C# - 反序列化List <string> </string>

时间:2010-02-04 17:40:56

标签: c# serialization extension-methods

我可以非常轻松地序列化列表:

List<String> fieldsToNotCopy =new List<String> {"Iteration Path","Iteration ID"};
fieldsToNotCopy.SerializeObject("FieldsToNotMove.xml");

现在我需要一个像这样的方法:

List<String> loadedList = new List<String();
loadedList.DeserializeObject("FieldsToNotMove.xml");

有这样的方法吗?或者我是否需要创建一个XML阅读器并以这种方式加载它?


编辑:原来没有内置的SerialzeObject。我早些时候在我的项目中做了一个而忘了它。当我发现它时,我认为它是内置的。如果你很好奇,这就是我所做的SerializeObject:

// Save an object out to the disk
public static void SerializeObject<T>(this T toSerialize, String filename)
{
   XmlSerializer xmlSerializer = new XmlSerializer(toSerialize.GetType());
   TextWriter textWriter = new StreamWriter(filename);

   xmlSerializer.Serialize(textWriter, toSerialize);
   textWriter.Close();
}

4 个答案:

答案 0 :(得分:18)

没有像SerializeObject这样的内置方法,但编写一个方法并不是非常困难。

public void SerializeObject(this List<string> list, string fileName) {
  var serializer = new XmlSerializer(typeof(List<string>));
  using ( var stream = File.OpenWrite(fileName)) {
    serializer.Serialize(stream, list);
  }
}

反序列化

public void Deserialize(this List<string> list, string fileName) {
  var serializer = new XmlSerializer(typeof(List<string>));
  using ( var stream = File.OpenRead(fileName) ){
    var other = (List<string>)(serializer.Deserialize(stream));
    list.Clear();
    list.AddRange(other);
  }
}

答案 1 :(得分:4)

这些是我的序列化/反序列化扩展方法,效果很好

public static class SerializationExtensions
{
    public static XElement Serialize(this object source)
    {
        try
        {
            var serializer = XmlSerializerFactory.GetSerializerFor(source.GetType());
            var xdoc = new XDocument();
            using (var writer = xdoc.CreateWriter())
            {
                serializer.Serialize(writer, source, new XmlSerializerNamespaces(new[] { new XmlQualifiedName("", "") }));
            }

            return (xdoc.Document != null) ? xdoc.Document.Root : new XElement("Error", "Document Missing");
        }
        catch (Exception x)
        {
            return new XElement("Error", x.ToString());
        }
    }

    public static T Deserialize<T>(this XElement source) where T : class
    {
        try
        {
            var serializer = XmlSerializerFactory.GetSerializerFor(typeof(T));

            return (T)serializer.Deserialize(source.CreateReader());
        }
        catch //(Exception x)
        {
            return null;
        }
    }
}

public static class XmlSerializerFactory
{
    private static Dictionary<Type, XmlSerializer> serializers = new Dictionary<Type, XmlSerializer>();

    public static XmlSerializer GetSerializerFor(Type typeOfT)
    {
        if (!serializers.ContainsKey(typeOfT))
        {
            System.Diagnostics.Debug.WriteLine(string.Format("XmlSerializerFactory.GetSerializerFor(typeof({0}));", typeOfT));

            var newSerializer = new XmlSerializer(typeOfT);
            serializers.Add(typeOfT, newSerializer);
        }

        return serializers[typeOfT];
    }
}

您只需要为列表定义类型并使用它

public class StringList : List<String> { }

哦,你不需要XmlSerializerFactory,它就在那里,因为创建一个序列化程序很慢,如果你反复使用同一个,这会加快你的应用程序。

答案 2 :(得分:1)

我不确定这是否会对你有所帮助,但我有一些我认为与你相似的东西。

//A list that holds my data
private List<Location> locationCollection = new List<Location>();


public bool Load()
{
            //For debug purposes
            Console.WriteLine("Loading Data");

            XmlSerializer serializer = new XmlSerializer(typeof(List<Location>));
            FileStream fs = new FileStream("CurrencyData.xml", FileMode.Open);

            locationCollection = (List<Location>)serializer.Deserialize(fs);

            fs.Close();

            Console.WriteLine("Data Loaded");
            return true;
}

这允许我将所有数据反序列化回List&lt;&gt;但我建议把它放在一个尝试 - 抓住块以确保安全。事实上,现在只是看着这个就会让我在“使用”块中重写它。

我希望这会有所帮助。

修改

道歉,只是注意到你试图以不同的方式做到这一点,但无论如何我都会留下答案。

答案 3 :(得分:0)

反序列化对象时出现错误。错误为“ XML文档(0,0)中存在错误” 。我修改了最初由@JaredPar编写的Deserialize函数来解决此错误。对某人可能有用:

public static void Deserialize(this List<string> list, string fileName)
{
    XmlRootAttribute xmlRoot = new XmlRootAttribute();
    xmlRoot.ElementName = "YourRootElementName";
    xmlRoot.IsNullable = true;

    var serializer = new XmlSerializer(typeof(List<string>), xmlRoot);
    using (var stream = File.OpenRead(fileName))
    {
        var other = (List<string>)(serializer.Deserialize(stream));
        list.Clear();
        list.AddRange(other);
    }
}