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