c# - Windows Phone 8.1暂停

我有一个Windows Phone 8.1应用程序 - 我是Win Phone开发的新手！

它包含各种页面和自定义UserControl。

我正在尝试暂停该应用以访问文件系统/相机。

最初我收到错误是因为我在Frame.Navigate中传递了复杂的对象，但我通过将复杂对象添加到SuspensionManager.SessionState["..."]并在OnNavigatedTo函数中检索它来解决这个问题。

现在，我在应用程序暂停时收到的错误是：

键入＆＃39; Windows.UI.Xaml.UIElement＆＃39;无法序列化。请考虑使用DataContractAttribute属性对其进行标记，并使用DataMemberAttribute属性标记要序列化的所有成员。或者，您可以确保该类型是公共的并且具有无参数构造函数 - 然后将序列化该类型的所有公共成员，并且不需要任何属性。

我尝试按照建议操作 - 将[DataContract]属性添加到类中，并将[DataMember]添加到所有属性和字段中。

我仍然遇到同样的错误。谷歌并没有提供很多帮助，除了尝试上述内容，所以我通过每个自定义UserControl并将属性添加到那些 - 仍然没有工作，所以我也将属性添加到每个页面 - 主要是出于绝望。

所以现在一切都应该是可序列化的，但我仍然得到同样的错误！我怀疑它有用，但这是堆栈跟踪：

at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.ThrowInvalidDataContractException（String message，Type type）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContract（RuntimeTypeHandle typeHandle，Type type，SerializationMode mode）在System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper..ctor（Type type）在System.Runtime.Serialization.ClassDataContract..ctor（类型类型）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContract（RuntimeTypeHandle typeHandle，Type type，SerializationMode mode）在System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper..ctor（Type type）在System.Runtime.Serialization.ClassDataContract..ctor（类型类型）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContract（RuntimeTypeHandle typeHandle，Type type，SerializationMode mode）在System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper..ctor（Type type）在System.Runtime.Serialization.ClassDataContract..ctor（类型类型）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContract（RuntimeTypeHandle typeHandle，Type type，SerializationMode mode）在System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper..ctor（Type type）在System.Runtime.Serialization.ClassDataContract..ctor（类型类型）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type type）在System.Runtime.Serialization.DataContract.GetDataContract（RuntimeTypeHandle typeHandle，Type type，SerializationMode mode）在System.Runtime.Serialization.DataContract.CheckAndAdd（Type type，Dictionary 2 typesChecked, Dictionary 2＆amp; nameToDataContractTable）在System.Runtime.Serialization.XmlObjectSerializerContext.GetDataContractsForKnownTypes（IList`1 knownTypeList）在System.Runtime.Serialization.DataContractSerializer.get_KnownDataContracts（）在System.Runtime.Serialization.XmlObjectSerializerContext.get_SerializerKnownDataContracts（）在System.Runtime.Serialization.XmlObjectSerializerContext.GetDataContractFromSerializerKnownTypes（XmlQualifiedName qname） at System.Runtime.Serialization.XmlObjectSerializerContext.ResolveDataContractFromKnownTypes（String typeName，String typeNs，DataContract memberTypeContract）在System.Runtime.Serialization.XmlObjectSerializerContext.IsKnownType（DataContract dataContract，Type declaredType）在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeAndVerifyType（DataContract dataContract，XmlWriterDelegator xmlWriter，Object obj，Boolean verifyKnownType，RuntimeTypeHandle declaredTypeHandle，Type declaredType）在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithXsiType（XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle objectTypeHandle，Type objectType，Int32 declaredTypeID，RuntimeTypeHandle declaredTypeHandle，Type declaredType）在System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialize（XmlWriterDelegator xmlWriter，Object obj，Boolean isDeclaredType，Boolean writeXsiType，Int32 declaredTypeID，RuntimeTypeHandle declaredTypeHandle）在WriteKeyValueOfstringanyTypeToXml（XmlWriterDelegator，Object，XmlObjectSerializerWriteContext，ClassDataContract）在System.Runtime.Serialization.ClassDataContract.WriteXmlValue（XmlWriterDelegator xmlWriter，Object obj，XmlObjectSerializerWriteContext context）在WriteArrayOfKeyValueOfstringanyTypeToXml（XmlWriterDelegator，Object，XmlObjectSerializerWriteContext，CollectionDataContract）在System.Runtime.Serialization.CollectionDataContract.WriteXmlValue（XmlWriterDelegator xmlWriter，Object obj，XmlObjectSerializerWriteContext context）在System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue（DataContract dataContract，XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle declaredTypeHandle）在System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithoutXsiType（DataContract dataContract，XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle declaredTypeHandle）在System.Runtime.Serialization.DataContractSerializer.InternalWriteObjectContent（XmlWriterDelegator writer，Object graph，DataContractResolver dataContractResolver）在System.Runtime.Serialization.DataContractSerializer.InternalWriteObject（XmlWriterDelegator writer，Object graph，DataContractResolver dataContractResolver）在System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions（XmlWriterDelegator writer，Object graph，DataContractResolver dataContractResolver）在System.Runtime.Serialization.XmlObjectSerializer.WriteObject（XmlDictionaryWriter writer，Object graph）在System.Runtime.Serialization.XmlObjectSerializer.WriteObject（Stream stream，Object graph）在eAuditWindowsPhone.Common.SuspensionManager.d__0.MoveNext（）

我真的不确定下一步该尝试什么？我欢迎一些建议。

Windows Phone 8.1暂停

1 个答案: