Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / XmlHierarchyData.cs / 2 / XmlHierarchyData.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing.Design; using System.Globalization; using System.Text; using System.Web; using System.Web.UI; using System.Xml; using AttributeCollection = System.ComponentModel.AttributeCollection; ////// Represents the data associated with a single hierarchy item - in this case an XmlNode. /// internal sealed class XmlHierarchyData : IHierarchyData, ICustomTypeDescriptor { private XmlNode _item; private XmlHierarchicalEnumerable _parent; private string _path; ////// Create a new instance of XmlHierarchyData. /// internal XmlHierarchyData(XmlHierarchicalEnumerable parent, XmlNode item) { _parent = parent; _item = item; } ////// Creates a path to a given XmlNode from the root using XPath. /// private string CreateRecursivePath(XmlNode node) { if (node.ParentNode == null) return String.Empty; return CreateRecursivePath(node.ParentNode) + FindNodePosition(node); } ////// Finds a node's position relative to its parent. /// private string FindNodePosition(XmlNode node) { XmlNodeList nodeList = node.ParentNode.ChildNodes; int index = 0; for (int i = 0; i < nodeList.Count; i++) { // Position only considers elements, not other node types if (nodeList[i].NodeType == XmlNodeType.Element) index++; if (nodeList[i] == node) return "/*[position()=" + Convert.ToString(index, CultureInfo.InvariantCulture) + "]"; } throw new ArgumentException(SR.GetString(SR.XmlHierarchyData_CouldNotFindNode)); } public override string ToString() { return _item.Name; } bool IHierarchyData.HasChildren { get { return _item.HasChildNodes; } } object IHierarchyData.Item { get { return _item; } } string IHierarchyData.Path { get { if (_path == null) { // If we don't yet have a path, create one and cache it if (_parent != null) { // If we have a parent enumerable, then our path is the parent's // path plus our position within that parent. if (_parent.Path == null) { _parent.Path = CreateRecursivePath(_item.ParentNode); } _path = _parent.Path + FindNodePosition(_item); } else { // If we are not associated with a parent enumerable, we // have to build up our entire path from scratch. _path = CreateRecursivePath(_item); } } return _path; } } string IHierarchyData.Type { get { return _item.Name; } } IHierarchicalEnumerable IHierarchyData.GetChildren() { return new XmlHierarchicalEnumerable(_item.ChildNodes); } IHierarchyData IHierarchyData.GetParent() { XmlNode parentNode = _item.ParentNode; if (parentNode == null) return null; return new XmlHierarchyData(null, parentNode); } AttributeCollection ICustomTypeDescriptor.GetAttributes() { return AttributeCollection.Empty; } string ICustomTypeDescriptor.GetClassName() { return GetType().Name; } string ICustomTypeDescriptor.GetComponentName() { return null; } TypeConverter ICustomTypeDescriptor.GetConverter() { return null; } EventDescriptor ICustomTypeDescriptor.GetDefaultEvent() { return null; } PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty() { return new XmlHierarchyDataPropertyDescriptor("#Name"); } object ICustomTypeDescriptor.GetEditor(Type editorBaseType) { return null; } EventDescriptorCollection ICustomTypeDescriptor.GetEvents() { return null; } EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attrs) { return null; } PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties() { return ((ICustomTypeDescriptor)this).GetProperties(null); } PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attrFilter) { System.Collections.Generic.Listlist = new System.Collections.Generic.List (); list.Add(new XmlHierarchyDataPropertyDescriptor("#Name")); list.Add(new XmlHierarchyDataPropertyDescriptor("#Value")); list.Add(new XmlHierarchyDataPropertyDescriptor("#InnerText")); XmlAttributeCollection attrs = _item.Attributes; if (attrs != null) { for (int i = 0; i < attrs.Count; i++) { list.Add(new XmlHierarchyDataPropertyDescriptor(attrs[i].Name)); } } return new PropertyDescriptorCollection(list.ToArray()); } object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd) { if (pd is XmlHierarchyDataPropertyDescriptor) { return this; } return null; } private class XmlHierarchyDataPropertyDescriptor : PropertyDescriptor { private string _name; public XmlHierarchyDataPropertyDescriptor(string name) : base(name, null) { _name = name; } public override Type ComponentType { get { return typeof(XmlHierarchyData); } } public override bool IsReadOnly { get { return true; } } public override Type PropertyType { get { return typeof(string); } } public override bool CanResetValue(object o) { return false; } public override object GetValue(object o) { XmlHierarchyData data = o as XmlHierarchyData; if (data != null) { switch (_name) { case "#Name": return data._item.Name; case "#Value": return data._item.Value; case "#InnerText": return data._item.InnerText; default: XmlAttributeCollection attrs = data._item.Attributes; if (attrs != null) { XmlAttribute attr = attrs[_name]; if (attr != null) { return attr.Value; } } break; } } return String.Empty; } public override void ResetValue(object o) { return; } public override void SetValue(object o, object value) { } public override bool ShouldSerializeValue(object o) { return true; } } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- keycontainerpermission.cs
- COM2Properties.cs
- SymbolPair.cs
- XPathNavigatorKeyComparer.cs
- CommandID.cs
- CodeSnippetCompileUnit.cs
- OperationDescriptionCollection.cs
- OpenTypeLayout.cs
- ScriptMethodAttribute.cs
- Point3DCollectionConverter.cs
- FontResourceCache.cs
- ImmutablePropertyDescriptorGridEntry.cs
- SystemShuttingDownException.cs
- CuspData.cs
- WebPartChrome.cs
- Latin1Encoding.cs
- ProxyWebPart.cs
- HtmlInputPassword.cs
- SettingsProperty.cs
- Delay.cs
- diagnosticsswitches.cs
- TreeViewDesigner.cs
- ListViewItem.cs
- ProfileSection.cs
- PolicyUtility.cs
- RIPEMD160Managed.cs
- NameService.cs
- hresults.cs
- LinqDataSourceEditData.cs
- LinqDataSourceStatusEventArgs.cs
- TreeNodeBindingCollection.cs
- ConnectionsZoneAutoFormat.cs
- CodeTypeDeclarationCollection.cs
- dataprotectionpermission.cs
- PagedDataSource.cs
- RoutedEventArgs.cs
- ClusterRegistryConfigurationProvider.cs
- MenuItemStyleCollection.cs
- _RequestLifetimeSetter.cs
- UpdatePanelControlTrigger.cs
- XomlSerializationHelpers.cs
- AttachedPropertyBrowsableAttribute.cs
- ConnectionManagementSection.cs
- WindowsRichEditRange.cs
- UInt16Storage.cs
- DataGridViewRowEventArgs.cs
- QueueProcessor.cs
- ItemType.cs
- TransactionInformation.cs
- ProviderBase.cs
- IPipelineRuntime.cs
- XmlQueryTypeFactory.cs
- ResourceDisplayNameAttribute.cs
- OutOfProcStateClientManager.cs
- BitmapPalette.cs
- SiteMapNodeItemEventArgs.cs
- ConfigurationLockCollection.cs
- DataTableNewRowEvent.cs
- TreeViewEvent.cs
- FixedHyperLink.cs
- WebPermission.cs
- TargetInvocationException.cs
- BackgroundWorker.cs
- WebPartConnectionsDisconnectVerb.cs
- PlatformCulture.cs
- MailMessageEventArgs.cs
- BitmapImage.cs
- PasswordDeriveBytes.cs
- EntityReference.cs
- WindowInteropHelper.cs
- Model3D.cs
- ClaimTypes.cs
- JavaScriptString.cs
- ByteAnimation.cs
- ProfileSection.cs
- Table.cs
- WindowsMenu.cs
- TCPListener.cs
- PlanCompiler.cs
- ServiceOperation.cs
- XmlEventCache.cs
- StructuralType.cs
- FormViewDeletedEventArgs.cs
- TypeLibConverter.cs
- ProfileGroupSettingsCollection.cs
- TransactionProtocolConverter.cs
- Int32KeyFrameCollection.cs
- UserControlParser.cs
- WebPartExportVerb.cs
- ServiceChannelProxy.cs
- OdbcEnvironment.cs
- CookieParameter.cs
- TextTreeRootNode.cs
- EntityDataSourceReferenceGroup.cs
- NTAccount.cs
- JournalEntryStack.cs
- TimerElapsedEvenArgs.cs
- TrackingStringDictionary.cs
- XmlChoiceIdentifierAttribute.cs
- StateManagedCollection.cs