如何使用C#从XML中删除所有名称空间?

时间:2009-06-12 15:03:08

标签: c# xml

我正在寻找干净,优雅和智能的解决方案来从所有XML元素中删除名称空间?如何做到这一点的功能?

定义的界面:

public interface IXMLUtils
{
        string RemoveAllNamespaces(string xmlDocument);
}

从以下位置删除NS的示例XML:

<?xml version="1.0" encoding="utf-16"?>
<ArrayOfInserts xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <insert>
    <offer xmlns="http://schema.peters.com/doc_353/1/Types">0174587</offer>
    <type2 xmlns="http://schema.peters.com/doc_353/1/Types">014717</type2>
    <supplier xmlns="http://schema.peters.com/doc_353/1/Types">019172</supplier>
    <id_frame xmlns="http://schema.peters.com/doc_353/1/Types" />
    <type3 xmlns="http://schema.peters.com/doc_353/1/Types">
      <type2 />
      <main>false</main>
    </type3>
    <status xmlns="http://schema.peters.com/doc_353/1/Types">Some state</status>
  </insert>
</ArrayOfInserts>

在我们调用RemoveAllNamespaces(xmlWithLotOfNs)后,我们应该得到:

  <?xml version="1.0" encoding="utf-16"?>
    <ArrayOfInserts>
      <insert>
        <offer >0174587</offer>
        <type2 >014717</type2>
        <supplier >019172</supplier>
        <id_frame  />
        <type3 >
          <type2 />
          <main>false</main>
        </type3>
        <status >Some state</status>
      </insert>
    </ArrayOfInserts>

解决方案的优先语言是.NET 3.5 SP1上的C#。

30 个答案:

答案 0 :(得分:99)

嗯,这是最后的答案。我使用了很棒的Jimmy想法(遗憾的是它本身并不完整)和完整的递归功能才能正常工作。

基于界面:

string RemoveAllNamespaces(string xmlDocument);

我在这里代表了用于删除XML名称空间的最终干净且通用的C#解决方案:

//Implemented based on interface, not part of algorithm
public static string RemoveAllNamespaces(string xmlDocument)
{
    XElement xmlDocumentWithoutNs = RemoveAllNamespaces(XElement.Parse(xmlDocument));

    return xmlDocumentWithoutNs.ToString();
}

//Core recursion function
 private static XElement RemoveAllNamespaces(XElement xmlDocument)
    {
        if (!xmlDocument.HasElements)
        {
            XElement xElement = new XElement(xmlDocument.Name.LocalName);
            xElement.Value = xmlDocument.Value;

            foreach (XAttribute attribute in xmlDocument.Attributes())
                xElement.Add(attribute);

            return xElement;
        }
        return new XElement(xmlDocument.Name.LocalName, xmlDocument.Elements().Select(el => RemoveAllNamespaces(el)));
    }

它正在100%工作,但我没有进行过多次测试,因此它可能无法涵盖一些特殊情况......但它是开始的良好基础。

答案 1 :(得分:60)

标记最有用的答案有两个缺陷:

  • 忽略属性
  • 它不适用于“混合模式”元素

以下是我对此的看法:

 public static XElement RemoveAllNamespaces(XElement e)
 {
    return new XElement(e.Name.LocalName,
      (from n in e.Nodes()
        select ((n is XElement) ? RemoveAllNamespaces(n as XElement) : n)),
          (e.HasAttributes) ? 
            (from a in e.Attributes() 
               where (!a.IsNamespaceDeclaration)  
               select new XAttribute(a.Name.LocalName, a.Value)) : null);
  }          

示例代码here

答案 2 :(得分:25)

使用LINQ的强制性答案:

static XElement stripNS(XElement root) {
    return new XElement(
        root.Name.LocalName,
        root.HasElements ? 
            root.Elements().Select(el => stripNS(el)) :
            (object)root.Value
    );
}
static void Main() {
    var xml = XElement.Parse(@"<?xml version=""1.0"" encoding=""utf-16""?>
    <ArrayOfInserts xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"">
      <insert>
        <offer xmlns=""http://schema.peters.com/doc_353/1/Types"">0174587</offer>
        <type2 xmlns=""http://schema.peters.com/doc_353/1/Types"">014717</type2>
        <supplier xmlns=""http://schema.peters.com/doc_353/1/Types"">019172</supplier>
        <id_frame xmlns=""http://schema.peters.com/doc_353/1/Types"" />
        <type3 xmlns=""http://schema.peters.com/doc_353/1/Types"">
          <type2 />
          <main>false</main>
        </type3>
        <status xmlns=""http://schema.peters.com/doc_353/1/Types"">Some state</status>
      </insert>
    </ArrayOfInserts>");
    Console.WriteLine(stripNS(xml));
}

答案 3 :(得分:24)

这样就可以了: - )

foreach (XElement XE in Xml.DescendantsAndSelf())
{
    // Stripping the namespace by setting the name of the element to it's localname only
    XE.Name = XE.Name.LocalName;
    // replacing all attributes with attributes that are not namespaces and their names are set to only the localname
    XE.ReplaceAttributes((from xattrib in XE.Attributes().Where(xa => !xa.IsNamespaceDeclaration) select new XAttribute(xattrib.Name.LocalName, xattrib.Value)));
}

答案 4 :(得分:16)

