Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Design / system / Data / Common / Utils / StringUtil.cs / 1305376 / StringUtil.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- namespace System.Data.Common.Utils { // This class provides some useful string utilities, e.g., converting a // list to string. internal static class StringUtil { ////// This private static method checks a string to make sure that it is not empty. /// Comparing with String.Empty is not sufficient since a string with nothing /// but white space isn't considered "empty" by that rationale. /// internal static bool IsNullOrEmptyOrWhiteSpace(string value) { return IsNullOrEmptyOrWhiteSpace(value, 0); } internal static bool IsNullOrEmptyOrWhiteSpace(string value, int offset) { // don't use Trim(), which will copy the string, which may be large, just to test for emptyness //return String.IsNullOrEmpty(value) || String.IsNullOrEmpty(value.Trim()); if (null != value) { for(int i = offset; i < value.Length; ++i) { if (!Char.IsWhiteSpace(value[i])) { return false; } } } return true; } // separate implementation from IsNullOrEmptyOrWhiteSpace(string, int) because that one will // pick up the jit optimization to avoid boundary checks and the this won't is unknown (most likely not) internal static bool IsNullOrEmptyOrWhiteSpace(string value, int offset, int length) { // don't use Trim(), which will copy the string, which may be large, just to test for emptyness //return String.IsNullOrEmpty(value) || String.IsNullOrEmpty(value.Trim()); if (null != value) { length = Math.Min(value.Length, length); for(int i = offset; i < length; ++i) { if (!Char.IsWhiteSpace(value[i])) { return false; } } } return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- namespace System.Data.Common.Utils { // This class provides some useful string utilities, e.g., converting a // list to string. internal static class StringUtil { ////// This private static method checks a string to make sure that it is not empty. /// Comparing with String.Empty is not sufficient since a string with nothing /// but white space isn't considered "empty" by that rationale. /// internal static bool IsNullOrEmptyOrWhiteSpace(string value) { return IsNullOrEmptyOrWhiteSpace(value, 0); } internal static bool IsNullOrEmptyOrWhiteSpace(string value, int offset) { // don't use Trim(), which will copy the string, which may be large, just to test for emptyness //return String.IsNullOrEmpty(value) || String.IsNullOrEmpty(value.Trim()); if (null != value) { for(int i = offset; i < value.Length; ++i) { if (!Char.IsWhiteSpace(value[i])) { return false; } } } return true; } // separate implementation from IsNullOrEmptyOrWhiteSpace(string, int) because that one will // pick up the jit optimization to avoid boundary checks and the this won't is unknown (most likely not) internal static bool IsNullOrEmptyOrWhiteSpace(string value, int offset, int length) { // don't use Trim(), which will copy the string, which may be large, just to test for emptyness //return String.IsNullOrEmpty(value) || String.IsNullOrEmpty(value.Trim()); if (null != value) { length = Math.Min(value.Length, length); for(int i = offset; i < length; ++i) { if (!Char.IsWhiteSpace(value[i])) { return false; } } } return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- XmlMapping.cs
- ControlAdapter.cs
- LocalizabilityAttribute.cs
- ErrorFormatterPage.cs
- DataSetViewSchema.cs
- SrgsOneOf.cs
- SecurityElement.cs
- KnowledgeBase.cs
- PropertyPathWorker.cs
- ChameleonKey.cs
- ImageInfo.cs
- SemanticKeyElement.cs
- WebBrowser.cs
- ObjectDataSourceView.cs
- AutoResizedEvent.cs
- XmlSequenceWriter.cs
- LinkAreaEditor.cs
- OutputBuffer.cs
- DesignerOptionService.cs
- SmtpSection.cs
- GPStream.cs
- MetadataArtifactLoader.cs
- MouseEvent.cs
- EmptyEnumerator.cs
- ParamArrayAttribute.cs
- PtsCache.cs
- WorkflowDefinitionDispenser.cs
- RegexStringValidatorAttribute.cs
- MouseBinding.cs
- ResourceDescriptionAttribute.cs
- System.Data_BID.cs
- XPathParser.cs
- ConfigXmlCDataSection.cs
- ExceptionWrapper.cs
- FunctionDescription.cs
- CodeBinaryOperatorExpression.cs
- PropertyBuilder.cs
- CodeTypeParameterCollection.cs
- RefreshEventArgs.cs
- SiteMapDataSource.cs
- ObjectQueryProvider.cs
- PrivilegeNotHeldException.cs
- ParallelTimeline.cs
- XmlILCommand.cs
- IProducerConsumerCollection.cs
- CatalogPartCollection.cs
- ProfileEventArgs.cs
- XmlCDATASection.cs
- BindingCollection.cs
- ConnectionManagementElement.cs
- TextUtf8RawTextWriter.cs
- SchemaElementLookUpTable.cs
- Version.cs
- ConditionalExpression.cs
- TextChange.cs
- HashCodeCombiner.cs
- ExtensionElement.cs
- CanonicalizationDriver.cs
- DecoderExceptionFallback.cs
- ServicePointManager.cs
- InheritanceContextChangedEventManager.cs
- ImageDrawing.cs
- Screen.cs
- cookiecontainer.cs
- XmlSchemaSimpleTypeRestriction.cs
- OleDbError.cs
- SecurityDescriptor.cs
- SerialPinChanges.cs
- ProfilePropertyMetadata.cs
- TypedReference.cs
- SafeProcessHandle.cs
- UIElementAutomationPeer.cs
- HtmlShim.cs
- WsdlBuildProvider.cs
- ControlValuePropertyAttribute.cs
- XmlNamespaceMapping.cs
- DecoderExceptionFallback.cs
- RequestCache.cs
- DefaultExpression.cs
- UnsafeNetInfoNativeMethods.cs
- X509IssuerSerialKeyIdentifierClause.cs
- Debug.cs
- DispatcherOperation.cs
- Interfaces.cs
- ConfigurationLocationCollection.cs
- FixedSOMPageConstructor.cs
- ObjectTag.cs
- ProxyWebPart.cs
- GlobalProxySelection.cs
- SqlProvider.cs
- TimerEventSubscriptionCollection.cs
- GuidTagList.cs
- XmlValueConverter.cs
- webclient.cs
- HtmlTableCellCollection.cs
- ScrollContentPresenter.cs
- _ContextAwareResult.cs
- Helper.cs
- SQLConvert.cs
- PocoEntityKeyStrategy.cs