Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/UI/WebControls/XmlHierarchicalEnumerable.cs

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+//------------------------------------------------------------------------------
+// <copyright file="XmlHierarchicalEnumerable.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Data;
+    using System.Drawing.Design;
+    using System.Text;
+    using System.Web;
+    using System.Web.UI;
+    using System.Xml;
+
+
+
+    /// <devdoc>
+    /// An enumerable representing a single level of an XmlHierarchicalDataSourceView.
+    /// </devdoc>
+    internal sealed class XmlHierarchicalEnumerable : IHierarchicalEnumerable {
+
+        private string _path;
+        private XmlNodeList _nodeList;
+
+        /// <devdoc>
+        /// Creates a new instance of XmlHierarchicalEnumerable.
+        /// </devdoc>
+        internal XmlHierarchicalEnumerable(XmlNodeList nodeList) {
+            _nodeList = nodeList;
+        }
+
+        internal string Path {
+            get {
+                return _path;
+            }
+            set {
+                _path = value;
+            }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() {
+            foreach (XmlNode node in _nodeList) {
+                if (node.NodeType == XmlNodeType.Element) {
+                    yield return new XmlHierarchyData(this, node);
+                }
+            }
+        }
+
+        IHierarchyData IHierarchicalEnumerable.GetHierarchyData(object enumeratedItem) {
+            return (IHierarchyData)enumeratedItem;
+        }
+    }
+}
+