Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Shared / MS / Internal / DecoderFallbackWithFailureFlag.cs / 1 / DecoderFallbackWithFailureFlag.cs
//---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // Description: DecoderFallbackWithFailureFlag is used when the developer wants Encoding.GetChars() method to fail // without throwing an exception when decoding cannot be performed. // Usage pattern is: // DecoderFallbackWithFailureFlag fallback = new DecoderFallbackWithFailureFlag(); // Encoding e = Encoding.GetEncoding(codePage, EncoderFallback.ExceptionFallback, fallback); // e.GetChars(bytesToDecode); // if (fallback.HasFailed) // { // // Perform fallback and reset the failure flag. // fallback.HasFailed = false; // } // // History: // 05/03/2005 : [....] - Created // //--------------------------------------------------------------------------- using System.Text; namespace MS.Internal { ////// This class is similar to the standard DecoderExceptionFallback class, /// except that for performance reasons it sets a Boolean failure flag /// instead of throwing exception. /// internal class DecoderFallbackWithFailureFlag : DecoderFallback { public DecoderFallbackWithFailureFlag() { } public override DecoderFallbackBuffer CreateFallbackBuffer() { return new FallbackBuffer(this); } ////// The maximum number of characters this instance can return. /// public override int MaxCharCount { get { return 0; } } ////// Returns whether decoding failed. /// public bool HasFailed { get { return _hasFailed; } set { _hasFailed = value; } } private bool _hasFailed; // false by default ////// A special implementation of DecoderFallbackBuffer that sets the failure flag /// in the parent DecoderFallbackWithFailureFlag class. /// private class FallbackBuffer : DecoderFallbackBuffer { public FallbackBuffer(DecoderFallbackWithFailureFlag parent) { _parent = parent; } ////// Indicates whether a substitute string can be emitted if an input byte sequence cannot be decoded. /// Parameters specify an input byte sequence, and the index position of a byte in the input. /// /// An input array of bytes. /// The index position of a byte in bytesUnknown. ///true if a string exists that can be inserted in the output /// instead of decoding the byte specified in bytesUnknown; /// false if the input byte should be ignored. public override bool Fallback(byte[] bytesUnknown, int index) { _parent.HasFailed = true; return false; } ////// Retrieves the next character in the fallback buffer. /// ///The next Unicode character in the fallback buffer. public override char GetNextChar() { return (char)0; } ////// Prepares the GetNextChar method to retrieve the preceding character in the fallback buffer. /// ///true if the MovePrevious operation was successful; otherwise, false. public override bool MovePrevious() { return false; } ////// Gets the number of characters in this instance of DecoderFallbackBuffer that remain to be processed. /// public override int Remaining { get { return 0; } } private DecoderFallbackWithFailureFlag _parent; } } } // 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
- Help.cs
- XappLauncher.cs
- StandardCommands.cs
- CodePrimitiveExpression.cs
- RangeValidator.cs
- SqlResolver.cs
- AssemblyHash.cs
- _LocalDataStoreMgr.cs
- SoapConverter.cs
- ResourceProviderFactory.cs
- ExponentialEase.cs
- DataServiceRequestArgs.cs
- DataControlField.cs
- ConfigPathUtility.cs
- BStrWrapper.cs
- UnmanagedMemoryStreamWrapper.cs
- ISAPIApplicationHost.cs
- PointF.cs
- ExtractorMetadata.cs
- BigInt.cs
- Visual.cs
- StateRuntime.cs
- MergeLocalizationDirectives.cs
- LoginViewDesigner.cs
- PrintControllerWithStatusDialog.cs
- FrugalMap.cs
- StatusBarPanel.cs
- ToolStripTextBox.cs
- WebPartRestoreVerb.cs
- SimpleWorkerRequest.cs
- MenuCommand.cs
- WebPartManager.cs
- PlanCompilerUtil.cs
- Grid.cs
- ImpersonateTokenRef.cs
- CannotUnloadAppDomainException.cs
- SuspendDesigner.cs
- TreeViewHitTestInfo.cs
- OpenFileDialog.cs
- Intellisense.cs
- ColorDialog.cs
- CreatingCookieEventArgs.cs
- MonthCalendar.cs
- PointConverter.cs
- DiscoveryExceptionDictionary.cs
- AudienceUriMode.cs
- ToolTipAutomationPeer.cs
- SingleAnimationUsingKeyFrames.cs
- DPCustomTypeDescriptor.cs
- FileIOPermission.cs
- HtmlForm.cs
- PageRouteHandler.cs
- ScriptBehaviorDescriptor.cs
- FontWeightConverter.cs
- ListDictionary.cs
- ErrorStyle.cs
- Positioning.cs
- ListBoxAutomationPeer.cs
- NativeObjectSecurity.cs
- GridViewCellAutomationPeer.cs
- XmlReader.cs
- SqlCommandBuilder.cs
- CatalogPart.cs
- HttpCookie.cs
- XmlArrayAttribute.cs
- DataSetUtil.cs
- BreadCrumbTextConverter.cs
- BrushValueSerializer.cs
- UpdateProgress.cs
- COM2IVsPerPropertyBrowsingHandler.cs
- EDesignUtil.cs
- PeerTransportListenAddressConverter.cs
- IisHelper.cs
- ComponentConverter.cs
- UnsafeNativeMethodsPenimc.cs
- ContentWrapperAttribute.cs
- GetPageNumberCompletedEventArgs.cs
- CategoriesDocument.cs
- ComboBoxAutomationPeer.cs
- DisposableCollectionWrapper.cs
- RightNameExpirationInfoPair.cs
- SynthesizerStateChangedEventArgs.cs
- SmiMetaData.cs
- DataGridViewLinkColumn.cs
- NaturalLanguageHyphenator.cs
- SpellerError.cs
- ToolboxItemAttribute.cs
- cookiecontainer.cs
- TextSelectionHelper.cs
- ViewCellRelation.cs
- Popup.cs
- XmlSerializerSection.cs
- EntityDesignPluralizationHandler.cs
- GridViewItemAutomationPeer.cs
- TypeUtils.cs
- RC2.cs
- Type.cs
- FormClosingEvent.cs
- TextViewDesigner.cs
- ComboBoxDesigner.cs