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
- InputReport.cs
- ValidationEventArgs.cs
- PassportPrincipal.cs
- MultiTrigger.cs
- RegexCapture.cs
- DecoderFallback.cs
- CipherData.cs
- LinkTarget.cs
- TheQuery.cs
- ObjectQuery.cs
- LoginDesigner.cs
- AddInController.cs
- __FastResourceComparer.cs
- EmbossBitmapEffect.cs
- StreamUpdate.cs
- EntryWrittenEventArgs.cs
- CorrelationResolver.cs
- ConnectionStringsExpressionBuilder.cs
- XsdSchemaFileEditor.cs
- HostedHttpContext.cs
- MiniCustomAttributeInfo.cs
- SpeakInfo.cs
- ProcessModelSection.cs
- TabControlAutomationPeer.cs
- TextEndOfParagraph.cs
- DownloadProgressEventArgs.cs
- Parallel.cs
- DataGridViewDataErrorEventArgs.cs
- TextElementCollectionHelper.cs
- PassportIdentity.cs
- DESCryptoServiceProvider.cs
- TextFormatterContext.cs
- BamlTreeUpdater.cs
- PackUriHelper.cs
- NestedContainer.cs
- DataFormats.cs
- DecoratedNameAttribute.cs
- milexports.cs
- Screen.cs
- OverlappedAsyncResult.cs
- DesignColumn.cs
- InstalledVoice.cs
- ErrorWebPart.cs
- SchemaCollectionPreprocessor.cs
- X509CertificateCollection.cs
- Trigger.cs
- ListBoxDesigner.cs
- RegionIterator.cs
- BindingExpression.cs
- UIElement3D.cs
- GlobalizationSection.cs
- CacheDependency.cs
- Roles.cs
- FixedSOMElement.cs
- ProtocolException.cs
- Rfc2898DeriveBytes.cs
- EventLogPermission.cs
- HwndMouseInputProvider.cs
- WebResourceAttribute.cs
- JavaScriptString.cs
- CodeBinaryOperatorExpression.cs
- ToolStripHighContrastRenderer.cs
- AsyncStreamReader.cs
- _SslSessionsCache.cs
- MessagingDescriptionAttribute.cs
- ParseElementCollection.cs
- MinimizableAttributeTypeConverter.cs
- DateRangeEvent.cs
- DataContractSet.cs
- DataColumnMappingCollection.cs
- BitmapEffectCollection.cs
- Region.cs
- HitTestWithPointDrawingContextWalker.cs
- SqlConnectionPoolGroupProviderInfo.cs
- ProcessHostMapPath.cs
- BinaryParser.cs
- TextElement.cs
- XmlDeclaration.cs
- DbParameterCollection.cs
- SoapAttributes.cs
- Selector.cs
- ContainerUIElement3D.cs
- RegexCode.cs
- TextViewSelectionProcessor.cs
- SamlSubject.cs
- StringKeyFrameCollection.cs
- IItemContainerGenerator.cs
- ToolboxDataAttribute.cs
- SetIterators.cs
- ProjectionPath.cs
- SqlConnectionString.cs
- WrapPanel.cs
- CookieParameter.cs
- UIElementParagraph.cs
- RequestResizeEvent.cs
- ApplicationId.cs
- ContractMethodInfo.cs
- TraceSection.cs
- SystemFonts.cs
- ObjectDataSourceSelectingEventArgs.cs