158 lines
4.6 KiB
C#
158 lines
4.6 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="DataKeyArray.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.UI.WebControls {
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using System;
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using System.Collections;
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/// <devdoc>
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/// </devdoc>
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public sealed class DataKeyArray : ICollection, IStateManager {
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private ArrayList _keys;
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private bool _isTracking;
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/// <devdoc>
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/// <para>Initializes a new instance of the <see cref='System.Web.UI.WebControls.DataKeyArray'/> class.</para>
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/// </devdoc>
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public DataKeyArray(ArrayList keys) {
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this._keys = keys;
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}
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/// <devdoc>
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/// <para>Gets the number of objects in the collection. This property is read-only.</para>
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/// </devdoc>
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public int Count {
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get {
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return _keys.Count;
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}
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}
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/// <devdoc>
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/// <para>Gets the value that specifies whether items in the <see cref='System.Web.UI.WebControls.DataKeyArray'/> can be
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/// modified. This property is read-only.</para>
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/// </devdoc>
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public bool IsReadOnly {
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get {
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return false;
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}
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}
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/// <devdoc>
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/// <para>Gets a value that indicates whether the <see cref='System.Web.UI.WebControls.DataKeyArray'/> is
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/// thread-safe. This property is read-only.</para>
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/// </devdoc>
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public bool IsSynchronized {
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get {
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return false;
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}
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}
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/// <devdoc>
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/// <para>Gets the object used to synchronize access to the collection. This property is read-only. </para>
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/// </devdoc>
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public object SyncRoot {
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get {
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return this;
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}
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}
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/// <devdoc>
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/// <para>Gets a <see cref='DataKey' qualify='true'/> at the specified index in the collection. This property is read-only.</para>
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/// </devdoc>
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public DataKey this[int index] {
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get {
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return _keys[index] as DataKey;
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}
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}
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/// <devdoc>
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/// <para>Copies the contents of the entire collection into an <see cref='System.Array' qualify='true'/> appending at
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/// the specified index of the <see cref='System.Array' qualify='true'/>.</para>
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/// </devdoc>
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public void CopyTo(DataKey[] array, int index) {
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((ICollection)this).CopyTo(array, index);
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}
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/// <internalonly/>
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void ICollection.CopyTo(Array array, int index) {
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for (IEnumerator e = this.GetEnumerator(); e.MoveNext();)
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array.SetValue(e.Current, index++);
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}
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/// <devdoc>
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/// <para>Creates an enumerator for the <see cref='System.Web.UI.WebControls.DataKeyArray'/> used to iterate
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/// through the collection.</para>
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/// </devdoc>
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public IEnumerator GetEnumerator() {
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return _keys.GetEnumerator();
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}
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#region IStateManager implementation
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/// <internalonly/>
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bool IStateManager.IsTrackingViewState {
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get {
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return _isTracking;
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}
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}
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/// <internalonly/>
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void IStateManager.LoadViewState(object state) {
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if (state != null) {
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object[] keysState = (object[])state;
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for (int i = 0; i < keysState.Length; i++) {
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if (keysState[i] != null) {
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((IStateManager)_keys[i]).LoadViewState(keysState[i]);
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}
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}
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}
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}
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/// <internalonly/>
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object IStateManager.SaveViewState() {
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int keyCount = _keys.Count;
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object[] keysState = new object[keyCount];
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bool savedState = false;
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for (int i = 0; i < keyCount; i++) {
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keysState[i] = ((IStateManager)_keys[i]).SaveViewState();
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if (keysState[i] != null)
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savedState = true;
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}
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return savedState ? keysState : null;
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}
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/// <internalonly/>
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void IStateManager.TrackViewState() {
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_isTracking = true;
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int keyCount = _keys.Count;
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for (int i = 0; i < keyCount; i++) {
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((IStateManager)_keys[i]).TrackViewState();
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}
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}
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#endregion
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}
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}
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