再次拿起它,在C#中添加了用于复制属性的行:

    static XElement stripNS(XElement root)
    {
        XElement res = new XElement(
            root.Name.LocalName,
            root.HasElements ?
                root.Elements().Select(el => stripNS(el)) :
                (object)root.Value
        );

        res.ReplaceAttributes(
            root.Attributes().Where(attr => (!attr.IsNamespaceDeclaration)));

        return res;
    }

答案 5 :(得分:9)

使用XSLT的强制性答案:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="no" encoding="UTF-8"/>

  <xsl:template match="/|comment()|processing-instruction()">
    <xsl:copy>
      <xsl:apply-templates/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="*">
    <xsl:element name="{local-name()}">
      <xsl:apply-templates select="@*|node()"/>
    </xsl:element>
  </xsl:template>

  <xsl:template match="@*">
    <xsl:attribute name="{local-name()}">
      <xsl:value-of select="."/>
    </xsl:attribute>
  </xsl:template>

</xsl:stylesheet>

答案 6 :(得分:9)

我知道这个问题应该已经解决了,但我对它的实施方式并不完全满意。我在MSDN博客上发现了另一个来源,它有一个被覆盖的XmlTextWriter类,它删除了命名空间。我稍微调整了一下以获得我想要的其他东西,比如漂亮的格式化和保留根元素。这就是我目前项目中的内容。

http://blogs.msdn.com/b/kaevans/archive/2004/08/02/206432.aspx

/// <summary>
/// Modified XML writer that writes (almost) no namespaces out with pretty formatting
/// </summary>
/// <seealso cref="http://blogs.msdn.com/b/kaevans/archive/2004/08/02/206432.aspx"/>
public class XmlNoNamespaceWriter : XmlTextWriter
{
    private bool _SkipAttribute = false;
    private int _EncounteredNamespaceCount = 0;

    public XmlNoNamespaceWriter(TextWriter writer)
        : base(writer)
    {
        this.Formatting = System.Xml.Formatting.Indented;
    }

    public override void WriteStartElement(string prefix, string localName, string ns)
    {
        base.WriteStartElement(null, localName, null);
    }

    public override void WriteStartAttribute(string prefix, string localName, string ns)
    {
        //If the prefix or localname are "xmlns", don't write it.
        //HOWEVER... if the 1st element (root?) has a namespace we will write it.
        if ((prefix.CompareTo("xmlns") == 0
                || localName.CompareTo("xmlns") == 0)
            && _EncounteredNamespaceCount++ > 0)
        {
            _SkipAttribute = true;
        }
        else
        {
            base.WriteStartAttribute(null, localName, null);
        }
    }

    public override void WriteString(string text)
    {
        //If we are writing an attribute, the text for the xmlns
        //or xmlns:prefix declaration would occur here.  Skip
        //it if this is the case.
        if (!_SkipAttribute)
        {
            base.WriteString(text);
        }
    }

    public override void WriteEndAttribute()
    {
        //If we skipped the WriteStartAttribute call, we have to
        //skip the WriteEndAttribute call as well or else the XmlWriter
        //will have an invalid state.
        if (!_SkipAttribute)
        {
            base.WriteEndAttribute();
        }
        //reset the boolean for the next attribute.
        _SkipAttribute = false;
    }

    public override void WriteQualifiedName(string localName, string ns)
    {
        //Always write the qualified name using only the
        //localname.
        base.WriteQualifiedName(localName, null);
    }
}

用法

//Save the updated document using our modified (almost) no-namespace XML writer
using(StreamWriter sw = new StreamWriter(this.XmlDocumentPath))
using(XmlNoNamespaceWriter xw = new XmlNoNamespaceWriter(sw))
{
    //This variable is of type `XmlDocument`
    this.XmlDocumentRoot.Save(xw);
}

答案 7 :(得分:9)

这是一个完美的解决方案,也将删除XSI元素。 (如果删除xmlns并且不删除XSI,.Net会对你大喊......)

string xml = node.OuterXml;
//Regex below finds strings that start with xmlns, may or may not have :and some text, then continue with =
//and ", have a streach of text that does not contain quotes and end with ". similar, will happen to an attribute
// that starts with xsi.
string strXMLPattern = @"xmlns(:\w+)?=""([^""]+)""|xsi(:\w+)?=""([^""]+)""";
xml = Regex.Replace(xml, strXMLPattern, "");

答案 8 :(得分:8)

这是基于Peter Stegnar接受的答案的解决方案。

我用它,但(正如andygjp和John Saunders所说)他的代码忽略了属性

我也需要处理属性,所以我调整了他的代码。 Andy的版本是Visual Basic,这仍然是c#。

我知道已经有一段时间了,但也许有一天会有人节省一些时间。

    private static XElement RemoveAllNamespaces(XElement xmlDocument)
    {
        XElement xmlDocumentWithoutNs = removeAllNamespaces(xmlDocument);
        return xmlDocumentWithoutNs;
    }

    private static XElement removeAllNamespaces(XElement xmlDocument)
    {
        var stripped = new XElement(xmlDocument.Name.LocalName);            
        foreach (var attribute in
                xmlDocument.Attributes().Where(
                attribute =>
                    !attribute.IsNamespaceDeclaration &&
                    String.IsNullOrEmpty(attribute.Name.NamespaceName)))
        {
            stripped.Add(new XAttribute(attribute.Name.LocalName, attribute.Value));
        }
        if (!xmlDocument.HasElements)
        {
            stripped.Value = xmlDocument.Value;
            return stripped;
        }
        stripped.Add(xmlDocument.Elements().Select(
            el =>
                RemoveAllNamespaces(el)));            
        return stripped;
    }

