使用DataContractSerializer在Isolatedstorage中存储数据

我正在使用带有图像和文本块的ListBox的Windows phone应用程序 . 这里的图像位于应用程序的 IsolatedStorage 中 . 要在 ListBlock 中显示图像，我正在转换为流 . 在此之后我使用 DataContractSerializer 在Isolatedstorage中序列化和存储 .

第1页中的代码：

public BookDataList listobj = new BookDataList();

public class BookDataList : List<BookData>//for storing BookData class items with type of list
{
}  

    [DataContract]
public class BookData
{
    [DataMember]
    public BitmapImage ImageBinary
    {
        get { return m_ImageBinary; }
        set { m_ImageBinary = value; }
    }

    [DataMember]
    public BitmapImage m_ImageBinary;

    public BookData(string strImageName)
    {
        //*** Image Binary ***'
        BitmapImage image = new BitmapImage();
        IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication();
        string isoFilename = strImageName;
        Stream stream = isoStore.OpenFile(isoFilename, System.IO.FileMode.Open);
        image.SetSource(stream);
        this.ImageBinary = image;
        stream.Close();
    }

    [DataMember]
    public string BookName { get; set; }

    [DataMember]
    public string BookPath { get; set; }

    [DataMember]
    public string FolderPath { get; set; }
}

这里我要添加列表数据类型的项目：

listobj.Add(new BookData(CoverImageForLib) { BookName = MyTitle.Value,  
BookPath = item.Path, FolderPath = split[1] });

这里我将存储到隔离存储中的文件：

if (Settings1.FileExists("MyStoreItems"))
  {
      Settings1.DeleteFile("MyStoreItems");
  }
  using (IsolatedStorageFileStream fileStream = Settings1.OpenFile("MyStoreItems", FileMode.Create))
  {
      DataContractSerializer serializer = new DataContractSerializer(typeof(BookDataList));
      serializer.WriteObject(fileStream, listobj);
  }
  NavigationService.Navigate(new Uri("/Library.xaml", UriKind.Relative));

在这里，我只是存储值 . 我将从我的文件 MyStoreItems 反序列化 /Library.xaml 中的值

Edit:

我从here获得了相关的东西

您的“BookData”类没有公共无参数构造函数 . 尝试重新加载数据时，这将导致错误 . BitmapImage类不可序列化 . 为了解决这两个问题，您需要编写自定义序列化代码，您可以通过向您的类添加接口：“IXmlSerializable”并实现GetSchema，ReadXml和WriteXml方法来完成 .

序列化 listobj 时，我收到 System.Reflection.TargetInvocationException 异常 .

如果代码令人困惑，请向我提问，以便我澄清 .

Edit 1:

[DataContract]
public class BookData
{
    [DataMember]
    public string BookName { get; set; }
    [DataMember]
    public string Creator { get; set; }
    [DataMember]
    public string BookPath { get; set; }
    [DataMember]
    public string BookCoverPath { get; set; }
    [DataMember]
    public string FolderPath { get; set; }
    [DataMember]
    public BitmapImage Image { get; set; }
}

public class BookDataList : List<BookData>//for storing BookData class items with type of list
{

}

我将 BookCoverPath 序列化并存储为字符串 . 但每当我试图反序列化时，它都会给出异常 . 我不熟悉 DataContractSerializer . 你能看一下我做错了吗？

// Here I getting data from file in Isolated storage
    if (Settings1.FileExists("MyStoreItems"))
        {
            using (IsolatedStorageFileStream fileStream = Settings1.OpenFile("MyStoreItems", FileMode.Open))
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(BookData));
                listobj1 = (BookDataList)serializer.ReadObject(fileStream);
            }
        }
    foreach (var item in listobj1)
    {
        string imagePath = item.BookCoverPath;
        item.Image = BookData(imagePath);
    }
    ListBox.ItemsSource = listobj1;//binding isolated storage list data

    public BitmapImage BookData(string imagePath)
    {
        //*** Image Binary ***'
        BitmapImage image = new BitmapImage();
        IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication();
        string isoFilename = imagePath;
        Stream stream = isoStore.OpenFile(isoFilename, System.IO.FileMode.Open);
        image.SetSource(stream);
        stream.Close();

        return image;
    }