我正在将一个Windows Phone 8应用移植到Windows 8.1,并希望使用ApplicationData.Current.LocalSettings来存储/持久化一些数据。除了一些字符串/布尔/整数值,我还想存储一个(非常简单的)自定义类。
[DataContract]
public class MyClass {
[DataMember]
public double Property1;
[DataMember]
public int Property2;
[DataMember]
public int Property3;
[DataMember]
public bool Property4;
public int Total{
get { return Property2 + Property 3; }
}
}
}
在WP 8中,我使用IsolatedStorageSettings.ApplicationSettings来存储设置,没有任何问题。即使我不使用DataContract/DataMember,它也可以正常工作:
MyClass mySettings = new MyClass();
mySettings.Property2 = 1;
mySettings.Property2 = 2;
IsolatedStorageSettings.ApplicationSettings["mySettings"] = mySettings;
IsolatedStorageSettings.ApplicationSettings.Save();
MyClass loadedSettings = IsolatedStorageSettings.ApplicationSettings["mySettings"];
Debug.WriteLine(loadedSettings.Total); // == 3
在Win 8.1上使用以下代码会导致序列化异常:
...
ApplicationData.Current.LocalSettings.Values["mySettings"] = mySettings;
Error trying to serialize the value to be written to the application data store
at System.Runtime.InteropServices.WindowsRuntime.IMap`2.Insert(K key, V value)
at System.Runtime.InteropServices.WindowsRuntime.MapToDictionaryAdapter.Insert[K,V](IMap`2 _this, K key, V value)
at System.Runtime.InteropServices.WindowsRuntime.MapToDictionaryAdapter.Indexer_Set[K,V](K key, V value)
我发现使用DataContract/DataMember的提示,但这并没有改变什么。有什么解决办法吗?