答案 9 :(得分:6)

我真的很喜欢那里的Dexter,所以我把它翻译成了一个“流畅的”扩展方法:

/// <summary>
/// Returns the specified <see cref="XElement"/>
/// without namespace qualifiers on elements and attributes.
/// </summary>
/// <param name="element">The element</param>
public static XElement WithoutNamespaces(this XElement element)
{
    if (element == null) return null;

    #region delegates:

        Func<XNode, XNode> getChildNode = e => (e.NodeType == XmlNodeType.Element) ? (e as XElement).WithoutNamespaces() : e;

        Func<XElement, IEnumerable<XAttribute>> getAttributes = e => (e.HasAttributes) ?
            e.Attributes()
                .Where(a => !a.IsNamespaceDeclaration)
                .Select(a => new XAttribute(a.Name.LocalName, a.Value))
            :
            Enumerable.Empty<XAttribute>();

        #endregion

    return new XElement(element.Name.LocalName,
        element.Nodes().Select(getChildNode),
        getAttributes(element));
}

“流利”方法允许我这样做:

var xml = File.ReadAllText(presentationFile);
var xDoc = XDocument.Parse(xml);
var xRoot = xDoc.Root.WithoutNamespaces();

答案 10 :(得分:3)

稍微修改了Peter的答案,这对于属性也可以正常工作,包括删除命名空间和前缀。有点遗憾,代码看起来有点难看。

 private static XElement RemoveAllNamespaces(XElement xmlDocument)
        {
            if (!xmlDocument.HasElements)
            {
                XElement xElement = new XElement(xmlDocument.Name.LocalName);
                xElement.Value = xmlDocument.Value;

                foreach (XAttribute attribute in xmlDocument.Attributes())
                {
                    xElement.Add(new XAttribute(attribute.Name.LocalName, attribute.Value));
                }

                return xElement;
            }

            else
            {
                XElement xElement = new XElement(xmlDocument.Name.LocalName,  xmlDocument.Elements().Select(el => RemoveAllNamespaces(el)));

                foreach (XAttribute attribute in xmlDocument.Attributes())
                {
                    xElement.Add(new XAttribute(attribute.Name.LocalName, attribute.Value));
                }

                return xElement;
            }

    }

答案 11 :(得分:3)

你可以使用Linq来做到这一点:

public static string RemoveAllNamespaces(string xmlDocument)
{
    var xml = XElement.Parse(xmlDocument);
    xml.Descendants().Select(o => o.Name = o.Name.LocalName).ToArray();
    return xml.ToString();
}

答案 12 :(得分:2)

Jimmy和Peter的回复是一个很好的帮助,但他们实际上删除了所有属性,所以我做了一些修改:

Imports System.Runtime.CompilerServices

Friend Module XElementExtensions

    <Extension()> _
    Public Function RemoveAllNamespaces(ByVal element As XElement) As XElement
        If element.HasElements Then
            Dim cleanElement = RemoveAllNamespaces(New XElement(element.Name.LocalName, element.Attributes))
            cleanElement.Add(element.Elements.Select(Function(el) RemoveAllNamespaces(el)))
            Return cleanElement
        Else
            Dim allAttributesExceptNamespaces = element.Attributes.Where(Function(attr) Not attr.IsNamespaceDeclaration)
            element.ReplaceAttributes(allAttributesExceptNamespaces)
            Return element
        End If

    End Function

End Module

答案 13 :(得分:1)

在这一方面迟到了派对,但这是我最近使用的内容:

var doc = XDocument.Parse(xmlString);
doc.Root.DescendantNodesAndSelf().OfType<XElement>().Attributes().Where(att => att.IsNamespaceDeclaration).Remove();

(取自此MSDN Thread

编辑根据下面的评论,虽然这会从节点中删除命名空间前缀,但它实际上并未删除xmlns属性。为此,您还需要将每个节点的名称重置为其本地名称(例如,名称减去命名空间)

foreach (var node in doc.Root.DescendantNodesAndSelf().OfType<XElement>())
{
    node.Name = node.Name.LocalName;
}

答案 14 :(得分:1)

考虑可能交错TEXT和ELEMENT节点的另一种解决方案,例如:

<parent>
    text1
    <child1/>
    text2
    <child2/>
</parent>

代码:

using System.Linq;

namespace System.Xml.Linq
{
    public static class XElementTransformExtensions
    {
        public static XElement WithoutNamespaces(this XElement source)
        {
            return new XElement(source.Name.LocalName,
                source.Attributes().Select(WithoutNamespaces),
                source.Nodes().Select(WithoutNamespaces)
            );
        }

        public static XAttribute WithoutNamespaces(this XAttribute source)
        {
            return !source.IsNamespaceDeclaration
                ? new XAttribute(source.Name.LocalName, source.Value)
                : default(XAttribute);
        }

        public static XNode WithoutNamespaces(this XNode source)
        {
            return
                source is XElement
                    ? WithoutNamespaces((XElement)source)
                    : source;
        }
    }
}

答案 15 :(得分:1)

