Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / WebControls / DataKey.cs / 1305376 / DataKey.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.Collections.Specialized; using System.Diagnostics.CodeAnalysis; ////// public class DataKey : IStateManager, IEquatable{ private IOrderedDictionary _keyTable; private bool _isTracking; private string[] _keyNames; public DataKey(IOrderedDictionary keyTable) { _keyTable = keyTable; } public DataKey(IOrderedDictionary keyTable, string[] keyNames) : this(keyTable) { _keyNames = keyNames; } /// /// Inheritable overridable implementation of IsTrackingViewState /// protected virtual bool IsTrackingViewState { get { return _isTracking; } } public virtual object this[int index] { get { if (_keyTable != null) { return _keyTable[index]; } return null; } } public virtual object this[string name] { get { if (_keyTable != null) { return _keyTable[name]; } return null; } } public virtual object Value { get { if ((_keyTable != null) && (_keyTable.Count > 0)) { return _keyTable[0]; } return null; } } public virtual IOrderedDictionary Values { get { if (_keyTable == null) { return null; } if (_keyTable is OrderedDictionary) { return ((OrderedDictionary)_keyTable).AsReadOnly(); } // don't return the actual table because we don't want the user to mess with it. if (_keyTable is ICloneable) { return (IOrderedDictionary)((ICloneable)_keyTable).Clone(); } OrderedDictionary table = new OrderedDictionary(); foreach (DictionaryEntry entry in _keyTable) { table.Add(entry.Key, entry.Value); } return table.AsReadOnly(); } } ////// Inheritable overridable implementation of LoadViewState /// protected virtual void LoadViewState(object state) { if (state != null) { if (_keyNames != null) { object[] myState = (object[])state; // if we have key names, then we only stored values. if (myState[0] != null) { for (int i = 0; i < myState.Length && i < _keyNames.Length; i++) { _keyTable.Add(_keyNames[i], myState[i]); } } } else { if (state != null) { ArrayList stateArrayList = state as ArrayList; if (stateArrayList == null) { throw new HttpException(SR.GetString(SR.ViewState_InvalidViewState)); } OrderedDictionaryStateHelper.LoadViewState(_keyTable, stateArrayList); } } } } ////// Inheritable overridable implementation of SaveViewState /// protected virtual object SaveViewState() { int count = _keyTable.Count; if (count > 0) { object myState; if (_keyNames != null) { // if we have key names, then we only have to store values. myState = new object[count]; for (int i = 0; i < count; i++) { ((object[])myState)[i] = _keyTable[i]; } } else { myState = OrderedDictionaryStateHelper.SaveViewState(_keyTable); } return myState; } return null; } ////// Inheritable overridable implementation of TrackViewState /// protected virtual void TrackViewState() { _isTracking = true; } #region IStateManager implementation ///bool IStateManager.IsTrackingViewState { get { return IsTrackingViewState; } } /// void IStateManager.LoadViewState(object state) { LoadViewState(state); } /// object IStateManager.SaveViewState() { return SaveViewState(); } /// void IStateManager.TrackViewState() { TrackViewState(); } #endregion #region IEquatable Members [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] public bool Equals(DataKey other) { if (other == null) { return false; } string[] aKeys = _keyNames; string[] bKeys = other._keyNames; if (aKeys == null && _keyTable != null) { aKeys = new string[_keyTable.Count]; _keyTable.Keys.CopyTo(aKeys, 0); } if (bKeys == null && _keyTable != null) { bKeys = new string[other._keyTable.Count]; other._keyTable.Keys.CopyTo(bKeys, 0); } // Compare the keys array bool hasSameKeyNames = DataBoundControlHelper.CompareStringArrays(aKeys, bKeys); if (hasSameKeyNames) { if (aKeys != null && bKeys != null) { foreach (string key in aKeys) { if (!Object.Equals(this[key], other[key])) { return false; } } } return true; } return false; } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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