Code:
/ DotNET / DotNET / 8.0 / 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
- ObjectSecurityT.cs
- WsatTransactionFormatter.cs
- BinaryFormatter.cs
- AttributeExtensions.cs
- IPPacketInformation.cs
- XmlLoader.cs
- IDictionary.cs
- TreeView.cs
- _LocalDataStore.cs
- UIElement.cs
- EUCJPEncoding.cs
- selecteditemcollection.cs
- ManagementPath.cs
- SkinBuilder.cs
- RsaSecurityTokenAuthenticator.cs
- SQLBytes.cs
- HttpCachePolicy.cs
- CheckBoxRenderer.cs
- Task.cs
- TransactionManager.cs
- ScrollableControl.cs
- ComPlusServiceHost.cs
- glyphs.cs
- TrustManagerPromptUI.cs
- TargetException.cs
- PriorityRange.cs
- DockingAttribute.cs
- Vertex.cs
- AlphabetConverter.cs
- LocalBuilder.cs
- XMLUtil.cs
- PKCS1MaskGenerationMethod.cs
- EventRouteFactory.cs
- WSHttpBinding.cs
- DataKeyArray.cs
- ISFTagAndGuidCache.cs
- RecordManager.cs
- HandleRef.cs
- Crc32Helper.cs
- SectionXmlInfo.cs
- ProjectedWrapper.cs
- MatchingStyle.cs
- DispatcherExceptionEventArgs.cs
- SystemWebSectionGroup.cs
- Socket.cs
- InfoCardBaseException.cs
- ToolStripSplitStackLayout.cs
- SpecialTypeDataContract.cs
- IndentedWriter.cs
- SdlChannelSink.cs
- XmlSchemaElement.cs
- OracleConnectionString.cs
- FillErrorEventArgs.cs
- WebPartConnectionsConfigureVerb.cs
- DBCSCodePageEncoding.cs
- HostedNamedPipeTransportManager.cs
- SlipBehavior.cs
- SupportingTokenDuplexChannel.cs
- EastAsianLunisolarCalendar.cs
- GACIdentityPermission.cs
- CompleteWizardStep.cs
- AuthenticationException.cs
- DataBindingExpressionBuilder.cs
- PropertyConverter.cs
- ClientSession.cs
- WebPartEditorApplyVerb.cs
- EventProviderTraceListener.cs
- ParameterReplacerVisitor.cs
- EventWaitHandle.cs
- SessionEndedEventArgs.cs
- QueryAccessibilityHelpEvent.cs
- MetadataCache.cs
- ToolStripItemImageRenderEventArgs.cs
- ObservableDictionary.cs
- GridViewDeleteEventArgs.cs
- safemediahandle.cs
- UnicodeEncoding.cs
- KeyGestureValueSerializer.cs
- XPathConvert.cs
- ServiceNameElement.cs
- MulticastDelegate.cs
- ConfigurationStrings.cs
- ExtendedPropertyCollection.cs
- ListBindingConverter.cs
- ComponentEditorPage.cs
- AttributeSetAction.cs
- ResizingMessageFilter.cs
- GlobalizationAssembly.cs
- SQLInt16Storage.cs
- CustomSignedXml.cs
- QuotedStringFormatReader.cs
- TextRangeEditTables.cs
- TypeValidationEventArgs.cs
- _SpnDictionary.cs
- SimplePropertyEntry.cs
- Stylesheet.cs
- _CacheStreams.cs
- HttpContext.cs
- ToolStripProgressBar.cs
- XmlEnumAttribute.cs