GetPrefixOfNamespace()

string? System.Xml.Linq.XElement.GetPrefixOfNamespace ( XNamespace ns )

inline

Definition at line 305 of file XElement.cs.

    {
        if (ns == null)
        {
            throw new ArgumentNullException("ns");
        }
        string namespaceName = ns.NamespaceName;
        bool flag = false;
        XElement xElement = this;
        do
        {
            XAttribute xAttribute = xElement.lastAttr;
            if (xAttribute != null)
            {
                bool flag2 = false;
                do
                {
                    xAttribute = xAttribute.next;
                    if (xAttribute.IsNamespaceDeclaration)
                    {
                        if (xAttribute.Value == namespaceName && xAttribute.Name.NamespaceName.Length != 0 && (!flag || GetNamespaceOfPrefixInScope(xAttribute.Name.LocalName, xElement) == null))
                        {
                            return xAttribute.Name.LocalName;
                        }
                        flag2 = true;
                    }
                }
                while (xAttribute != xElement.lastAttr);
                flag = flag || flag2;
            }
            xElement = xElement.parent as XElement;
        }
        while (xElement != null);
        if ((object)namespaceName == "http://www.w3.org/XML/1998/namespace")
        {
            if (!flag || GetNamespaceOfPrefixInScope("xml", null) == null)
            {
                return "xml";
            }
        }
        else if ((object)namespaceName == "http://www.w3.org/2000/xmlns/")
        {
            return "xmlns";
        }
        return null;
    }

References System.Xml.Linq.XElement.XElement(), System.Xml.Dictionary, System.Xml.Linq.XElement.GetNamespaceOfPrefixInScope(), and System.Xml.Linq.XNamespace.NamespaceName.