Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / System / Windows / Controls / DataErrorValidationRule.cs / 1 / DataErrorValidationRule.cs
//---------------------------------------------------------------------------- // //// Copyright (C) by Microsoft Corporation. All rights reserved. // // // // Description: // DataErrorValidationRule is used when a ValidationError is the result of // a data error in the source item itself (e.g. as exposed by IDataErrorInfo). // //--------------------------------------------------------------------------- using System; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using MS.Internal; namespace System.Windows.Controls { ////// DataErrorValidationRule can be added to the ValidationRulesCollection of a Binding /// or MultiBinding to indicate that data errors in the source object should /// be considered ValidationErrors /// public sealed class DataErrorValidationRule : ValidationRule { ////// DataErrorValidationRule ctor. /// public DataErrorValidationRule() : base(ValidationStep.CommittedValue, true) { } ////// Validate is called when Data binding is updating /// public override ValidationResult Validate(object value, CultureInfo cultureInfo) { // This rule is called during the CommittedValue step, so the value is the // owner of the rule collection - either a BindingGroup or an individual // binding expression. BindingGroup bindingGroup; BindingExpression bindingExpr; if ((bindingGroup = value as BindingGroup) != null) { // in a BindingGroup, check the item-level IDataErrorInfo for each // source item in the group IList items = bindingGroup.Items; for (int i=items.Count-1; i>=0; --i) { IDataErrorInfo idei = items[i] as IDataErrorInfo; if (idei != null) { string error = idei.Error; if (!String.IsNullOrEmpty(error)) { return new ValidationResult(false, error); } } } } else if ((bindingExpr = value as BindingExpression) != null) { // in a binding, check the error info for the binding's source // property IDataErrorInfo idei = bindingExpr.SourceItem as IDataErrorInfo; string name = (idei != null) ? bindingExpr.SourcePropertyName : null; if (!String.IsNullOrEmpty(name)) { // get the data error information, if any, by calling idie[name]. // We do this in a paranoid way, even though indexers with // string-valued arguments are not supposed to throw exceptions. // PreSharp uses message numbers that the C# compiler doesn't know about. // Disable the C# complaints, per the PreSharp documentation. #pragma warning disable 1634, 1691 // PreSharp complains about catching NullReference (and other) exceptions. // It doesn't recognize that IsCriticalException() handles these correctly. #pragma warning disable 56500 string error; try { error = idei[name]; } catch (Exception ex) { if (CriticalExceptions.IsCriticalException(ex)) throw; error = null; if (TraceData.IsEnabled) { TraceData.Trace(TraceEventType.Error, TraceData.DataErrorInfoFailed( name, idei.GetType().FullName, ex.GetType().FullName, ex.Message), bindingExpr); } } #pragma warning restore 56500 #pragma warning restore 1634, 1691 if (!String.IsNullOrEmpty(error)) { return new ValidationResult(false, error); } } } else throw new InvalidOperationException(SR.Get(SRID.ValidationRule_UnexpectedValue, this, value)); return ValidationResult.ValidResult; } internal static readonly DataErrorValidationRule Instance = new DataErrorValidationRule(); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) by Microsoft Corporation. All rights reserved. // // // // Description: // DataErrorValidationRule is used when a ValidationError is the result of // a data error in the source item itself (e.g. as exposed by IDataErrorInfo). // //--------------------------------------------------------------------------- using System; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using MS.Internal; namespace System.Windows.Controls { ////// DataErrorValidationRule can be added to the ValidationRulesCollection of a Binding /// or MultiBinding to indicate that data errors in the source object should /// be considered ValidationErrors /// public sealed class DataErrorValidationRule : ValidationRule { ////// DataErrorValidationRule ctor. /// public DataErrorValidationRule() : base(ValidationStep.CommittedValue, true) { } ////// Validate is called when Data binding is updating /// public override ValidationResult Validate(object value, CultureInfo cultureInfo) { // This rule is called during the CommittedValue step, so the value is the // owner of the rule collection - either a BindingGroup or an individual // binding expression. BindingGroup bindingGroup; BindingExpression bindingExpr; if ((bindingGroup = value as BindingGroup) != null) { // in a BindingGroup, check the item-level IDataErrorInfo for each // source item in the group IList items = bindingGroup.Items; for (int i=items.Count-1; i>=0; --i) { IDataErrorInfo idei = items[i] as IDataErrorInfo; if (idei != null) { string error = idei.Error; if (!String.IsNullOrEmpty(error)) { return new ValidationResult(false, error); } } } } else if ((bindingExpr = value as BindingExpression) != null) { // in a binding, check the error info for the binding's source // property IDataErrorInfo idei = bindingExpr.SourceItem as IDataErrorInfo; string name = (idei != null) ? bindingExpr.SourcePropertyName : null; if (!String.IsNullOrEmpty(name)) { // get the data error information, if any, by calling idie[name]. // We do this in a paranoid way, even though indexers with // string-valued arguments are not supposed to throw exceptions. // PreSharp uses message numbers that the C# compiler doesn't know about. // Disable the C# complaints, per the PreSharp documentation. #pragma warning disable 1634, 1691 // PreSharp complains about catching NullReference (and other) exceptions. // It doesn't recognize that IsCriticalException() handles these correctly. #pragma warning disable 56500 string error; try { error = idei[name]; } catch (Exception ex) { if (CriticalExceptions.IsCriticalException(ex)) throw; error = null; if (TraceData.IsEnabled) { TraceData.Trace(TraceEventType.Error, TraceData.DataErrorInfoFailed( name, idei.GetType().FullName, ex.GetType().FullName, ex.Message), bindingExpr); } } #pragma warning restore 56500 #pragma warning restore 1634, 1691 if (!String.IsNullOrEmpty(error)) { return new ValidationResult(false, error); } } } else throw new InvalidOperationException(SR.Get(SRID.ValidationRule_UnexpectedValue, this, value)); return ValidationResult.ValidResult; } internal static readonly DataErrorValidationRule Instance = new DataErrorValidationRule(); } } // 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
- AddressingVersion.cs
- RijndaelManagedTransform.cs
- Utility.cs
- ButtonChrome.cs
- ControlCachePolicy.cs
- CompilerWrapper.cs
- TraceLevelStore.cs
- EdmEntityTypeAttribute.cs
- HMAC.cs
- XmlWrappingReader.cs
- CompiledQueryCacheEntry.cs
- XmlTypeAttribute.cs
- UntypedNullExpression.cs
- ServerValidateEventArgs.cs
- ModuleBuilder.cs
- TargetParameterCountException.cs
- Int64Animation.cs
- ValidateNames.cs
- XmlChildNodes.cs
- FixedSOMTableRow.cs
- TypeValidationEventArgs.cs
- DirectoryObjectSecurity.cs
- TitleStyle.cs
- ToolStripSeparator.cs
- DrawingGroup.cs
- NamedPermissionSet.cs
- CanonicalFormWriter.cs
- ItemMap.cs
- AutomationPropertyInfo.cs
- MessageHeaderInfoTraceRecord.cs
- Translator.cs
- CachingHintValidation.cs
- _KerberosClient.cs
- OdbcReferenceCollection.cs
- SoapSchemaExporter.cs
- BufferModeSettings.cs
- CategoryGridEntry.cs
- Guid.cs
- MsmqIntegrationInputChannel.cs
- Mutex.cs
- TypeNameConverter.cs
- TraceHandlerErrorFormatter.cs
- FormViewUpdatedEventArgs.cs
- ErrorProvider.cs
- WebBrowsableAttribute.cs
- ByteStreamBufferedMessageData.cs
- ApplicationSecurityManager.cs
- ActivityCodeDomReferenceService.cs
- MediaContext.cs
- GPStream.cs
- DrawingContext.cs
- SqlParameterCollection.cs
- UnsafeMethods.cs
- UnsafeNativeMethods.cs
- DynamicDocumentPaginator.cs
- PagesSection.cs
- Rotation3DKeyFrameCollection.cs
- PrintController.cs
- ResponseStream.cs
- SamlAuthorityBinding.cs
- CommonDialog.cs
- RenamedEventArgs.cs
- CfgArc.cs
- MenuItemAutomationPeer.cs
- ElapsedEventArgs.cs
- DynamicQueryStringParameter.cs
- ClientClassGenerator.cs
- EdmComplexTypeAttribute.cs
- IdleTimeoutMonitor.cs
- ListViewDeleteEventArgs.cs
- OverflowException.cs
- PackWebRequestFactory.cs
- ObjectListCommandCollection.cs
- SamlSubject.cs
- BoundingRectTracker.cs
- serverconfig.cs
- GraphicsPathIterator.cs
- BitmapCodecInfoInternal.cs
- EntitySqlQueryState.cs
- MapPathBasedVirtualPathProvider.cs
- LineMetrics.cs
- ISAPIWorkerRequest.cs
- OdbcErrorCollection.cs
- TitleStyle.cs
- AsyncDataRequest.cs
- SynchronizationFilter.cs
- BaseComponentEditor.cs
- TagPrefixAttribute.cs
- RequiredAttributeAttribute.cs
- OperatingSystem.cs
- PopupEventArgs.cs
- Set.cs
- CodeDirectoryCompiler.cs
- ToolBarButtonClickEvent.cs
- FontUnit.cs
- altserialization.cs
- HttpModuleAction.cs
- ProtectedConfigurationSection.cs
- RelOps.cs
- ServiceEndpointElement.cs