XmlAttributeHolder.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / XmlAttributeHolder.cs / 1305376 / XmlAttributeHolder.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.IdentityModel 
{
    using System.Xml; 
 
    struct XmlAttributeHolder
    { 
        string prefix;
        string ns;
        string localName;
        string value; 

        public static XmlAttributeHolder[] emptyArray = new XmlAttributeHolder[0]; 
 
        public XmlAttributeHolder(string prefix, string localName, string ns, string value)
        { 
            this.prefix = prefix;
            this.localName = localName;
            this.ns = ns;
            this.value = value; 
        }
 
        public string Prefix 
        {
            get { return prefix; } 
        }

        public string NamespaceUri
        { 
            get { return ns; }
        } 
 
        public string LocalName
        { 
            get { return localName; }
        }

        public string Value 
        {
            get { return value; } 
        } 

        public void WriteTo(XmlWriter writer) 
        {
            writer.WriteStartAttribute(prefix, localName, ns);
            writer.WriteString(value);
            writer.WriteEndAttribute(); 
        }
 
        public static void WriteAttributes(XmlAttributeHolder[] attributes, XmlWriter writer) 
        {
            for (int i = 0; i < attributes.Length; i++) 
                attributes[i].WriteTo(writer);
        }

        public static XmlAttributeHolder[] ReadAttributes(XmlDictionaryReader reader) 
        {
            int maxSizeOfHeaders = int.MaxValue; 
            return ReadAttributes(reader, ref maxSizeOfHeaders); 
        }
 
        public static XmlAttributeHolder[] ReadAttributes(XmlDictionaryReader reader, ref int maxSizeOfHeaders)
        {
            if (reader.AttributeCount == 0)
                return emptyArray; 
            XmlAttributeHolder[] attributes = new XmlAttributeHolder[reader.AttributeCount];
            reader.MoveToFirstAttribute(); 
            for (int i = 0; i < attributes.Length; i++) 
            {
                string ns = reader.NamespaceURI; 
                string localName = reader.LocalName;
                string prefix = reader.Prefix;
                string value = string.Empty;
                while (reader.ReadAttributeValue()) 
                {
                    if (value.Length == 0) 
                        value = reader.Value; 
                    else
                        value += reader.Value; 
                }
                Deduct(prefix, ref maxSizeOfHeaders);
                Deduct(localName, ref maxSizeOfHeaders);
                Deduct(ns, ref maxSizeOfHeaders); 
                Deduct(value, ref maxSizeOfHeaders);
                attributes[i] = new XmlAttributeHolder(prefix, localName, ns, value); 
                reader.MoveToNextAttribute(); 
            }
            reader.MoveToElement(); 
            return attributes;
        }

        static void Deduct(string s, ref int maxSizeOfHeaders) 
        {
            int byteCount = s.Length * sizeof(char); 
            if (byteCount > maxSizeOfHeaders) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.XmlBufferQuotaExceeded))); 
            }
            maxSizeOfHeaders -= byteCount;
        }
 
        public static string GetAttribute(XmlAttributeHolder[] attributes, string localName, string ns)
        { 
            for (int i = 0; i < attributes.Length; i++) 
                if (attributes[i].LocalName == localName && attributes[i].NamespaceUri == ns)
                    return attributes[i].Value; 
            return null;
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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