Windows phone 8.1 用于.NET的Facebook SDK的“LoginButton控件”示例不显示GraphUser对象

我正在尝试学习使用FacebookSDK for.NET。专门针对Windows Phone 8.1通用应用程序，而非Silverlight。为此，我构建了“LoginButton控件”示例，可在此处找到： 我已经成功地用这个示例登录到Facebook，但是新的“名称”出现了。它与本部分代码相关：

        <!--user information-->
        <StackPanel HorizontalAlignment="Right">
            <TextBlock 
                HorizontalAlignment="Center"
                Text="{Binding CurrentUser.Name, ElementName=loginButton}" />
        </StackPanel>

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

“CurrentUser.x”似乎无法检索ID、名称等其他数据。为了进一步测试，我添加了“ProfilePicture控件”示例。结果表明，配置文件图片显示良好，但无法显示所有其他GraphUser对象

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

我使用的是Visual Studio 2013、Facebook 6.8.0、Facebook.Client 1.0.2

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

有人解释为什么此示例不允许访问GraphUser对象吗

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

---

向您致以最诚挚的问候

您并不孤单！！我和你有同样的问题，但是我花了6个小时才把它解决了。Nuget Facebook SDK的文档似乎已经过时，而且编写得不正确。这对我帮助很大

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

这是我使用的Xaml`

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

`

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

这里是Xaml.Cs

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>

包括所有必要的名称空间。

---

这段代码写得不整齐。这是为了测试。谢谢。

您能提供更多关于过时零件的信息吗？在我的例子中，SessionStateChanged使用Openin调用，并关闭，但在使用LoginButton重定向到登录页面后从未打开。完成配置和登录按钮教程之后。

<TextBlock x:Name="Ganesh" Grid.Row="0" 
    FontSize="72" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    Text="Welcome" 
    Foreground="Red"
    Visibility="Collapsed"/>

<facebookControls:LoginButton 
    x:Name="loginButton" 
    Grid.Row="2" 
    HorizontalAlignment="Center" 
    VerticalAlignment="Center" 
    SessionStateChanged="loginButton_SessionStateChanged"/>

<facebookControls:ProfilePicture 
    x:Name="profilePicture"
    Width="50" 
    Height="50" 
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    CropMode="Original" 
    Grid.Row="3"/>

<TextBlock x:Name="userInfo"
    VerticalAlignment="Center"
    HorizontalAlignment="Center"
    TextWrapping="Wrap"
    Text=""
    FontSize="20"
    Grid.Row="1" 
    Foreground="#FF8B2020"
    Visibility="Collapsed"/>