如何使用没有声明元素的xml编写器创建xml
我正在使用XmlWriter.Create()获取一个编写器实例然后编写XML，但结果是 ，我如何告诉我的xml编写器不生产它？
使用XmlWriterSettings.OmitXmlDeclaration 。
不要忘记将XmlWriterSettings.ConformanceLevel设置为ConformanceLevel.Fragment 。
您可以XmlTextWriter并覆盖WriteStartDocument()方法以不执行任何操作：
public class XmlFragmentWriter : XmlTextWriter { // Add whichever constructor(s) you need, eg: public XmlFragmentWriter(Stream stream, Encoding encoding) : base(stream, encoding) { } public override void WriteStartDocument() { // Do nothing (omit the declaration) } }
用法：
var stream = new MemoryStream(); var writer = new XmlFragmentWriter(stream, Encoding.UTF8); // Use the writer ...
参考：Scott Hanselman的博客文章 。
你可以使用XmlWriter.Create() ：
new XmlWriterSettings { OmitXmlDeclaration = true, ConformanceLevel = ConformanceLevel.Fragment } public static string FormatXml(string xml) { if (string.IsNullOrEmpty(xml)) return string.Empty; try { XmlDocument document = new XmlDocument(); document.LoadXml(xml); using (MemoryStream memoryStream = new MemoryStream()) using (XmlWriter writer = XmlWriter.Create( memoryStream, new XmlWriterSettings { Encoding = Encoding.Unicode, OmitXmlDeclaration = true, ConformanceLevel = ConformanceLevel.Fragment, Indent = true, NewLineOnAttributes = false })) { document.WriteContentTo(writer); writer.Flush(); memoryStream.Flush(); memoryStream.Position = 0; using (StreamReader streamReader = new StreamReader(memoryStream)) { return streamReader.ReadToEnd(); } } } catch (XmlException ex) { return "Unformatted Xml version." + Environment.NewLine + ex.Message; } catch (Exception ex) { return "Unformatted Xml version." + Environment.NewLine + ex.Message; } }