C＃序列化程序未向根元素添加前缀

Question

看到很多人都遇到同样的问题，却在任何地方都没有答案，所以我自己在这里回答；

序列化应附加前缀的XML类时，前缀会丢失。

[XmlRoot(ElementName = "Preadvice", Namespace = "http://www.wibble.com/PreadviceRequest")]
public class Preadvice
{
}

var XMLNameSpaces = new XmlSerializerNamespaces();
XMLNameSpaces.Add("isd", "http://www.wibble.com/PreadviceRequest");

这是我的序列化方法；

public static string SerializeStandardObject<T>(T obj, XmlSerializerNamespaces ns, XmlAttributeOverrides xao, XmlRootAttribute xra)
{
    XmlSerializer serializer = new XmlSerializer(typeof(T), (xao == null ? new XmlAttributeOverrides() : xao), new Type[] { obj.GetType() }, (xra == null ? new XmlRootAttribute(obj.GetType().Name) : xra), "");

    using (StringWriter sw = new StringWriter())
    {
        using (System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(sw))
        {
            serializer.Serialize(writer, obj, (ns == null ? new XmlSerializerNamespaces() : ns));
        }
        return sw.ToString();
    }
}

这产生了；

<?xml version="1.0" encoding="utf-16"?>
<Preadvice xmlns:isd="http://www.wibble.com/PreadviceRequest">
</Preadvice>

缺少前缀，它应该看起来像这样。

<?xml version="1.0" encoding="utf-16"?>
<isd:Preadvice xmlns:isd="http://www.wibble.com/PreadviceRequest">
</isd:Preadvice>

Answer 1

如果序列化程序在创建时包含xmlroot属性，则它不应用您手动指定的名称空间，因此会丢失第一个元素的“ isd”标记。 最简单的解决方法是删除xmlroot属性。

public static string SerializeStandardObject<T>(T obj, XmlSerializerNamespaces ns)
{
    XmlSerializer serializer = new XmlSerializer(typeof(T));

    using (StringWriter sw = new StringWriter())
    {
        using (System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(sw))
        {
            serializer.Serialize(writer, obj, (ns == null ? new XmlSerializerNamespaces() : ns));
        }
        return sw.ToString();
    }
}