我的回答,基于字符串操作,
最简单的代码,

public static string hilangkanNamespace(string instrXML)
    {
        char chrOpeningTag = '<';
        char chrClosingTag = '>';
        char chrSpasi = ' ';
        int intStartIndex = 0;
        do
        {
            int intIndexKu = instrXML.IndexOf(chrOpeningTag, intStartIndex);
            if (intIndexKu < 0)
                break; //kalau dah ga ketemu keluar
            int intStart = instrXML.IndexOfAny(new char[] { chrSpasi, chrClosingTag }, intIndexKu + 1); //mana yang ketemu duluan
            if (intStart < 0)
                break; //kalau dah ga ketemu keluar
            int intStop = instrXML.IndexOf(chrClosingTag, intStart);
            if (intStop < 0)
                break; //kalau dah ga ketemu keluar
            else
                intStop--; //exclude si closingTag
            int intLengthToStrip = intStop - intStart + 1;
            instrXML = instrXML.Remove(intStart, intLengthToStrip);
            intStartIndex = intStart;
        } while (true);

        return instrXML;
    }

答案 16 :(得分:1)

我尝试了前几个解决方案,并没有为我工作。主要是像其他人已经提到的那样删除属性的问题。我会说我的方法与Jimmy非常相似,使用了以对象作为参数的XElement构造函数。

public static XElement RemoveAllNamespaces(this XElement element)
{
    return new XElement(element.Name.LocalName,
                        element.HasAttributes ? element.Attributes().Select(a => new XAttribute(a.Name.LocalName, a.Value)) : null,
                        element.HasElements ? element.Elements().Select(e => RemoveAllNamespaces(e)) : null,
                        element.Value);
}

答案 17 :(得分:1)

添加my还会清除具有名称空间前缀的节点的名称:

    public static string RemoveAllNamespaces(XElement element)
    {
        string tex = element.ToString();
        var nsitems = element.DescendantsAndSelf().Select(n => n.ToString().Split(' ', '>')[0].Split('<')[1]).Where(n => n.Contains(":")).DistinctBy(n => n).ToArray();

        //Namespace prefix on nodes: <a:nodename/>
        tex = nsitems.Aggregate(tex, (current, nsnode) => current.Replace("<"+nsnode + "", "<" + nsnode.Split(':')[1] + ""));
        tex = nsitems.Aggregate(tex, (current, nsnode) => current.Replace("</" + nsnode + "", "</" + nsnode.Split(':')[1] + ""));

        //Namespace attribs
        var items = element.DescendantsAndSelf().SelectMany(d => d.Attributes().Where(a => a.IsNamespaceDeclaration || a.ToString().Contains(":"))).DistinctBy(o => o.Value);
        tex = items.Aggregate(tex, (current, xAttribute) => current.Replace(xAttribute.ToString(), ""));

        return tex;
    }

答案 18 :(得分:1)

简单的解决方案,实际上就地重新命名元素,而不是创建副本,并且可以很好地替换属性。

public void RemoveAllNamespaces(ref XElement value)
{
  List<XAttribute> attributesToRemove = new List<XAttribute>();
  foreach (void e_loopVariable in value.DescendantsAndSelf) {
    e = e_loopVariable;
    if (e.Name.Namespace != XNamespace.None) {
      e.Name = e.Name.LocalName;
    }
    foreach (void a_loopVariable in e.Attributes) {
      a = a_loopVariable;
      if (a.IsNamespaceDeclaration) {
        //do not keep it at all
        attributesToRemove.Add(a);
      } else if (a.Name.Namespace != XNamespace.None) {
        e.SetAttributeValue(a.Name.LocalName, a.Value);
        attributesToRemove.Add(a);
      }
    }
  }
  foreach (void a_loopVariable in attributesToRemove) {
    a = a_loopVariable;
    a.Remove();
  }
}

注意:这并不总是保留原始属性顺序,但我确信如果它对您很重要,您可以更改它以便轻松完成。

另请注意,如果您的XElement属性仅对命名空间唯一,那么也可以抛出异常,例如:

<root xmlns:ns1="a" xmlns:ns2="b">
    <elem ns1:dupAttrib="" ns2:dupAttrib="" />
</root>

这似乎是一个固有的问题。但是因为问题表明输出了一个String而不是一个XElement,在这种情况下你可以有一个解决方案来输出一个无效的XElement的有效字符串。

我也喜欢使用自定义XmlWriter的jocull答案,但是当我尝试它时,它对我不起作用。虽然看起来都是正确的,但我无法判断XmlNoNamespaceWriter类是否有任何影响;它绝对不是我想要的删除名称空间。

答案 19 :(得分:1)

如果你想要一个基于XSLT的解决方案,如果你想要干净,优雅和聪明,你需要框架的一些支持,特别是访问者模式可以使这变得轻而易举。不幸的是,它不在这里。

我已经实现了它的灵感来自LINQ的ExpressionVisitor,它具有类似的结构。有了这个,您可以将访问者模式应用于(LINQ-to-)XML对象。 (我对此进行了有限的测试,但据我所知,它的效果很好)

public abstract class XObjectVisitor
{
    public virtual XObject Visit(XObject node)
    {
        if (node != null)
            return node.Accept(this);
        return node;
    }

    public ReadOnlyCollection<XObject> Visit(IEnumerable<XObject> nodes)
    {
        return nodes.Select(node => Visit(node))
            .Where(node => node != null)
            .ToList()
            .AsReadOnly();
    }

