Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Sys / System / Configuration / SettingsPropertyCollection.cs / 1 / SettingsPropertyCollection.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; //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public class SettingsPropertyCollection : IEnumerable, ICloneable, ICollection { private Hashtable _Hashtable = null; private bool _ReadOnly = false; //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public SettingsPropertyCollection() { _Hashtable = new Hashtable(10, CaseInsensitiveHashCodeProvider.Default, CaseInsensitiveComparer.Default); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void Add(SettingsProperty property) { if (_ReadOnly) throw new NotSupportedException(); OnAdd(property); _Hashtable.Add(property.Name, property); try { OnAddComplete(property); } catch { _Hashtable.Remove(property.Name); throw; } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void Remove(string name) { if (_ReadOnly) throw new NotSupportedException(); SettingsProperty toRemove = (SettingsProperty)_Hashtable[name]; if (toRemove == null) return; OnRemove(toRemove); _Hashtable.Remove(name); try { OnRemoveComplete(toRemove); } catch { _Hashtable.Add(name, toRemove); throw; } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public SettingsProperty this[string name] { get { return _Hashtable[name] as SettingsProperty; } } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public IEnumerator GetEnumerator() { return _Hashtable.Values.GetEnumerator(); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public object Clone() { return new SettingsPropertyCollection(_Hashtable); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void SetReadOnly() { if (_ReadOnly) return; _ReadOnly = true; } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// public void Clear() { if (_ReadOnly) throw new NotSupportedException(); OnClear(); _Hashtable.Clear(); OnClearComplete(); } //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// // On* Methods for deriving classes to override. These have // been modeled after the CollectionBase class but have // been stripped of their "index" parameters as there is no // visible index to this collection. protected virtual void OnAdd(SettingsProperty property) {} protected virtual void OnAddComplete(SettingsProperty property) {} protected virtual void OnClear() {} protected virtual void OnClearComplete() {} protected virtual void OnRemove(SettingsProperty property) {} protected virtual void OnRemoveComplete(SettingsProperty property) {} //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// // ICollection interface public int Count { get { return _Hashtable.Count; } } public bool IsSynchronized { get { return false; } } public object SyncRoot { get { return this; } } public void CopyTo(Array array, int index) { _Hashtable.Values.CopyTo(array, index); } ///////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////// private SettingsPropertyCollection(Hashtable h) { _Hashtable = (Hashtable)h.Clone(); } } }
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