source code