我正在尝试ObservableCollection
在 windows phone (Windows.Storage) 中使用新方法保存一个。我有以下类,它是我要保存的可观察集合的基础:
[DataContract]
class SettingsModel : INotifyPropertyChanged
{
public SettingsModel()
{ }
[DataMember]
private string _TargetIP {get; set;}
public string TargetIP
{
get
{
return _TargetIP;
}
set
{
_TargetIP = value;
NotifyPropertyChanged("TargetIP");
}
}
[DataMember]
private string _TargetADS { get; set; }
public string TargetADS
{
get
{
return _TargetADS;
}
set
{
_TargetADS = value;
NotifyPropertyChanged("TargetADS");
}
}
[DataMember]
private string _ClientIP { get; set; }
public string ClientIP
{
get
{
return _ClientIP;
}
set
{
_ClientIP = value;
NotifyPropertyChanged("ClientIP");
}
}
[DataMember]
private string _ClientADS { get; set; }
public string ClientADS
{
get
{
return _ClientADS;
}
set
{
_ClientADS = value;
NotifyPropertyChanged("ClientADS");
}
}
#region Notify property changed
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string propertyName)
{
if (this.PropertyChanged != null)
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
}
我保存可观察集合的代码是这样的:
public static async void SaveCollection<T>(string FileName, string FileExtension, ObservableCollection<T> Col) where T : class
{
// place file extension
FileName = FileName + "." + FileExtension;
// creating the file and replace the current file if the file allready exists
var file = await Windows.Storage.ApplicationData.Current.LocalFolder.CreateFileAsync
(FileName,
Windows.Storage.CreationCollisionOption.ReplaceExisting);
// openup a new stream to the file (write)
using (var Stream = await file.OpenStreamForWriteAsync())
{
// serialize the observable collection to a writable type
var DataSerializer = new DataContractSerializer(typeof(ObservableCollection<T>),
new Type[] { typeof(T) });
// write data
DataSerializer.WriteObject(Stream, Col);
}
}
静态SaveCollection<t>
方法的调用:
StorageHandler.SaveCollection<SettingsModel>("TestData", "txt", Data);
其中 Data 是基于settingsModel
. 该调用在方法的最后一行给了我一个错误SaveCollection
。数据序列化器的错误:
System.Runtime.Serialization.ni.dll 中出现“System.Security.SecurityException”类型的异常,但未在用户代码中处理
附加信息:无法反序列化集合数据合同类型“System.Collections.ObjectModel.ObservableCollection`1[[WP_ADS.Model.SettingsModel, WP_ADS, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]”,因为它确实可以反序列化没有公共无参数构造函数。添加公共无参数构造函数将修复此错误。或者,您可以将其设为内部,并在程序集上使用 InternalsVisibleToAttribute 属性以启用内部成员的序列化 - 有关更多详细信息,请参阅文档。请注意,这样做有一定的安全隐患。
知道如何解决这个问题吗?
(正如错误所暗示的,我已经尝试添加一个无参数构造函数,使构造函数成为内部但都无济于事)。