public static async Task SaveFileAsync(string FileName, T data)
{
MemoryStream memStream = new MemoryStream();
DataContractSerializer serializer = new DataContractSerializer(typeof(T));
serializer.WriteObject(memStream, data);
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(FileName,
CreationCollisionOption.ReplaceExisting);
using (Stream stream = await file.OpenStreamForWriteAsync())
{
memStream.Seek(0, SeekOrigin.Begin);
await memStream.CopyToAsync(stream);
await stream.FlushAsync();
}
}
public static async Task<T> RestoreFileAsync(string FileName)
{
T result = default(T);
try
{
StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync(FileName);
using (IInputStream inStream = await file.OpenSequentialReadAsync())
{
DataContractSerializer serializer = new DataContractSerializer(typeof(T));
result = (T)serializer.ReadObject(inStream.AsStreamForRead());
return result;
}
}
catch (FileNotFoundException)
{
return default(T);
}
}
我正在使用这些方法来序列化我的数据,但我有一个包含图像的类,
[DataMember]
Public Image img{get;set;}
我正在尝试序列化它。我实际上正在执行以下操作
var thumb = await item.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode.PicturesView,
1000, Windows.Storage.FileProperties.ThumbnailOptions.UseCurrentScale);
BitmapImage bmg = new BitmapImage();
bmg.SetSource(thumb);
Image img = new Image();
img.Source = bmg;
我试图序列化它自己的bitmapImage,但这是同样的问题。我不断收到此错误,并且我的 BitmapImage 有一个属性。
无法序列化类型“Windows.UI.Xaml.Media.ImageSource”。考虑使用 DataContractAttribute 属性对其进行标记,并使用 DataMemberAttribute 属性标记您想要序列化的所有成员。如果该类型是一个集合,请考虑使用 CollectionDataContractAttribute 对其进行标记。有关其他支持的类型,请参阅 Microsoft .NET Framework 文档。