Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Sys / System / Configuration / SettingsPropertyValueCollection.cs / 1 / SettingsPropertyValueCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Configuration { using System.Collections; using System.Collections.Specialized; using System.Runtime.Serialization; using System.Configuration.Provider; using System.Globalization; using System.IO; using System.Runtime.Serialization.Formatters.Binary; using System.Xml.Serialization; using System.ComponentModel; using System.Security.Permissions; using System.Reflection; ////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////// public class SettingsPropertyValueCollection : IEnumerable, ICloneable, ICollection { private Hashtable _Indices = null; private ArrayList _Values = null; private bool _ReadOnly = false; //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public SettingsPropertyValueCollection() { _Indices = new Hashtable(10, CaseInsensitiveHashCodeProvider.Default, CaseInsensitiveComparer.Default); _Values = new ArrayList(); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void Add(SettingsPropertyValue property) { if (_ReadOnly) throw new NotSupportedException(); int pos = _Values.Add(property); try { _Indices.Add(property.Name, pos); } catch (Exception) { _Values.RemoveAt(pos); throw; } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void Remove(string name) { if (_ReadOnly) throw new NotSupportedException(); object pos = _Indices[name]; if (pos == null || !(pos is int)) return; int ipos = (int)pos; if (ipos >= _Values.Count) return; _Values.RemoveAt(ipos); _Indices.Remove(name); ArrayList al = new ArrayList(); foreach (DictionaryEntry de in _Indices) if ((int)de.Value > ipos) al.Add(de.Key); foreach (string key in al) _Indices[key] = ((int)_Indices[key]) - 1; } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public SettingsPropertyValue this[string name] { get { object pos = _Indices[name]; if (pos == null || !(pos is int)) return null; int ipos = (int)pos; if (ipos >= _Values.Count) return null; return (SettingsPropertyValue)_Values[ipos]; } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public IEnumerator GetEnumerator() { return _Values.GetEnumerator(); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public object Clone() { return new SettingsPropertyValueCollection(_Indices, _Values); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void SetReadOnly() { if (_ReadOnly) return; _ReadOnly = true; _Values = ArrayList.ReadOnly(_Values); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void Clear() { _Values.Clear(); _Indices.Clear(); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// // ICollection interface public int Count { get { return _Values.Count; } } public bool IsSynchronized { get { return false; } } public object SyncRoot { get { return this; } } public void CopyTo(Array array, int index) { _Values.CopyTo(array, index); } ///////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////// private SettingsPropertyValueCollection(Hashtable indices, ArrayList values) { _Indices = (Hashtable)indices.Clone(); _Values = (ArrayList)values.Clone(); } } }
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