XmlSerializer 导致 XamlParseException

Question

我有一个简单的 WPF 应用程序，当我尝试使用 XmlSerializer 序列化一个简单的异常时，我得到了一个 XamlParseException。

MainWindow.xaml中的代码是：

<Window x:Class="WpfApplication2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Grid>

</Grid>
</Window>

App.xaml中的代码是：

<Application x:Class="WpfApplication2.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         StartupUri="MainWindow.xaml">
<Application.Resources>

</Application.Resources>

用于序列化的Serializer static class代码为：

public static class Serializer<T>
{
    /// <summary>
    /// serialize an instance to xml
    /// </summary>
    /// <param name="instance"> instance to serialize </param>
    /// <returns> instance as xml string </returns>
    public static string Serialize(T instance)
    {
        StringBuilder sb = new StringBuilder();
        XmlWriterSettings settings = new XmlWriterSettings();

        using (XmlWriter writer = XmlWriter.Create(sb, settings))
        {
            XmlSerializer serializer = new XmlSerializer(instance.GetType());
            serializer.Serialize(writer, instance);
        }

        return sb.ToString();
    }

    /// <summary>
    /// deserialize an xml into an instance
    /// </summary>
    /// <param name="xml"> xml string </param>
    /// <returns> instance </returns>
    public static T Deserialize(string xml)
    {
        using (XmlReader reader = XmlReader.Create(new StringReader(xml)))
        {
            foreach (Type t in types)
            {
                XmlSerializer serializer = new XmlSerializer(t);
                if (serializer.CanDeserialize(reader))
                    return (T)serializer.Deserialize(reader);
            }
        }

        return default(T);
    }

    /// <summary>
    /// store all derived types of T:
    /// is used in deserialization
    /// </summary>
    private static Type[] types = AppDomain.CurrentDomain.GetAssemblies()
                                        .SelectMany(s => s.GetTypes())
                                        .Where(t => typeof(T).IsAssignableFrom(t)
                                            && t.IsClass
                                            && !t.IsGenericType)
                                            .ToArray();
}

MainWindow.xaml.cs中的代码为：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication2
{
  /// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        Exception e = new System.IO.IOException("blablabla", new System.IO.DirectoryNotFoundException());
        MessageBox.Show(Serializer<Exception>.Serialize(e));
    }
   }
  }

当我运行这个时，我得到这个异常：

'The invocation of the constructor on type 'WpfApplication2.MainWindow' that matches the specified binding constraints threw an exception.' Line number '3' and line position '9'.

可能是什么问题？

Answer 1

如果您将其作为一个 孤立问题进行测试，您会看到 XmlSerializer 抛出 InvalidOperationException 消息

There was an error reflectig type 'System.IO.IOException'.

内部异常详细说明原因：

Cannot serialize member System.Exception.Data of type System.Collections.IDictionary, ...

无法使用 .NET XML 序列化程序序列化字典。就是这样。

XmlSerializer 导致 XamlParseException

XmlSerializer causes XamlParseException

c#

xml

wpf

serialization

exception