WPF: Data Source Providers (XML)

Bài viết này trình bày cách thực hiện binding XML data trong WPF.

Trước hết chúng ta có một XML file: Hyperlogy.xml

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

<Company xmlns="http://www.hyperlogy.com">

  <Person FirstName="Duc" LastName="Le" />

  <Person FirstName="Quang" LastName="Nguyen" />

  <Person FirstName="Nhat" LastName="Mai" />

</Company>

Chúng ta thực hiện Binding XML file thông quan XAML code như sau:

- Sử dụng XmlDataProvider để khai báo XML Binding

- Source: chỉ ra xml source file

- XPath: chỉ ra collection element cần binding

<Window.Resources>

        <XmlDataProvider

            x:Key="Hyperlogy"

            Source="Hyperlogy.xml"

            XPath="/hy:Company/hy:Person">

                <XmlDataProvider.XmlNamespaceManager>

                <XmlNamespaceMappingCollection>

                    <XmlNamespaceMapping Uri="http://www.hyperlogy.com" Prefix="hy" />

                </XmlNamespaceMappingCollection>

                </XmlDataProvider.XmlNamespaceManager>

            </XmlDataProvider>

    </Window.Resources>

 

Sử dụng {Binding XPath=@FirstName} để binding tới các node của XML

Fullcode

<Window x:Class="XMLBinding.Window1"

   ...

    <Window.Resources>

        <XmlDataProvider

            x:Key="Hyperlogy"

            Source="Hyperlogy.xml"

            XPath="/hy:Company/hy:Person">

                <XmlDataProvider.XmlNamespaceManager>

                <XmlNamespaceMappingCollection>

                    <XmlNamespaceMapping Uri="http://www.hyperlogy.com" Prefix="hy" />

                </XmlNamespaceMappingCollection>

                </XmlDataProvider.XmlNamespaceManager>

            </XmlDataProvider>

    </Window.Resources>

    <Grid Margin="10" Name="grid" DataContext="{StaticResource Hyperlogy}">

       ...

        <ListBox Grid.Column="1" Grid.Row="0" Name="lbPeople" 

                 ItemsSource="{Binding}" 

                 IsSynchronizedWithCurrentItem="True">

            <ListBox.ItemTemplate>

                <DataTemplate>

                    <TextBlock>

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

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

                    </TextBlock>

                </DataTemplate>

            </ListBox.ItemTemplate>

        </ListBox>

        <TextBox Grid.Column="1" Grid.Row="2" Name="txtFirstName" Text="{Binding XPath=@FirstName}" />

        <TextBox Grid.Column="1" Grid.Row="4" Name="txtLastName" Text="{Binding XPath=@LastName}"/>

        ...

    </Grid>

</Window>