Xamarin表单视图不使用自定义类更新

我正在使用Prism.Unity.Forms和Xamarin来完成这个项目。当

Client.Id

属性更改时，如何获取要更新的视图？当我将XAML从

{Binding Client.Id}

（Guid对象）更改为

{Binding Client.Name}

（字符串）时，视图将更新

这很有效

<Entry Text="{Binding Client.Name}"/>

---

使用

转换器

解决了这个问题，但我无法解释原因。正在以任何方式调用

Guid.ToString

方法

然后我在

App.xaml

<ResourceDictionary>
    <viewHelpers:GuidConverter x:Key="GuidConverter" />
</ResourceDictionary>

---

使用

转换器

修复了问题，但我无法解释原因。正在以任何方式调用

Guid.ToString

方法

然后我在

App.xaml

<ResourceDictionary>
    <viewHelpers:GuidConverter x:Key="GuidConverter" />
</ResourceDictionary>

确保您的客户端实现INotifyPropertyChanged确保您的客户端实现INotifyPropertyChanged

public class CreateClientViewModel : BindableBase
{
    private Client _client;
    public Client Client {
        get => _client;
        set => SetProperty(ref _client, value);
    }

    //This method will eventually make an API call.
    private async void FetchNewClient()
    {
        Client = new Client{
            Id = new ClientId{
                Id = new Guid.Parse("501f1302-3a45-4138-bdb7-05c01cd9fe71")
            },
            Name = "MyClientName"
        };
    }
}

public class ClientId
{
    public Guid Id { get; set }

    public override string ToString()
    {
        //This method gets called
        Console.WriteLine("I GET CALLED");
        return Id.ToString();
    }
}

public class GuidConverter : IValueConverter
{
    public object Convert()
    {
        var guid = (Guid) value;
        return guid.ToString();
    }

    public object ConvertBack(){...}
}

<ResourceDictionary>
    <viewHelpers:GuidConverter x:Key="GuidConverter" />
</ResourceDictionary>