    public T VisitAndConvert<T>(T node) where T : XObject
    {
        if (node != null)
            return Visit(node) as T;
        return node;
    }

    public ReadOnlyCollection<T> VisitAndConvert<T>(IEnumerable<T> nodes) where T : XObject
    {
        return nodes.Select(node => VisitAndConvert(node))
            .Where(node => node != null)
            .ToList()
            .AsReadOnly();
    }

    protected virtual XObject VisitAttribute(XAttribute node)
    {
        return node.Update(node.Name, node.Value);
    }

    protected virtual XObject VisitComment(XComment node)
    {
        return node.Update(node.Value);
    }

    protected virtual XObject VisitDocument(XDocument node)
    {
        return node.Update(
            node.Declaration,
            VisitAndConvert(node.Nodes())
        );
    }

    protected virtual XObject VisitElement(XElement node)
    {
        return node.Update(
            node.Name,
            VisitAndConvert(node.Attributes()),
            VisitAndConvert(node.Nodes())
        );
    }

    protected virtual XObject VisitDocumentType(XDocumentType node)
    {
        return node.Update(
            node.Name,
            node.PublicId,
            node.SystemId,
            node.InternalSubset
        );
    }

    protected virtual XObject VisitProcessingInstruction(XProcessingInstruction node)
    {
        return node.Update(
            node.Target,
            node.Data
        );
    }

    protected virtual XObject VisitText(XText node)
    {
        return node.Update(node.Value);
    }

    protected virtual XObject VisitCData(XCData node)
    {
        return node.Update(node.Value);
    }

    #region Implementation details
    internal InternalAccessor Accessor
    {
        get { return new InternalAccessor(this); }
    }

    internal class InternalAccessor
    {
        private XObjectVisitor visitor;
        internal InternalAccessor(XObjectVisitor visitor) { this.visitor = visitor; }

        internal XObject VisitAttribute(XAttribute node) { return visitor.VisitAttribute(node); }
        internal XObject VisitComment(XComment node) { return visitor.VisitComment(node); }
        internal XObject VisitDocument(XDocument node) { return visitor.VisitDocument(node); }
        internal XObject VisitElement(XElement node) { return visitor.VisitElement(node); }
        internal XObject VisitDocumentType(XDocumentType node) { return visitor.VisitDocumentType(node); }
        internal XObject VisitProcessingInstruction(XProcessingInstruction node) { return visitor.VisitProcessingInstruction(node); }
        internal XObject VisitText(XText node) { return visitor.VisitText(node); }
        internal XObject VisitCData(XCData node) { return visitor.VisitCData(node); }
    }
    #endregion
}

public static class XObjectVisitorExtensions
{
    #region XObject.Accept "instance" method
    public static XObject Accept(this XObject node, XObjectVisitor visitor)
    {
        Validation.CheckNullReference(node);
        Validation.CheckArgumentNull(visitor, "visitor");

        // yay, easy dynamic dispatch
        Acceptor acceptor = new Acceptor(node as dynamic);
        return acceptor.Accept(visitor);
    }
    private class Acceptor
    {
        public Acceptor(XAttribute node) : this(v => v.Accessor.VisitAttribute(node)) { }
        public Acceptor(XComment node) : this(v => v.Accessor.VisitComment(node)) { }
        public Acceptor(XDocument node) : this(v => v.Accessor.VisitDocument(node)) { }
        public Acceptor(XElement node) : this(v => v.Accessor.VisitElement(node)) { }
        public Acceptor(XDocumentType node) : this(v => v.Accessor.VisitDocumentType(node)) { }
        public Acceptor(XProcessingInstruction node) : this(v => v.Accessor.VisitProcessingInstruction(node)) { }
        public Acceptor(XText node) : this(v => v.Accessor.VisitText(node)) { }
        public Acceptor(XCData node) : this(v => v.Accessor.VisitCData(node)) { }

        private Func<XObjectVisitor, XObject> accept;
        private Acceptor(Func<XObjectVisitor, XObject> accept) { this.accept = accept; }

        public XObject Accept(XObjectVisitor visitor) { return accept(visitor); }
    }
    #endregion

    #region XObject.Update "instance" method
    public static XObject Update(this XAttribute node, XName name, string value)
    {
        Validation.CheckNullReference(node);
        Validation.CheckArgumentNull(name, "name");
        Validation.CheckArgumentNull(value, "value");

        return new XAttribute(name, value);
    }
    public static XObject Update(this XComment node, string value = null)
    {
        Validation.CheckNullReference(node);

        return new XComment(value);
    }
    public static XObject Update(this XDocument node, XDeclaration declaration = null, params object[] content)
    {
        Validation.CheckNullReference(node);

        return new XDocument(declaration, content);
    }
    public static XObject Update(this XElement node, XName name, params object[] content)
    {
        Validation.CheckNullReference(node);
        Validation.CheckArgumentNull(name, "name");

        return new XElement(name, content);
    }
    public static XObject Update(this XDocumentType node, string name, string publicId = null, string systemId = null, string internalSubset = null)
    {
        Validation.CheckNullReference(node);
        Validation.CheckArgumentNull(name, "name");

        return new XDocumentType(name, publicId, systemId, internalSubset);
    }
    public static XObject Update(this XProcessingInstruction node, string target, string data)
    {
        Validation.CheckNullReference(node);
        Validation.CheckArgumentNull(target, "target");
        Validation.CheckArgumentNull(data, "data");

