如何在Windows Phone 7中显示Json数据

Question

我是Windows手机的初学者,我不知道如何从JSON字符串填充列表框.在我的应用程序中,将有一个来自Web服务的Json String.

所以,这是我的json String [json Array]:

{
"type":"ok",
"result":
       {
       "Country":[{
                    "title":"Country-1",
                    "description":"US",
                    "status":"1"
                  },
                  {
                    "title":"Country-2",
                    "description":"Australia",
                    "status":"0"
                   },
                   {
                    "title":"Country-3",
                    "description":"Brazil,
                    "status":"0"
                  }      
                 ]
        }
}

我想在我的应用程序中的列表框中绑定它.我真的不知道,如何在列表框中绑定.

请给我完整的xaml和c#代码.

Answer 1

首先,你需要一个好的库来帮助你将你的json字符串转换成你的c#模型表示(DeSerialization).

您可以编写自己的,使用内置平台反序列化器或只使用NewtonSoft.json

要安装NewtonSoft for WP,请使用Nuget.请注意,您必须使用版本5.0.8,因为6.x系列不支持Windows Phone 7.

我已经简化了你的json字符串,不明白为什么一个国家财产会有一个国家列表？

c#,在你的代码背后

public partial class MainPage : PhoneApplicationPage
{
    // Constructor
    public MainPage()
    {
        InitializeComponent();

        //BindCountries();
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        BindCountries();
    }

    private void BindCountries()
    {
        var json =
            "{\"type\":\"ok\",\"countries\":[{\"title\":\"Country-1\",\"description\":\"US\",\"status\":\"1\"},{\"title\":\"Country-2\",\"description\":\"Australia\",\"status\":\"0\"},{\"title\":\"Country-3\",\"description\":\"Brazil\",\"status\":\"0\"}]}";

        var countryResult = JsonConvert.DeserializeObject<CountryResult>(json);

        if (countryResult.Type.Equals("ok", StringComparison.InvariantCultureIgnoreCase))
        {
            lstCountries.ItemsSource = countryResult.Countries;
        }

    }
}

public class CountryResult
{
    public string Type { get; set; }
    public IEnumerable<Country> Countries { get; set; }
}

public class Country
{
    public string Title { get; set; }
    public string Description { get; set; }
    public int Status { get; set; }
}

XAML:

<phone:PhoneApplicationPage 
x:Class="PhoneApp1.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">

<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>

    <!--TitlePanel contains the name of the application and page title-->
    <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
        <TextBlock x:Name="ApplicationTitle" Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}"/>
        <TextBlock x:Name="PageTitle" Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
    </StackPanel>

    <!--ContentPanel - place additional content here-->
    <Grid  x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
        <ListBox x:Name="lstCountries">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock FontSize="{StaticResource PhoneFontSizeExtraLarge}" Text="{Binding Title}" />
                        <TextBlock Text="{Binding Description}" />
                    </StackPanel>

                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

    </Grid>
</Grid>

结果: