Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Data / PropertyGroupDescription.cs / 1305600 / PropertyGroupDescription.cs
//---------------------------------------------------------------------------- // //// Copyright (C) 2003 by Microsoft Corporation. All rights reserved. // // // // Description: Description of grouping based on a property value. // // See spec at http://avalon/connecteddata/Specs/Grouping.mht // //--------------------------------------------------------------------------- using System; // StringComparison using System.ComponentModel; // [DefaultValue] using System.Globalization; // CultureInfo using System.Reflection; // PropertyInfo using System.Windows; // SR using System.Xml; // XmlNode using MS.Internal; // XmlHelper namespace System.Windows.Data { ////// Description of grouping based on a property value. /// public class PropertyGroupDescription : GroupDescription { #region Constructors //----------------------------------------------------- // // Constructors // //----------------------------------------------------- ////// Initializes a new instance of PropertyGroupDescription. /// public PropertyGroupDescription() { } ////// Initializes a new instance of PropertyGroupDescription. /// /// /// The name of the property whose value is used to determine which group(s) /// an item belongs to. /// If PropertyName is null, the item itself is used. /// public PropertyGroupDescription(string propertyName) { UpdatePropertyName(propertyName); } ////// Initializes a new instance of PropertyGroupDescription. /// /// /// The name of the property whose value is used to determine which group(s) /// an item belongs to. /// If PropertyName is null, the item itself is used. /// /// /// This converter is applied to the property value (or the item) to /// produce the final value used to determine which group(s) an item /// belongs to. /// If the delegate returns an ICollection, the item is added to /// multiple groups - one for each member of the collection. /// public PropertyGroupDescription(string propertyName, IValueConverter converter) { UpdatePropertyName(propertyName); _converter = converter; } ////// Initializes a new instance of PropertyGroupDescription. /// /// /// The name of the property whose value is used to determine which group(s) /// an item belongs to. /// If PropertyName is null, the item itself is used. /// /// /// This converter is applied to the property value (or the item) to /// produce the final value used to determine which group(s) an item /// belongs to. /// If the delegate returns an ICollection, the item is added to /// multiple groups - one for each member of the collection. /// /// /// This governs the comparison between an item's value (as determined /// by PropertyName and Converter) and a group's name. /// It is ignored unless both comparands are strings. /// The default value is StringComparison.Ordinal. /// public PropertyGroupDescription(string propertyName, IValueConverter converter, StringComparison stringComparison) { UpdatePropertyName(propertyName); _converter = converter; _stringComparison = stringComparison; } #endregion Constructors #region Public Properties //------------------------------------------------------ // // Public Properties // //----------------------------------------------------- ////// The name of the property whose value is used to determine which group(s) /// an item belongs to. /// If PropertyName is null, the item itself is used. /// [DefaultValue(null)] public string PropertyName { get { return _propertyName; } set { UpdatePropertyName(value); OnPropertyChanged("PropertyName"); } } ////// This converter is applied to the property value (or the item) to /// produce the final value used to determine which group(s) an item /// belongs to. /// If the delegate returns an ICollection, the item is added to /// multiple groups - one for each member of the collection. /// [DefaultValue(null)] public IValueConverter Converter { get { return _converter; } set { _converter = value; OnPropertyChanged("Converter"); } } ////// This