Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / 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; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- InvokeHandlers.cs
- MouseDevice.cs
- BinaryObjectReader.cs
- TextInfo.cs
- StrokeNodeData.cs
- TypeConverterValueSerializer.cs
- CodeDelegateCreateExpression.cs
- EntryWrittenEventArgs.cs
- SqlDataSourceEnumerator.cs
- SoapEnumAttribute.cs
- CallbackValidator.cs
- MenuRendererClassic.cs
- CellParagraph.cs
- AudioFileOut.cs
- BaseParser.cs
- WsdlImporter.cs
- ObjectParameterCollection.cs
- TypeBrowser.xaml.cs
- HideDisabledControlAdapter.cs
- LabelLiteral.cs
- BamlStream.cs
- Attributes.cs
- SymDocumentType.cs
- Slider.cs
- GuidelineCollection.cs
- ClockGroup.cs
- SspiSafeHandles.cs
- PluralizationService.cs
- Debugger.cs
- CodeDelegateCreateExpression.cs
- InvokePatternIdentifiers.cs
- Utils.cs
- DataGridLinkButton.cs
- SafeArchiveContext.cs
- ConfigurationValidatorAttribute.cs
- GlobalizationSection.cs
- SslStreamSecurityBindingElement.cs
- ColorMap.cs
- ItemCollection.cs
- ConnectionPointCookie.cs
- WorkflowLayouts.cs
- OleAutBinder.cs
- ChangeProcessor.cs
- SmtpClient.cs
- CorrelationManager.cs
- LinkButton.cs
- GregorianCalendarHelper.cs
- DragEventArgs.cs
- OracleException.cs
- WorkflowApplicationTerminatedException.cs
- WebBrowserSiteBase.cs
- ExtenderHelpers.cs
- HttpCacheVaryByContentEncodings.cs
- SizeConverter.cs
- TransformedBitmap.cs
- DynamicEntity.cs
- WebPartExportVerb.cs
- NameValueFileSectionHandler.cs
- NegotiationTokenAuthenticatorState.cs
- SplineQuaternionKeyFrame.cs
- SoapException.cs
- InputLanguage.cs
- BitmapEffectDrawing.cs
- CommandEventArgs.cs
- ComponentEditorPage.cs
- TcpStreams.cs
- Fx.cs
- Transform.cs
- FrameworkContentElement.cs
- CellNormalizer.cs
- QueryParameter.cs
- SmtpTransport.cs
- AsyncResult.cs
- _ListenerResponseStream.cs
- TextPointer.cs
- DrawItemEvent.cs
- DropShadowBitmapEffect.cs
- CodeSnippetStatement.cs
- SqlStream.cs
- OverloadGroupAttribute.cs
- Socket.cs
- Buffer.cs
- TheQuery.cs
- Knowncolors.cs
- TCPClient.cs
- EdmProviderManifest.cs
- XmlExpressionDumper.cs
- ChildrenQuery.cs
- ProfileInfo.cs
- ArrayList.cs
- Metafile.cs
- _IPv6Address.cs
- DocumentPageView.cs
- XmlDocumentSerializer.cs
- ContextProperty.cs
- LambdaCompiler.cs
- DataSourceControl.cs
- PrivacyNoticeElement.cs
- ViewManager.cs
- RoleGroup.cs