Xamarin TodoASMX示例项目的副本无法构建

Question

我在尝试获取要构建的TodoASMX解决方案时遇到问题。

具体来说，我在PCL中遇到了List Page（xaml）的问题。我已经包含了屏幕截图，因此您可以看到xaml和相应的cs文件。

我的XAML ......

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="Core.Views.TeamMemberListPage">  
<ContentPage.Content>
    <ListView x:Name="listView">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <StackLayout Padding="20,0,0,0" HorizontalOptions="StartAndExpand" Orientation="Horizontal">
                        <Label Text="{Binding Name}" VerticalTextAlignment="Center" />
                        <Image Source="check.png" IsVisible="{Binding Done}" />
                    </StackLayout>
                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</ContentPage.Content>
</ContentPage>

我的XAML代码隐藏......

using Xamarin.Forms;

namespace GreystarApps.Core.Views
{
public partial class TeamMemberListPage : ContentPage
{
    bool alertShown = false;

    public TeamMemberListPage()
    {
        InitializeComponent ();
    }

    protected async override void OnAppearing()
    {
        base.OnAppearing();

        if (Constants.SoapUrl.Contains("developer.xamarin.com"))
        {
            if (!alertShown)
            {
                await DisplayAlert(
                    "Hosted Back-End",
                    "This app is running against Xamarin's read-only ASMX service. To create, edit, and delete data you must update the service endpoint to point to your own hosted ASMX service.",
                    "OK");
                alertShown = true;
            }
        }

        listView.ItemsSource = await App.tmManager.GetTeamMembersAsync();
    }
}
}

只需在VS中查看“InitializeComponent（）”和“listView.ItemSource ...”行标有下划线并在设计时显示为错误，但它们在我从GitHub下载的原始TodoASMX解决方案中也显示为错误。然而，TodoASMX解决方案实际上是建立的，而我的解决方案没有。