Question

我只是想使用.NET框架的XML-Serializer（版本2.0）。我创建了方法来序列化和反序列化我的设置：

public static void Save(string filename)
{
    var settings = Settings.Instance;

    if (File.Exists(filename))
        File.Delete(filename);

    using (var stream = File.OpenWrite(filename))
    {
        XmlSerializer serializer = new XmlSerializer(typeof(Settings));
        serializer.Serialize(stream, settings);
    }
}

Save-methods工作得非常好，因此我得到以下xml文档：

<?xml version="1.0"?>
<Settings xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <EnableHooking>true</EnableHooking>
  <IncludePressedKeys>false</IncludePressedKeys>
  <EnableFastScroll>false</EnableFastScroll>
  <FastScrollingHotKeys>
    <VirtualKeys>Control</VirtualKeys>
    <VirtualKeys>Alt</VirtualKeys>
  </FastScrollingHotKeys>
  <ScrollSpeed>2</ScrollSpeed>
  <FastScrollSpeed>10</FastScrollSpeed>
</Settings>

如果我尝试反序列化此文档，我会收到一个异常XmlException，它告诉我缺少根元素。我试图设置XmlRootAttribute，试图检查文件名和流位置。一切都好。现在我终于尝试通过XmlDocument类读取加载文件，该类工作正常。现在我真的不知道会发生什么。所以你可以看一下Load-method：

public static void Load(string filename)
{
    if (!File.Exists(filename))
        throw new ArgumentException("File not found.", "filename", new FileNotFoundException());

    //works
    var doc = new XmlDocument();
    doc.Load(XmlReader.Create(File.OpenRead(filename)));
    Console.WriteLine(doc.DocumentElement.FirstChild);

    using (var stream = File.OpenRead(filename))
    {
        XmlSerializer serializer = new XmlSerializer(typeof(Settings));
        _instance = serializer.Deserialize(stream) as Settings;
    }
}

希望有人有个主意。

Answer 1

当我使用Xamarin Studio在OSX上使用以下代码（我在其中添加了一个简单版本的Settings类）时，我没有错误。

using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

namespace Test
{
    class MainClass
    {
        private static Settings _instance;

        public static void Main (string[] args)
        {
            Load ("Settings.xml");
        }

        public static void Load(string filename)
        {
            if (!File.Exists(filename))
                throw new ArgumentException("File not found.", "filename", new FileNotFoundException());

            //works
            var doc = new XmlDocument();
            doc.Load(XmlReader.Create(File.OpenRead(filename)));
            Console.WriteLine(doc.DocumentElement.FirstChild);

            using (var stream = File.OpenRead(filename))
            {
                XmlSerializer serializer = new XmlSerializer(typeof(Settings));
                _instance = serializer.Deserialize(stream) as Settings;
            }
        }
    }

    public class Settings
    {
        public bool EnableHooking {
            get;
            set;
        }
        public bool IncludePressedKeys {
            get;
            set;
        }
    }
}

当我检查_instance的值时，属性被设置为正确的值。我在第二个属性之后删除了XML。问题可能在于更“复杂”的XmlElement“FastScrollingHotKeys”。你可以发布你的设置课吗？

找不到根元素。问题？

1 个答案: