用特殊字符反序列化XML的快速方法 [英] fast way to deserialize XML with special characters

问题描述

我正在寻找一种反序列化xml的快速方法，它带有ö等特殊字符。

I am looking for fast way to deserialize xml, that has special characters in it like ö.

我正在使用XMLReader，但无法反序列化此类字符。

I was using XMLReader and it fails to deserialze such characters.

有任何建议吗？

编辑：我正在使用C＃。
代码如下：

I am using C#. Code is as follows:

XElement element =.. //has the xml
XmlSerializer serializer =   new XmlSerializer(typeof(MyType));
XmlReader reader = element.CreateReader();
Object o= serializer.Deserialize(reader);

推荐答案

我猜你是在编码问题，而不是 XMLReader ，但带有 XmlSerializer 。

您可以使用 XmlTextWriter 和带有 XmlSerializer 如下例所示（请参见下面的通用方法以便更好地实现它）。可以与变音符号（äöü）和其他特殊字符一起使用。

I'd guess you're having an encoding issue, not in the XMLReader but with the XmlSerializer.

You could use the XmlTextWriter and UTF8 encoding with the XmlSerializer like in the following snippet (see the generic methods below for a way nicer implementation of it). Works just fine with umlauts (äöü) and other special characters.

class Program
{
    static void Main(string[] args)
    {
        SpecialCharacters specialCharacters = new SpecialCharacters { Umlaute = "äüö" };

        // serialize object to xml

        MemoryStream memoryStreamSerialize = new MemoryStream();
        XmlSerializer xmlSerializerSerialize = new XmlSerializer(typeof(SpecialCharacters));
        XmlTextWriter xmlTextWriterSerialize = new XmlTextWriter(memoryStreamSerialize, Encoding.UTF8);

        xmlSerializerSerialize.Serialize(xmlTextWriterSerialize, specialCharacters);
        memoryStreamSerialize = (MemoryStream)xmlTextWriterSerialize.BaseStream;

        // converts a byte array of unicode values (UTF-8 enabled) to a string
        UTF8Encoding encodingSerialize = new UTF8Encoding();
        string serializedXml = encodingSerialize.GetString(memoryStreamSerialize.ToArray());

        xmlTextWriterSerialize.Close();
        memoryStreamSerialize.Close();
        memoryStreamSerialize.Dispose();

        // deserialize xml to object

        // converts a string to a UTF-8 byte array.
        UTF8Encoding encodingDeserialize = new UTF8Encoding();
        byte[] byteArray = encodingDeserialize.GetBytes(serializedXml);

        using (MemoryStream memoryStreamDeserialize = new MemoryStream(byteArray))
        {
            XmlSerializer xmlSerializerDeserialize = new XmlSerializer(typeof(SpecialCharacters));
            XmlTextWriter xmlTextWriterDeserialize = new XmlTextWriter(memoryStreamDeserialize, Encoding.UTF8);

            SpecialCharacters deserializedObject = (SpecialCharacters)xmlSerializerDeserialize.Deserialize(xmlTextWriterDeserialize.BaseStream);
        }
    }
}

[Serializable]
public class SpecialCharacters
{
    public string Umlaute { get; set; }
}

我个人使用以下通用方法对XML和对象进行序列化和反序列化，

I personally use the follwing generic methods to serialize and deserialize XML and objects and haven't had any performance or encoding issues yet.

public static string SerializeObjectToXml<T>(T obj)
{
    MemoryStream memoryStream = new MemoryStream();
    XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
    XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8);

    xmlSerializer.Serialize(xmlTextWriter, obj);
    memoryStream = (MemoryStream)xmlTextWriter.BaseStream;

    string xmlString = ByteArrayToStringUtf8(memoryStream.ToArray());

    xmlTextWriter.Close();
    memoryStream.Close();
    memoryStream.Dispose();

    return xmlString;
}

public static T DeserializeXmlToObject<T>(string xml)
{
    using (MemoryStream memoryStream = new MemoryStream(StringToByteArrayUtf8(xml)))
    {
        XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));

        using (StreamReader xmlStreamReader = new StreamReader(memoryStream, Encoding.UTF8))
        {
            return (T)xmlSerializer.Deserialize(xmlStreamReader);
        }
    }
}

public static string ByteArrayToStringUtf8(byte[] value)
{
    UTF8Encoding encoding = new UTF8Encoding();
    return encoding.GetString(value);
}

public static byte[] StringToByteArrayUtf8(string value)
{
    UTF8Encoding encoding = new UTF8Encoding();
    return encoding.GetBytes(value);
}

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