XmlNamespaceMappingCollection.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Data / XmlNamespaceMappingCollection.cs / 2 / XmlNamespaceMappingCollection.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: Implementation of XmlNamespaceMappingCollection object. 
// 
// Specs:       [....]/connecteddata/M5%20Specs/XmlDataSource.mht
//              [....]/connecteddata/M5%20Specs/WCP%20DataSources.mht 
//
//---------------------------------------------------------------------------

using System; 
using System.Collections; // IEnumerator
using System.Collections.Generic; // ICollection 
using System.Xml; 
using System.Windows.Markup;
using MS.Utility; 

namespace System.Windows.Data
{
    ///  
    /// XmlNamespaceMappingCollection Class
    /// Used to declare namespaces to be used in Xml data binding XPath queries 
    ///  
    [Localizability(LocalizationCategory.NeverLocalize)]
    public class XmlNamespaceMappingCollection : XmlNamespaceManager, ICollection, IAddChildInternal 
    {
        /// 
        /// Constructor
        ///  
        public XmlNamespaceMappingCollection() : base(new NameTable())
        {} 
 
#region IAddChild
 
        /// 
        /// IAddChild implementation
        /// 
        ///  
        /// 
        void IAddChild.AddChild(object value) 
        { 
            AddChild(value);
        } 

        /// 
        /// IAddChild implementation
        ///  
        /// 
        protected virtual void AddChild(object value) 
        { 
            XmlNamespaceMapping mapping = value as XmlNamespaceMapping;
            if (mapping == null) 
                throw new ArgumentException(SR.Get(SRID.RequiresXmlNamespaceMapping, value.GetType().FullName), "value");

            Add(mapping);
        } 

        ///  
        /// IAddChild implementation 
        /// 
        ///  
        void IAddChild.AddText(string text)
        {
            AddText(text);
        } 

        ///  
        /// IAddChild implementation 
        /// 
        ///  
        protected virtual void AddText(string text)
        {
            if (text == null)
                throw new ArgumentNullException("text"); 

            XamlSerializerUtil.ThrowIfNonWhiteSpaceInAddText(text, this); 
        } 

#endregion 

#region ICollection

        ///  
        /// Add XmlNamespaceMapping
        ///  
        /// mapping is null 
        public void Add(XmlNamespaceMapping mapping)
        { 
            if (mapping == null)
                throw new ArgumentNullException("mapping");

            if (mapping.Uri == null) 
                throw new ArgumentException(SR.Get(SRID.RequiresXmlNamespaceMappingUri), "mapping");
 
            // 

            this.AddNamespace(mapping.Prefix, mapping.Uri.OriginalString); 
        }

        /// 
        /// Remove all XmlNamespaceMappings 
        /// 
        ///  
        /// This is potentially an expensive operation. 
        /// It may be cheaper to simply create a new XmlNamespaceMappingCollection.
        ///  
        public void Clear()
        {
            int count = Count;
            XmlNamespaceMapping[] array = new XmlNamespaceMapping[count]; 
            CopyTo(array, 0);
            for (int i = 0; i < count; ++i) 
            { 
                Remove(array[i]);
            } 
        }

        /// 
        /// Add XmlNamespaceMapping 
        /// 
        /// mapping is null 
        public bool Contains(XmlNamespaceMapping mapping) 
        {
            if (mapping == null) 
                throw new ArgumentNullException("mapping");

            if (mapping.Uri == null)
                throw new ArgumentException(SR.Get(SRID.RequiresXmlNamespaceMappingUri), "mapping"); 

            return (this.LookupNamespace(mapping.Prefix) == mapping.Uri.OriginalString); 
        } 

        ///  
        /// Copy XmlNamespaceMappings to array
        /// 
        public void CopyTo(XmlNamespaceMapping[] array, int arrayIndex)
        { 
            if (array == null)
                throw new ArgumentNullException("array"); 
 
            int i = arrayIndex;
            int maxLength = array.Length; 
            foreach (XmlNamespaceMapping mapping in this)
            {
                if (i >= maxLength)
                    throw new ArgumentException(SR.Get(SRID.Collection_CopyTo_NumberOfElementsExceedsArrayLength, "arrayIndex", "array")); 
                array[i] = mapping;
                ++ i; 
            } 
        }
 
        /// 
        /// Remove XmlNamespaceMapping
        /// 
        ///  
        /// true if the mapping was removed
        ///  
        /// mapping is null 
        public bool Remove(XmlNamespaceMapping mapping)
        { 
            if (mapping == null)
                throw new ArgumentNullException("mapping");

            if (mapping.Uri == null) 
                throw new ArgumentException(SR.Get(SRID.RequiresXmlNamespaceMappingUri), "mapping");
 
            if (Contains(mapping)) 
            {
                this.RemoveNamespace(mapping.Prefix, mapping.Uri.OriginalString); 
                return true;
            }
            return false;
        } 

        ///  
        /// Count of the number of XmlNamespaceMappings 
        /// 
        public int Count 
        {
            get
            {
                int count = 0; 
                foreach (XmlNamespaceMapping mapping in this)
                { 
                    ++ count; 
                }
                return count; 
            }
        }

        ///  
        /// Value to indicate if this collection is read only
        ///  
        public bool IsReadOnly 
        {
            get { return false; } 
        }

        /// 
        /// IEnumerable implementation. 
        /// 
        ///  
        /// This enables the serializer to serialize the contents of the XmlNamespaceMappingCollection. 
        /// The default namespaces (xnm, xml, and string.Empty) are not included in this enumeration.
        ///  
        public override IEnumerator GetEnumerator()
        {
            return ProtectedGetEnumerator();
        } 

        ///  
        /// IEnumerable (generic) implementation. 
        /// 
        IEnumerator IEnumerable.GetEnumerator() 
        {
            return ProtectedGetEnumerator();
        }
 
        /// 
        /// Protected member for use by IEnumerable implementations. 
        ///  
        protected IEnumerator ProtectedGetEnumerator()
        { 
            IEnumerator enumerator = BaseEnumerator;

            while (enumerator.MoveNext())
            { 
                string prefix = (string) enumerator.Current;
                // ignore the default namespaces added automatically in the XmlNamespaceManager 
                if (prefix == "xmlns" || prefix == "xml") 
                    continue;
                string ns = this.LookupNamespace(prefix); 
                // ignore the empty prefix if the namespace has not been reassigned
                if ((prefix == string.Empty) && (ns == string.Empty))
                    continue;
 
                Uri uri = new Uri(ns, UriKind.RelativeOrAbsolute);
                XmlNamespaceMapping xnm = new XmlNamespaceMapping(prefix, uri); 
 
                yield return xnm;
            } 
        }

        // The iterator above cannot access base.GetEnumerator directly - this
        // causes build warning 1911, and makes MoveNext throw a security 
        // exception under partial trust (bug 1785518).  Accessing it indirectly
        // through this property fixes the problem. 
        private IEnumerator BaseEnumerator 
        {
            get { return base.GetEnumerator(); } 
        }

#endregion ICollection
 
    }
} 
 

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