Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / Design / Serialization / ContextStack.cs / 1 / ContextStack.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.ComponentModel.Design.Serialization { using System; using System.Collections; using System.Security.Permissions; ////// A context stack is an object that can be used by serializers /// to push various context objects. Serialization is often /// a deeply nested operation, involving many different /// serialization classes. These classes often need additional /// context information when performing serialization. As /// an example, an object with a property named "Enabled" may have /// a data type of System.Boolean. If a serializer is writing /// this value to a data stream it may want to know what property /// it is writing. It won't have this information, however, because /// it is only instructed to write the boolean value. In this /// case the parent serializer may push a PropertyDescriptor /// pointing to the "Enabled" property on the context stack. /// What objects get pushed on this stack are up to the /// individual serializer objects. /// [HostProtection(SharedState = true)] [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Name = "FullTrust")] public sealed class ContextStack { private ArrayList contextStack; ////// Retrieves the current object on the stack, or null /// if no objects have been pushed. /// public object Current { get { if (contextStack != null && contextStack.Count > 0) { return contextStack[contextStack.Count - 1]; } return null; } } ////// Retrieves the object on the stack at the given /// level, or null if no object exists at that level. /// public object this[int level] { get { if (level < 0) { throw new ArgumentOutOfRangeException("level"); } if (contextStack != null && level < contextStack.Count) { return contextStack[contextStack.Count - 1 - level]; } return null; } } ////// Retrieves the first object on the stack that /// inherits from or implements the given type, or /// null if no object on the stack implements the type. /// public object this[Type type] { get { if (type == null) { throw new ArgumentNullException("type"); } if (contextStack != null) { int level = contextStack.Count; while(level > 0) { object value = contextStack[--level]; if (type.IsInstanceOfType(value)) { return value; } } } return null; } } ////// Appends an object to the end of the stack, rather than pushing it /// onto the top of the stack. This method allows a serializer to communicate /// with other serializers by adding contextual data that does not have to /// be popped in order. There is no way to remove an object that was /// appended to the end of the stack without popping all other objects. /// public void Append(object context) { if (context == null) { throw new ArgumentNullException("context"); } if (contextStack == null) { contextStack = new ArrayList(); } contextStack.Insert(0, context); } ////// Pops the current object off of the stack, returning /// its value. /// public object Pop() { object context = null; if (contextStack != null && contextStack.Count > 0) { int idx = contextStack.Count - 1; context = contextStack[idx]; contextStack.RemoveAt(idx); } return context; } ////// Pushes the given object onto the stack. /// public void Push(object context) { if (context == null) { throw new ArgumentNullException("context"); } if (contextStack == null) { contextStack = new ArrayList(); } contextStack.Add(context); } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- VisualBasicReference.cs
- SwitchLevelAttribute.cs
- DTCTransactionManager.cs
- XmlWriterTraceListener.cs
- TextEditorCopyPaste.cs
- StateMachineWorkflow.cs
- TcpProcessProtocolHandler.cs
- BamlResourceContent.cs
- TextElementEnumerator.cs
- IImplicitResourceProvider.cs
- LocatorPart.cs
- ResourceProperty.cs
- ExpressionList.cs
- HttpHandlersSection.cs
- HttpRawResponse.cs
- DataControlImageButton.cs
- ClientScriptItem.cs
- DataGridRowClipboardEventArgs.cs
- SharedUtils.cs
- WpfPayload.cs
- ProfileService.cs
- PipeSecurity.cs
- ApplicationFileCodeDomTreeGenerator.cs
- XPathDescendantIterator.cs
- CssClassPropertyAttribute.cs
- ArrayListCollectionBase.cs
- Parameter.cs
- ObsoleteAttribute.cs
- MsmqMessage.cs
- ContainsRowNumberChecker.cs
- RuleSettingsCollection.cs
- IntegerValidator.cs
- MemberCollection.cs
- ProcessActivityTreeOptions.cs
- OracleCommandSet.cs
- NativeWrapper.cs
- SortedList.cs
- LoginUtil.cs
- ListenerSessionConnection.cs
- XmlSchemas.cs
- FormClosedEvent.cs
- GeometryCollection.cs
- ChtmlLinkAdapter.cs
- IsolatedStorageException.cs
- HyperLinkField.cs
- CfgParser.cs
- TextEditorCopyPaste.cs
- CodeBlockBuilder.cs
- CharacterString.cs
- BStrWrapper.cs
- AmbientProperties.cs
- ErrorHandler.cs
- DBSchemaRow.cs
- XmlSchemaObjectCollection.cs
- DataGridViewTextBoxCell.cs
- HtmlShimManager.cs
- basemetadatamappingvisitor.cs
- DefaultValueMapping.cs
- SQLCharsStorage.cs
- PartitionerQueryOperator.cs
- QueryContinueDragEvent.cs
- MetadataCollection.cs
- PersonalizationEntry.cs
- StringUtil.cs
- TemplateBindingExtensionConverter.cs
- SqlUserDefinedTypeAttribute.cs
- EnumType.cs
- ToolStripActionList.cs
- OperationFormatStyle.cs
- DecoderReplacementFallback.cs
- SystemMulticastIPAddressInformation.cs
- Rect3D.cs
- TreeNodeCollection.cs
- SerTrace.cs
- SQLBinary.cs
- HelpEvent.cs
- LingerOption.cs
- NavigationEventArgs.cs
- StylusTip.cs
- DatagridviewDisplayedBandsData.cs
- SerialStream.cs
- ConditionalAttribute.cs
- ToolboxComponentsCreatedEventArgs.cs
- SqlDataAdapter.cs
- WhitespaceRuleLookup.cs
- EncryptedXml.cs
- Binding.cs
- CollectionType.cs
- PreservationFileWriter.cs
- ProgressiveCrcCalculatingStream.cs
- ContentElementAutomationPeer.cs
- SystemInformation.cs
- XmlDataSourceDesigner.cs
- CodeDelegateCreateExpression.cs
- EdmMember.cs
- ApplicationServicesHostFactory.cs
- SpeechSynthesizer.cs
- TrustLevelCollection.cs
- XPathNavigator.cs
- Base64Encoding.cs