Question

我正在深入研究Windows Phone开发，并开始接受WP上Silverlight的一些功能，但我正在努力使用XML：

我正在尝试将一些对象序列化为XML，然后读取所述XML并将其序列化为对象。然后，我将使用ObservableCollection作为列表框的ItemsSource来填充列表框。

我已经确保数据绑定工作正常;如果我只生成对象并将它们放入Observable Collection然后将其作为ItemsSource放置，则没有问题。似乎我的代码的XML部分是错误的。所有内容都编译并执行得足够好，但列表框仍为空:(

此代码在应用程序启动时执行（效果不是很好但适用于我的测试）：

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
    {
        ObservableCollection<Quote> quotes = new ObservableCollection<Quote>();
        for (int i = 0; i < 10; i++)
        {
            Quote quote = new Quote()
            {
                Author = "Author #" + i.ToString(),
                QuoteText = "This is quote #" + i.ToString(),
            };

            quotes.Add(quote);
        }

        XmlWriterSettings xmlwrtrstngs = new XmlWriterSettings();
        xmlwrtrstngs.Indent = true;
        using(IsolatedStorageFile isostrg = IsolatedStorageFile.GetUserStoreForApplication())
        {
            using(IsolatedStorageFileStream isoflstrm = isostrg.OpenFile("Quotes.xml", FileMode.Create))
            {
                XmlSerializer xmlsrlzr = new XmlSerializer(typeof(QuoteCollection));
                using(XmlWriter xmlwrtr = XmlWriter.Create(isoflstrm, xmlwrtrstngs))
                {
                    xmlsrlzr.Serialize(xmlwrtr, quoteCollection);
                }
            }
        }

        loadData();
    }

    void loadData()
    {
        try
        {
            using(IsolatedStorageFile isostrg = IsolatedStorageFile.GetUserStoreForApplication())
            {
                using(IsolatedStorageFileStream isoflstrm = isostrg.OpenFile("Quotes.xml", FileMode.Open))
                {
                    XmlSerializer xmlsrlzr = new XmlSerializer(typeof(QuoteCollection));
                    QuoteCollection quoteCollectionFromXML = (QuoteCollection)xmlsrlzr.Deserialize(isoflstrm);
                    LstBx.ItemsSource = quoteCollectionFromXML.Quotes;
                }
            }
        }
        catch(Exception)
        {

            Console.Write("Something went wrong with the XML!");
        }


    }

QuoteCollection

public class QuoteCollection : INotifyPropertyChanged
{
    ObservableCollection<Quote> quotes;
    public event PropertyChangedEventHandler PropertyChanged;

    public ObservableCollection<Quote> Quotes
    {
        get { return quotes; }

        set
        {
            if(quotes != value)
            {
                quotes = value;
                raisePropertyChanged("Quotes");
            }
        }
    }

    protected virtual void raisePropertyChanged(string argPropertyChanged)
    {
        if(PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(argPropertyChanged));
        }
    }
}

引用

public class Quote : INotifyPropertyChanged
{
    string author;
    string quoteText;
    public event PropertyChangedEventHandler PropertyChanged;

    public string Author
    {
        get
        {
            return author;
        }

        set
        {
            if(author != value)
            {
                author = value;
                onPropertyChanged("Author");
            }
        }
    }

    public string QuoteText
    {
        get
        {
            return quoteText;
        }

        set
        {
            if(quoteText != value)
            {
                quoteText = value;
                onPropertyChanged("QuoteText");
            }
        }
    }

    protected virtual void onPropertyChanged(string argProperty)
    {
        if(PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(argProperty));
        }
    }
}

任何见解都会非常感激：）

Answer 1

您使用QuoteCollection作为类型进行序列化，但实际上是在写出ObservableCollection<Quote>。

Answer 2

忘记将ObservableCollection放入我之前创建的QuoteCollection实例中（未在发布的代码中显示）。

xml序列化/反序列化有问题

2 个答案: