Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/DataKeyArray.cs

@@ -0,0 +1,157 @@
+//------------------------------------------------------------------------------
+// <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
+    }
+}
+