        return new XProcessingInstruction(target, data);
    }
    public static XObject Update(this XText node, string value = null)
    {
        Validation.CheckNullReference(node);

        return new XText(value);
    }
    public static XObject Update(this XCData node, string value = null)
    {
        Validation.CheckNullReference(node);

        return new XCData(value);
    }
    #endregion
}

public static class Validation
{
    public static void CheckNullReference<T>(T obj) where T : class
    {
        if (obj == null)
            throw new NullReferenceException();
    }

    public static void CheckArgumentNull<T>(T obj, string paramName) where T : class
    {
        if (obj == null)
            throw new ArgumentNullException(paramName);
    }
}

p.s。,这个特殊的实现使用一些.NET 4特性使实现更容易/更清晰(使用dynamic和默认参数)。它不应该太难以使.NET 3.5兼容,甚至可能与.NET 2.0兼容。

然后要实现访问者,这里是一个可以更改多个名称空间(以及使用的前缀)的通用名称。

public class ChangeNamespaceVisitor : XObjectVisitor
{
    private INamespaceMappingManager manager;
    public ChangeNamespaceVisitor(INamespaceMappingManager manager)
    {
        Validation.CheckArgumentNull(manager, "manager");

        this.manager = manager;
    }

    protected INamespaceMappingManager Manager { get { return manager; } }

    private XName ChangeNamespace(XName name)
    {
        var mapping = Manager.GetMapping(name.Namespace);
        return mapping.ChangeNamespace(name);
    }

    private XObject ChangeNamespaceDeclaration(XAttribute node)
    {
        var mapping = Manager.GetMapping(node.Value);
        return mapping.ChangeNamespaceDeclaration(node);
    }

    protected override XObject VisitAttribute(XAttribute node)
    {
        if (node.IsNamespaceDeclaration)
            return ChangeNamespaceDeclaration(node);
        return node.Update(ChangeNamespace(node.Name), node.Value);
    }

    protected override XObject VisitElement(XElement node)
    {
        return node.Update(
            ChangeNamespace(node.Name),
            VisitAndConvert(node.Attributes()),
            VisitAndConvert(node.Nodes())
        );
    }
}

// and all the gory implementation details
public class NamespaceMappingManager : INamespaceMappingManager
{
    private Dictionary<XNamespace, INamespaceMapping> namespaces = new Dictionary<XNamespace, INamespaceMapping>();

    public NamespaceMappingManager Add(XNamespace fromNs, XNamespace toNs, string toPrefix = null)
    {
        var item = new NamespaceMapping(fromNs, toNs, toPrefix);
        namespaces.Add(item.FromNs, item);
        return this;
    }

    public INamespaceMapping GetMapping(XNamespace fromNs)
    {
        INamespaceMapping mapping;
        if (!namespaces.TryGetValue(fromNs, out mapping))
            mapping = new NullMapping();
        return mapping;
    }

    private class NullMapping : INamespaceMapping
    {
        public XName ChangeNamespace(XName name)
        {
            return name;
        }

        public XObject ChangeNamespaceDeclaration(XAttribute node)
        {
            return node.Update(node.Name, node.Value);
        }
    }

    private class NamespaceMapping : INamespaceMapping
    {
        private XNamespace fromNs;
        private XNamespace toNs;
        private string toPrefix;
        public NamespaceMapping(XNamespace fromNs, XNamespace toNs, string toPrefix = null)
        {
            this.fromNs = fromNs ?? "";
            this.toNs = toNs ?? "";
            this.toPrefix = toPrefix;
        }

        public XNamespace FromNs { get { return fromNs; } }
        public XNamespace ToNs { get { return toNs; } }
        public string ToPrefix { get { return toPrefix; } }

        public XName ChangeNamespace(XName name)
        {
            return name.Namespace == fromNs
                ? toNs + name.LocalName
                : name;
        }

        public XObject ChangeNamespaceDeclaration(XAttribute node)
        {
            if (node.Value == fromNs.NamespaceName)
            {
                if (toNs == XNamespace.None)
                    return null;
                var xmlns = !String.IsNullOrWhiteSpace(toPrefix)
                    ? (XNamespace.Xmlns + toPrefix)
                    : node.Name;
                return node.Update(xmlns, toNs.NamespaceName);
            }
            return node.Update(node.Name, node.Value);
        }
    }
}

public interface INamespaceMappingManager
{
    INamespaceMapping GetMapping(XNamespace fromNs);
}

public interface INamespaceMapping
{
    XName ChangeNamespace(XName name);
    XObject ChangeNamespaceDeclaration(XAttribute node);
}

还有一个小方法可以让球滚动:

T ChangeNamespace<T>(T node, XNamespace fromNs, XNamespace toNs, string toPrefix = null) where T : XObject
{
    return node.Accept(
        new ChangeNamespaceVisitor(
            new NamespaceMappingManager()
                .Add(fromNs, toNs, toPrefix)
        )
    ) as T;
}

然后删除名称空间,你可以像这样调用它:

var doc = ChangeNamespace(XDocument.Load(pathToXml),
    fromNs: "http://schema.peters.com/doc_353/1/Types",
    toNs: null);

