Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / Controls / DataErrorValidationRule.cs / 2 / 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
- controlskin.cs
- ManipulationPivot.cs
- RequestQueryProcessor.cs
- QilBinary.cs
- WebColorConverter.cs
- ValueType.cs
- entitydatasourceentitysetnameconverter.cs
- RadioButtonList.cs
- ExceptionHandlersDesigner.cs
- EditorPartDesigner.cs
- Options.cs
- PeerNameResolver.cs
- XPathExpr.cs
- ColumnResizeUndoUnit.cs
- webeventbuffer.cs
- RotateTransform3D.cs
- DesignerValidatorAdapter.cs
- DuplicateMessageDetector.cs
- LoadItemsEventArgs.cs
- FontCollection.cs
- GatewayDefinition.cs
- MostlySingletonList.cs
- XmlDictionaryString.cs
- TreeViewDesigner.cs
- ImageConverter.cs
- autovalidator.cs
- OpCodes.cs
- InvokePattern.cs
- WebPartDeleteVerb.cs
- StringFormat.cs
- IndexedGlyphRun.cs
- FormClosingEvent.cs
- XhtmlBasicCommandAdapter.cs
- XsltQilFactory.cs
- RecognizedAudio.cs
- TypeResolvingOptionsAttribute.cs
- TypeDescriptionProviderAttribute.cs
- CleanUpVirtualizedItemEventArgs.cs
- ConnectionPointGlyph.cs
- TransportContext.cs
- TextParagraphProperties.cs
- PermissionToken.cs
- CollectionsUtil.cs
- BatchWriter.cs
- FormCollection.cs
- SuppressMessageAttribute.cs
- ApplicationFileCodeDomTreeGenerator.cs
- ReadOnlyObservableCollection.cs
- CodeComment.cs
- DataColumnCollection.cs
- UnmanagedMarshal.cs
- MemoryRecordBuffer.cs
- TaiwanCalendar.cs
- DebugView.cs
- OpacityConverter.cs
- AsyncOperation.cs
- HScrollProperties.cs
- EntityWrapper.cs
- RoutedEvent.cs
- SBCSCodePageEncoding.cs
- ConfigurationCollectionAttribute.cs
- BitmapCache.cs
- EditorPartCollection.cs
- Error.cs
- RemotingHelper.cs
- QueryAccessibilityHelpEvent.cs
- PointAnimationUsingPath.cs
- DBDataPermission.cs
- CorrelationTokenTypeConvertor.cs
- FactoryId.cs
- ActivityExecutionContextCollection.cs
- DateTimeHelper.cs
- XPathExpr.cs
- SafeUserTokenHandle.cs
- ExtentKey.cs
- LogicalMethodInfo.cs
- ApplicationContext.cs
- FirstMatchCodeGroup.cs
- DataControlFieldCell.cs
- AspNetPartialTrustHelpers.cs
- RenderContext.cs
- PackWebResponse.cs
- Win32MouseDevice.cs
- QueryResponse.cs
- EventManager.cs
- RelationshipEnd.cs
- CompensationToken.cs
- PropertyValue.cs
- ConfigXmlElement.cs
- followingquery.cs
- Material.cs
- XmlCharacterData.cs
- LocalIdCollection.cs
- XhtmlCssHandler.cs
- Connection.cs
- DataGridViewColumnConverter.cs
- BigInt.cs
- HelpInfo.cs
- DesignObjectWrapper.cs
- AttachedPropertyBrowsableAttribute.cs