XmlSerializer change encoding

问题:

I am using this code to Serialize XML to String:

XmlWriterSettings xmlWriterSettings = new XmlWriterSettings {     indent = true,     Encoding = Encoding.UTF8 };  using (var sw = new StringWriter()) {     using (XmlWriter xmlWriter = XmlWriter.Create(sw, xmlWriterSettings))     {         XmlSerializer xmlSerializer = new XmlSerializer(moviesObject.GetType(), new XmlRootAttribute("category"));         xmlSerializer.Serialize(xmlWriter, moviesObject);     }     return sw.ToString(); } 

The problem is that i get :

<?xml version="1.0" encoding="utf-16"?> <category xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" havemore="no">   <items>     <movie>       <videoid>videoid1</videoid>       <title>title1</title>     </movie>   </items> </category> 

There is any way to change the <?xml version="1.0" encoding="utf-16"?> to <?xml version="1.0" encoding="utf-8"?> ?

回答1:

Here is a code with encoding as parameter. Please read the comments why there is a SuppressMessage for code analysis.

/// <summary> /// Serialize an object into an XML string /// </summary> /// <typeparam name="T">Type of object to serialize.</typeparam> /// <param name="obj">Object to serialize.</param> /// <param name="enc">Encoding of the serialized output.</param> /// <returns>Serialized (xml) object.</returns> [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2202:Do not dispose objects multiple times")] internal static String SerializeObject<T>(T obj, Encoding enc) {     using (MemoryStream ms = new MemoryStream())     {         XmlWriterSettings xmlWriterSettings = new System.Xml.XmlWriterSettings()         {             // If set to true XmlWriter would close MemoryStream automatically and using would then do double dispose             // Code analysis does not understand that. That's why there is a suppress message.             CloseOutput = false,              Encoding = enc,             OmitXmlDeclaration = false,             Indent = true         };         using (System.Xml.XmlWriter xw = System.Xml.XmlWriter.Create(ms, xmlWriterSettings))         {             XmlSerializer s = new XmlSerializer(typeof(T));             s.Serialize(xw, obj);         }          return enc.GetString(ms.ToArray());     } } 

回答2:

Try this

public static void SerializeXMLData(string pth, object xmlobj)     {         XmlSerializer serializer = new XmlSerializer(xmlobj.GetType());         using (XmlTextWriter tw = new XmlTextWriter(pth, Encoding.UTF8))         {             tw.Formatting = Formatting.Indented;             serializer.Serialize(tw, xmlobj);         }     } 

回答3:

The solution is simple:
Use a class of StringWriter that derives from StringWriter, and set the encoding in the constructor, and overwrite the Encoding property of the base class:

public sealed class StringWriterWithEncoding : System.IO.StringWriter {     private readonly System.Text.Encoding encoding;      public StringWriterWithEncoding(System.Text.StringBuilder sb) : base(sb)     {         this.encoding = System.Text.Encoding.Unicode;     }       public StringWriterWithEncoding(System.Text.Encoding encoding)     {         this.encoding = encoding;     }      public StringWriterWithEncoding(System.Text.StringBuilder sb, System.Text.Encoding encoding) : base(sb)     {         this.encoding = encoding;     }      public override System.Text.Encoding Encoding     {         get { return encoding; }     } } 

Then just pass an instance of StringWriterWithEnccoding to your method:

public static string SerializeToXml<T>(T ThisTypeInstance) {     System.Text.StringBuilder sb = new System.Text.StringBuilder();     string strReturnValue = null;      //SerializeToXml<T>(ThisTypeInstance, new System.IO.StringWriter(sb));     SerializeToXml<T>(ThisTypeInstance, new StringWriterWithEncoding(sb, System.Text.Encoding.UTF8));      strReturnValue = sb.ToString();     sb = null;      return strReturnValue; } // End Function SerializeToXml 

文章来源: XmlSerializer change encoding