使用此访问者,您可以编写INamespaceMappingManager以删除所有名称空间。

T RemoveAllNamespaces<T>(T node) where T : XObject
{
    return node.Accept(
        new ChangeNamespaceVisitor(new RemoveNamespaceMappingManager())
    ) as T;
}

public class RemoveNamespaceMappingManager : INamespaceMappingManager
{
    public INamespaceMapping GetMapping(XNamespace fromNs)
    {
        return new RemoveNamespaceMapping();
    }

    private class RemoveNamespaceMapping : INamespaceMapping
    {
        public XName ChangeNamespace(XName name)
        {
            return name.LocalName;
        }

        public XObject ChangeNamespaceDeclaration(XAttribute node)
        {
            return null;
        }
    }
}

答案 20 :(得分:1)

这是我的Dexter Legaspi C#版本的VB.NET版本

Shared Function RemoveAllNamespaces(ByVal e As XElement) As XElement
        Return New XElement(e.Name.LocalName, New Object() {(From n In e.Nodes Select If(TypeOf n Is XElement, RemoveAllNamespaces(TryCast(n, XElement)), n)), If(e.HasAttributes, (From a In e.Attributes Select a), Nothing)})
End Function

答案 21 :(得分:1)

对于要工作的属性,for循环用于添加属性应该在递归后进行,还需要检查是否IsNamespaceDeclaration:

private static XElement RemoveAllNamespaces(XElement xmlDocument)
{
    XElement xElement;

    if (!xmlDocument.HasElements)
    {
        xElement = new XElement(xmlDocument.Name.LocalName) { Value = xmlDocument.Value };
    }
    else
    {
        xElement = new XElement(xmlDocument.Name.LocalName, xmlDocument.Elements().Select(RemoveAllNamespaces));
    }

    foreach (var attribute in xmlDocument.Attributes())
    {
        if (!attribute.IsNamespaceDeclaration)
        {
            xElement.Add(attribute);
        }
    }

    return xElement;
}

答案 22 :(得分:0)

user892217的答案几乎是正确的。它不会按原样编译,因此需要对递归调用稍作修改:

private static XElement RemoveAllNamespaces(XElement xmlDocument)
{
    XElement xElement;

    if (!xmlDocument.HasElements)
    {
        xElement = new XElement(xmlDocument.Name.LocalName) { Value = xmlDocument.Value };
    }
    else
    {
        xElement = new XElement(xmlDocument.Name.LocalName, xmlDocument.Elements().Select(x => RemoveAllNamespaces(x)));
    }

    foreach (var attribute in xmlDocument.Attributes())
    {
        if (!attribute.IsNamespaceDeclaration)
        {
            xElement.Add(attribute);
        }
    }

    return xElement;
}

答案 23 :(得分:0)

这对我有用。

       FileStream fs = new FileStream(filePath, FileMode.Open);

       StreamReader sr = new StreamReader(fs);

        DataSet ds = new DataSet();
        ds.ReadXml(sr);
        ds.Namespace = "";

        string outXML = ds.GetXml();
        ds.Dispose();
        sr.Dispose();
        fs.Dispose();

答案 24 :(得分:0)

经过多次寻找这个问题的解决方案之后,这个特别的页面似乎有最多的牛肉......然而,没有什么比这更合适了,所以我采用了老式的方式,只是解析了我想要的东西。希望这有助于某人。 (注意:这也会删除SOAP或类似的信封内容。)

        public static string RemoveNamespaces(string psXml)
    {
        //
        // parse through the passed XML, and remove any and all namespace references...also
        // removes soap envelope/header(s)/body, or any other references via ":" entities,
        // leaving all data intact
        //
        string xsXml = "", xsCurrQtChr = "";
        int xiPos = 0, xiLastPos = psXml.Length - 1;
        bool xbInNode = false;

        while (xiPos <= xiLastPos)
        {
            string xsCurrChr = psXml.Substring(xiPos, 1);
            xiPos++;
            if (xbInNode)
            {
                if (xsCurrChr == ":")
                {
                    // soap envelope or body (or some such)
                    // we'll strip these node wrappers completely
                    // need to first strip the beginning of it off  (i.e. "<soap" or "<s")
                    int xi = xsXml.Length;
                    string xsChr = "";
                    do
                    {
                        xi--;
                        xsChr = xsXml.Substring(xi, 1);
                        xsXml = xsXml.Substring(0, xi);
                    } while (xsChr != "<");

