添加<？xml version =" 1.0"编码= QUOT; UTF-8英寸独立= QUOT;是"？>到我的xml响应 [英] Add <?xml version="1.0" encoding="UTF-8" standalone="yes"?> to my xml response

问题描述

我一直在与这个老问题作斗争，无法做到正确。我希望我的xml输出有 

<？xml version =" 1.0"编码= QUOT; UTF-8英寸独立= QUOT;是"？>在标题中。我一直在<？xml version =" 1.0"？>只要。我通过将以下代码添加到WebApiConfig.cs来剥离格式化程序

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; config.Formatters.Clear（）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; config.Formatters.Add（new IgnoreNamespacesXmlMediaTypeFormatter（））;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; config.Formatters.XmlFormatter.UseXmlSerializer = true;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; config.Formatters.XmlFormatter.WriterSettings.OmitXmlDeclaration = false;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; config.Formatters.XmlFormatter.WriterSettings.Encoding = System.Text.Encoding.UTF8;

我在XMLHelper中插入.WriteStartDocument（true） -

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;&NBSP;

  &NBSP; &NBSP; &NBSP; public static string Serialize（object objectInstance）

  &NBSP; &NBSP; &NBSP; {

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; string txt ="" ;;
$


  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; var emptyNamepsaces = new XmlSerializerNamespaces（new [] {XmlQualifiedName.Empty}）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; var serializer = new XmlSerializer（objectInstance.GetType（））;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; var settings = new XmlWriterSettings（）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; settings.OmitXmlDeclaration = false;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; //settings.Encoding = new UTF8Encoding（false）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; settings.ConformanceLevel = ConformanceLevel.Document;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; var memoryStream = new MemoryStream（）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;使用（var writer = XmlWriter.Create（memoryStream，settings））

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; {

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; writer.WriteStartDocument（true）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; serializer.Serialize（writer，objectInstance，emptyNamepsaces）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; txt = Encoding.UTF8.GetString（memoryStream.ToArray（））;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; }¥b $ b  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; return txt;

  &NBSP; &NBSP; &NBSP; } b $ b

请帮忙！

解决方案

 XmlDocument xml = new XmlDocument（）; 
 XmlNode docNode = xml.CreateXmlDeclaration（" 1.0"，" UTF-8 \" standalone = \" yes"，""）; 
 xml.AppendChild（docNode）; 
 Console.WriteLine（" Header：" + xml.OuterXml）; 

试一试。 （P lease d 如果它是您想要的答案，请不要忘记作为答案。）

$


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I've been battling with this old problem and can't get it right. I want my xml output to have 

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> in the header. I keep having <?xml version="1.0"?> only. I have stripped the formatters by adding the following codes to WebApiConfig.cs

            config.Formatters.Clear();
            config.Formatters.Add(new IgnoreNamespacesXmlMediaTypeFormatter());
            config.Formatters.XmlFormatter.UseXmlSerializer = true;
            config.Formatters.XmlFormatter.WriterSettings.OmitXmlDeclaration = false;
            config.Formatters.XmlFormatter.WriterSettings.Encoding = System.Text.Encoding.UTF8;

and I have inserted .WriteStartDocument(true) in my XMLHelper -

            

        public static string Serialize(object objectInstance)
        {
            string txt = "";

            var emptyNamepsaces = new XmlSerializerNamespaces(new[] { XmlQualifiedName.Empty });
            var serializer = new XmlSerializer(objectInstance.GetType());
            var settings = new XmlWriterSettings();
            settings.OmitXmlDeclaration = false;
            //settings.Encoding = new UTF8Encoding(false);
            settings.ConformanceLevel = ConformanceLevel.Document;

            var memoryStream = new MemoryStream();
            using (var writer = XmlWriter.Create(memoryStream, settings))
            {
                writer.WriteStartDocument(true);
                serializer.Serialize(writer, objectInstance, emptyNamepsaces);
                txt = Encoding.UTF8.GetString(memoryStream.ToArray());
            }
            return txt;
        }

Please help!

解决方案

XmlDocument xml = new XmlDocument();
XmlNode docNode = xml.CreateXmlDeclaration("1.0", "UTF-8\" standalone=\"yes", "");
xml.AppendChild(docNode);
Console.WriteLine("Header:" + xml.OuterXml);

Try it. (Please don't forget make as answer if that it the answer you want.)

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