如何讓XmlSerialiser不以<?xml ?>開頭？

Question

我正在使用的文件格式（OFX）類似於XML，並且在類XML位開始之前包含一堆純文本內容。它不喜歡在純文本和XML部分之間，所以我想知道是否有辦法讓XmlSerialiser忽略它。我知道我可以通過這個文件並清除那條線，但是不要把它寫在第一位就更簡單和更清潔！有任何想法嗎？

Answer 1

不是太強悍，你只需要序列化到一個明確聲明的XmlWriter，並在序列化之前在該writer上設置選項。

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(); 
    } 
} 

Answer 2

您必須在調用Serialize方法時操作您使用的XML編寫器對象。其Settings屬性有一個OmitXmlDeclaration屬性，您希望將其設置爲true。您還需要設置ConformanceLevel屬性，否則XmlWriter將忽略OmitXmlDeclaration屬性。

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();