                    // next, find end of node
                    string xsQt = "";
                    do
                    {
                        xiPos++;
                        if (xiPos <= xiLastPos)
                        {
                            xsChr = psXml.Substring(xiPos, 1);
                            if (xsQt.Length == 0)
                            {
                                if (xsChr == "'" || xsChr == "\"")
                                {
                                    xsQt = xsChr;
                                }
                            }
                            else
                            {
                                if (xsChr == xsQt)
                                {
                                    xsQt = "";  // end of quote
                                }
                                else
                                {
                                    if (xsChr == ">") xsChr = "x";      // stay in loop...this is not end of node
                                }
                            }
                        }
                    } while (xsChr != ">" && xiPos <= xiLastPos);
                    xiPos++;            // skip over closing ">"
                    xbInNode = false;
                }
                else
                {
                    if (xsCurrChr == ">")
                    {
                        xbInNode = false;
                        xsXml += xsCurrChr;
                    }
                    else
                    {
                        if (xsCurrChr == " " || xsCurrChr == "\t")
                        {
                            // potential namespace...let's check...next character must be "/"
                            // or more white space, and if not, skip until we find such
                            string xsChr = "";
                            int xiOrgLen = xsXml.Length;
                            xsXml += xsCurrChr;
                            do
                            {
                                if (xiPos <= xiLastPos)
                                {
                                    xsChr = psXml.Substring(xiPos, 1);
                                    xiPos++;
                                    if (xsChr == " " || xsChr == "\r" || xsChr == "\n" || xsChr == "\t")
                                    {
                                        // carry on..white space
                                        xsXml += xsChr;
                                    }
                                    else
                                    {
                                        if (xsChr == "/" || xsChr == ">")
                                        {
                                            xsXml += xsChr;
                                        }
                                        else
                                        {
                                            // namespace! - get rid of it
                                            xsXml = xsXml.Substring(0, xiOrgLen - 0);       // first, truncate any added whitespace
                                            // next, peek forward until we find "/" or ">"
                                            string xsQt = "";
                                            do
                                            {
                                                if (xiPos <= xiLastPos)
                                                {
                                                    xsChr = psXml.Substring(xiPos, 1);
                                                    xiPos++;
                                                    if (xsQt.Length > 0)
                                                    {
                                                        if (xsChr == xsQt) xsQt = ""; else xsChr = "x";
                                                    }
                                                    else
                                                    {
                                                        if (xsChr == "'" || xsChr == "\"") xsQt = xsChr;
                                                    }
                                                }
                                            } while (xsChr != ">" && xsChr != "/" && xiPos <= xiLastPos);
                                            if (xsChr == ">" || xsChr == "/") xsXml += xsChr;
                                            xbInNode = false;
                                        }
                                    }
                                }
                            } while (xsChr != ">" && xsChr != "/" && xiPos <= xiLastPos);
                        }
                        else
                        {
                            xsXml += xsCurrChr;
                        }
                    }
                }
            }
            else
            {
                //
                // if not currently inside a node, then we are in a value (or about to enter a new node)
                //
                xsXml += xsCurrChr;
                if (xsCurrQtChr.Length == 0)
                {
                    if (xsCurrChr == "<")
                    {
                        xbInNode = true;
                    }
                }
                else
                {
                    //
                    // currently inside a quoted string
                    //
                    if (xsCurrQtChr == xsCurrChr)
                    {
                        // finishing quoted string
                        xsCurrQtChr = "";
                    }
                }
            }
        }

        return (xsXml);
    }

答案 25 :(得分:0)

这里是Regex替换一个衬垫:

public static string RemoveNamespaces(this string xml)
{
    return Regex.Replace(xml, "((?<=<|<\\/)|(?<= ))[A-Za-z0-9]+:| xmlns(:[A-Za-z0-9]+)?=\".*?\"", "");
}

以下是一个示例: https://regex101.com/r/fopydN/6

警告:可能存在边缘情况!

答案 26 :(得分:0)

无需重新创建整个节点层次结构:

private static void RemoveDefNamespace(XElement element)
{
    var defNamespase = element.Attribute("xmlns");
    if (defNamespase != null)
        defNamespase.Remove();

    element.Name = element.Name.LocalName;
    foreach (var child in element.Elements())
    {
        RemoveDefNamespace(child);
    }
}

答案 27 :(得分:0)

我尝试了一些解决方案,但正如许多人所说,存在一些极端情况。

使用了上面的一些正则表达式,但得出的结论是单步正则表达式是不可行的。

这是我的解决方案,两步正则表达式,找到标签,删除标签内的内容,不要更改cdata:

            Func<Match, String> NamespaceRemover = delegate (Match match)
            {
                var result = match.Value;
                if (String.IsNullOrEmpty(match.Groups["cdata"].Value))
                {
                    // find all prefixes within start-, end tag and attributes and also namespace declarations
                    return Regex.Replace(result, "((?<=<|<\\/| ))\\w+:| xmlns(:\\w+)?=\".*?\"", "");
                }
                else
                {
                    // cdata as is
                    return result;
                }
            };
            // XmlDocument doc;
            // string file;
            doc.LoadXml(
              Regex.Replace(File.ReadAllText(file), 
                // find all begin, cdata and end tags (do not change order)
                @"<(?:\w+:?\w+.*?|(?<cdata>!\[CDATA\[.*?\]\])|\/\w+:?\w+)>", 
                new MatchEvaluator(NamespaceRemover)
              )
            );

现在它为我工作了100%。

答案 28 :(得分:-1)

我认为这是最简短的答案(但是对于像你这样的建筑,你会有另一个讨论,我也有正则表达式将"<bcm:info></bcm:info>"转换为&#34; <info></info>&#34;但它不是&# 39; t优化,如果有人问我,我会分享它。所以,我的解决方案是:

    public string RemoveAllNamespaces(string xmlDocument)
    {
        return Regex.Replace(xmlDocument, @"\sxmlns(\u003A\w+)?\u003D\u0022.+\u0022", " ");
    }

答案 29 :(得分:-1)

以下是针对此问题的基于正则表达式的解决方案......

    private XmlDocument RemoveNS(XmlDocument doc)
    {
        var xml = doc.OuterXml;
        var newxml = Regex.Replace(xml, @"xmlns[:xsi|:xsd]*="".*?""","");
        var newdoc = new XmlDocument();
        newdoc.LoadXml(newxml);
        return newdoc;
    }