Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / ObjectListItemCollection.cs / 1305376 / ObjectListItemCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.ComponentModel; using System.Collections; using System.Diagnostics; using System.Web; using System.Web.UI; using System.Security.Permissions; namespace System.Web.UI.MobileControls { /* * Object List Item collection class. Does not derive from MobileListItemCollection, * because much of the functionality there is disallowed here. * * Copyright (c) 2000 Microsoft Corporation */ ///[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")] public class ObjectListItemCollection : ArrayListCollectionBase, IStateManager { private bool _marked = false; private bool _dirty = false; private ObjectList _owner; private int _baseIndex = 0; internal ObjectListItemCollection(ObjectList owner) { _owner = owner; } internal int BaseIndex { get { return _baseIndex; } set { _baseIndex = value; } } /// public ObjectListItem[] GetAll() { int n = Count; ObjectListItem[] result = new ObjectListItem[n]; if (n > 0) { Items.CopyTo (0, result, 0, n); } return result; } /// public ObjectListItem this[int index] { get { return (ObjectListItem)Items[index]; } } internal void Add(ObjectListItem item) { Items.Add (item); if (_marked) { _dirty = true; item.Dirty = true; } } /// public void Clear() { Items.Clear (); if (_marked) { _dirty = true; } } /// public bool Contains(ObjectListItem item) { return Items.Contains (item); } /// public int IndexOf(ObjectListItem item) { return Items.IndexOf(item); } ///////////////////////////////////////////////////////////////////////// // STATE MANAGEMENT ///////////////////////////////////////////////////////////////////////// /// protected bool IsTrackingViewState { get { return _marked; } } /// protected void TrackViewState() { _marked = true; foreach (IStateManager item in Items) { item.TrackViewState(); } } /// protected void LoadViewState(Object state) { if (state != null) { Object[] changes = (Object[])state; Debug.Assert (changes.Length == 2); if (changes[0] == null) { Clear (); } else { Object[] itemChanges = (Object[])changes[0]; EnsureCount (itemChanges.Length); int i = 0; foreach (IStateManager item in Items) { item.LoadViewState (itemChanges[i++]); } } int oldBaseIndex = BaseIndex; BaseIndex = (int)changes[1]; if (oldBaseIndex != BaseIndex) { int index = BaseIndex; foreach (ObjectListItem item in Items) { item.SetIndex(index++); } } } } /// protected Object SaveViewState() { if (!_dirty) { return null; } Object[] itemChanges; if (Count > 0) { itemChanges = new Object[Count]; int i = 0; foreach (IStateManager item in Items) { itemChanges[i++] = item.SaveViewState (); } } else { itemChanges = null; } if (itemChanges == null && BaseIndex == 0) { return null; } else { return new Object[2] { itemChanges, BaseIndex }; } } private void EnsureCount(int count) { int diff = Count - count; if (diff > 0) { Items.RemoveRange (count, diff); if (_marked) { _dirty = true; } } else { for (int i = Count; i < count; i++) { ObjectListItem item = new ObjectListItem(_owner); item.SetIndex(i + BaseIndex); Add (item); } } } #region Implementation of IStateManager /// bool IStateManager.IsTrackingViewState { get { return IsTrackingViewState; } } /// void IStateManager.LoadViewState(object state) { LoadViewState(state); } /// void IStateManager.TrackViewState() { TrackViewState(); } /// object IStateManager.SaveViewState() { return SaveViewState(); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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