XmlUtil.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / XmlUtil.cs / 1 / XmlUtil.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel
{ 
    using System.Xml;
    using System.Diagnostics; 
 
    static class XmlUtil
    { 
        public const string XmlNs = "http://www.w3.org/XML/1998/namespace";
        public const string XmlNsNs = "http://www.w3.org/2000/xmlns/";

        public static string GetXmlLangAttribute(XmlReader reader) 
        {
            string xmlLang = null; 
            if (reader.MoveToAttribute("lang", XmlNs)) 
            {
                xmlLang = reader.Value; 
                reader.MoveToElement();
            }

            if (xmlLang == null) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.XmlLangAttributeMissing)));
 
            return xmlLang; 
        }
 
        // FIX for 7455
        public static bool IsTrue(string booleanValue)
        {
            if (string.IsNullOrEmpty(booleanValue)) 
            {
                return false; 
            } 

            return XmlConvert.ToBoolean(booleanValue); 
        }

        public static void ReadContentAsQName(XmlReader reader, out string localName, out string ns)
        { 
            ParseQName(reader, reader.ReadContentAsString(), out localName, out ns);
        } 
 
        public static bool IsWhitespace(char ch)
        { 
            return (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n');
        }

        public static string TrimEnd(string s) 
        {
            int i; 
            for (i = s.Length; i > 0 && IsWhitespace(s[i - 1]); i--) 
                ;
 
            if (i != s.Length)
            {
                return s.Substring(0, i);
            } 

            return s; 
        } 

        public static string TrimStart(string s) 
        {
            int i;
            for (i = 0; i < s.Length && IsWhitespace(s[i]); i++)
                ; 

            if (i != 0) 
            { 
                return s.Substring(i);
            } 

            return s;
        }
 
        public static string Trim(string s)
        { 
            int i; 
            for (i = 0; i < s.Length && IsWhitespace(s[i]); i++);
            if (i >= s.Length) 
            {
                return string.Empty;
            }
 
            int j;
            for (j = s.Length; j > 0 && IsWhitespace(s[j - 1]); j--); 
            DiagnosticUtility.DebugAssert(j > i, "Logic error in XmlUtil.Trim()."); 

            if (i != 0 || j != s.Length) 
            {
                return s.Substring(i, j - i);
            }
            return s; 
        }
 
        public static void ParseQName(XmlReader reader, string qname, out string localName, out string ns) 
        {
            int index = qname.IndexOf(':'); 
            string prefix;
            if (index < 0)
            {
                prefix = ""; 
                localName = TrimStart(TrimEnd(qname));
            } 
            else 
            {
                if (index == qname.Length - 1) 
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.InvalidXmlQualifiedName, qname)));
                prefix = TrimStart(qname.Substring(0, index));
                localName = TrimEnd(qname.Substring(index + 1));
            } 
            ns = reader.LookupNamespace(prefix);
            if (ns == null) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.UnboundPrefixInQName, qname))); 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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