一步一步学Silverlight ：数据与通信之ASMX

编写展示界面，XAML如下，与上一篇中的示例一样：

<Grid Background="#46461F">
    <Grid.RowDefinitions>
        <RowDefinition Height="40"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition></ColumnDefinition>
    </Grid.ColumnDefinitions>
    <Border Grid.Row="0" Grid.Column="0" CornerRadius="15"
        Width="240" Height="36" Background="Orange"
        Margin="20 0 0 0" HorizontalAlignment="Left">
        <TextBlock Text="最新随笔" Foreground="White"
               HorizontalAlignment="Left" VerticalAlignment="Center"
               Margin="20 0 0 0"></TextBlock>
    </Border>
    <ListBox x:Name="Posts" Grid.Row="1" Margin="40 10 10 10">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding Id}" Height="40" Foreground="Red"></TextBlock>
                    <TextBlock Text="{Binding Title}" Height="40"></TextBlock>
                    <TextBlock Text="{Binding Author}" Height="40" Foreground="Orange"></TextBlock>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</Grid>

实现调用ASMX，并进行数据的绑定。仍然采用异步模式，所使用的方法如上图中红色框中的部分。过程与WCF通信差不多，只不过不再需要指定Bingding等信息：

public partial class Page : UserControl
{
    public Page()
    {
        InitializeComponent();
    }

    private void UserControl_Loaded(object sender, RoutedEventArgs e)
    {
        BlogServiceSoapClient client = new BlogServiceSoapClient();
        client.GetPostsCompleted += new EventHandler<GetPostsCompletedEventArgs>(client_GetPostsCompleted);
        client.GetPostsAsync();
    }

    void client_GetPostsCompleted(object sender, GetPostsCompletedEventArgs e)
    {
        if (e.Error == null)
        {
            Posts.ItemsSource = e.Result;
        }
    }
}

一个完整的Silverlight 2中调用ASMX的示例就完成了，运行后效果如下：

结束语

本文简单介绍了在Silverlight 2中如何调用ASMX，你可以从这里下载示例代码。