c# - 如何使 XmlSerialiser 不以 开头？

Question

我正在使用的文件格式 (OFX) 类似于 XML，并且在类似于 XML 的位开始之前包含一堆纯文本内容。它不喜欢在纯文本和 XML 部分之间存在，所以我想知道是否有办法让 XmlSerialiser 忽略它。我知道我可以浏览文件并清除该行，但首先不写它会更简单、更清晰！有任何想法吗？

Answer 1

您必须在调用该Serialize方法时操作您使用的 XML 编写器对象。它的Settings属性有一个OmitXmlDeclaration属性，您需要将其设置为 true。您还需要设置该ConformanceLevel属性，否则 XmlWriter 将忽略该OmitXmlDeclaration属性。

XmlWriterSettings settings = new XmlWriterSettings();
settings.OmitXmlDeclaration = true;
settings.ConformanceLevel = ConformanceLevel.Fragment;
XmlWriter writer = XmlWriter.Create(/*whatever stream you need*/,settings);
serializer.Serialize(writer,objectToSerialize);
writer.close();

Answer 2

不太难，您只需序列化为显式声明的 XmlWriter 并在序列化之前设置该 writer 的选项。

public static string SerializeExplicit(SomeObject obj)
{    
    XmlWriterSettings settings;
    settings = new XmlWriterSettings();
    settings.OmitXmlDeclaration = true;

    XmlSerializerNamespaces ns;
    ns = new XmlSerializerNamespaces();
    ns.Add("", "");


    XmlSerializer serializer;
    serializer = new XmlSerializer(typeof(SomeObject));

    //Or, you can pass a stream in to this function and serialize to it.
    // or a file, or whatever - this just returns the string for demo purposes.
    StringBuilder sb = new StringBuilder();
    using(var xwriter = XmlWriter.Create(sb, settings))
    {

        serializer.Serialize(xwriter, obj, ns);
        return sb.ToString();
    }
}