governs the comparison between an item's value (as determined /// by PropertyName and Converter) and a group's name. /// It is ignored unless both comparands are strings. /// The default value is StringComparison.Ordinal. /// [DefaultValue(StringComparison.Ordinal)] public StringComparison StringComparison { get { return _stringComparison; } set { _stringComparison = value; OnPropertyChanged("StringComparison"); } } #endregion Public Properties #region Public Methods //------------------------------------------------------ // // Public Methods // //------------------------------------------------------ ////// Return the group name(s) for the given item /// public override object GroupNameFromItem(object item, int level, CultureInfo culture) { object value; object xmlValue; // get the property value if (String.IsNullOrEmpty(PropertyName)) { value = item; } else if (AssemblyHelper.TryGetValueFromXmlNode(item, PropertyName, out xmlValue)) { value = xmlValue; } else if (item != null) { using (_propertyPath.SetContext(item)) { value = _propertyPath.GetValue(); } } else { value = null; } // apply the converter to the value if (Converter != null) { value = Converter.Convert(value, typeof(object), level, culture); } return value; } ////// Return true if the names match (i.e the item should belong to the group). /// public override bool NamesMatch(object groupName, object itemName) { string s1 = groupName as string; string s2 = itemName as string; if (s1 != null && s2 != null) { return String.Equals(s1, s2, StringComparison); } else { return Object.Equals(groupName, itemName); } } #endregion Public Methods #region Private Methods private void UpdatePropertyName(string propertyName) { _propertyName = propertyName; _propertyPath = !String.IsNullOrEmpty(propertyName) ? new PropertyPath(propertyName) : null; } private void OnPropertyChanged(string propertyName) { OnPropertyChanged(new PropertyChangedEventArgs(propertyName)); } #endregion Private Methods #region Private Fields //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ string _propertyName; PropertyPath _propertyPath; IValueConverter _converter; StringComparison _stringComparison = StringComparison.Ordinal; #endregion Private Fields } } // 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
- CqlIdentifiers.cs
- ServiceHost.cs
- HttpWrapper.cs
- TemplateControlCodeDomTreeGenerator.cs
- WorkflowFileItem.cs
- CodeMethodReturnStatement.cs
- DependencyPropertyChangedEventArgs.cs
- ProtectedConfigurationSection.cs
- TextEditorThreadLocalStore.cs
- AnnotationAdorner.cs
- IPAddressCollection.cs
- _ProxyChain.cs
- M3DUtil.cs
- QueryExpr.cs
- infer.cs
- SiteMapPath.cs
- SQLMoney.cs
- ISCIIEncoding.cs
- BasicAsyncResult.cs
- DataGridRow.cs
- _ReceiveMessageOverlappedAsyncResult.cs
- PreloadedPackages.cs
- StrokeNodeEnumerator.cs
- ellipse.cs
- CrossAppDomainChannel.cs
- DataGridViewComboBoxEditingControl.cs
- PropertyDescriptorComparer.cs
- EntityTransaction.cs
- FileSystemEventArgs.cs
- FormViewUpdatedEventArgs.cs
- TransactionFlowBindingElement.cs
- EdmMember.cs
- IndentTextWriter.cs
- CheckedPointers.cs
- ComponentChangedEvent.cs
- TriggerAction.cs
- TableLayoutSettings.cs
- BamlLocalizationDictionary.cs
- SharedDp.cs
- WebDescriptionAttribute.cs
- mediaclock.cs
- MetaType.cs
- BitmapSource.cs
- MultiPartWriter.cs
- DefaultParameterValueAttribute.cs
- TableRowGroupCollection.cs
- TimeStampChecker.cs
- DrawingContextWalker.cs
- WebColorConverter.cs
- CapiNative.cs
- Page.cs
- DataGridViewColumnCollection.cs
- XamlToRtfParser.cs
- SQlBooleanStorage.cs
- HelloMessage11.cs
- DescendantBaseQuery.cs
- EntitySqlQueryCacheKey.cs
- StylusTouchDevice.cs
- ConvertersCollection.cs
- SqlDataSource.cs
- messageonlyhwndwrapper.cs
- VersionedStream.cs
- _FtpControlStream.cs
- SrgsRulesCollection.cs
- IPCCacheManager.cs
- RequestCachePolicy.cs
- InputBuffer.cs
- BinaryObjectWriter.cs
- StructuredTypeEmitter.cs
- SourceLineInfo.cs
- RegistrationServices.cs
- PeerContact.cs
- ActivationServices.cs
- XPathNodePointer.cs
- TableLayout.cs
- SQLResource.cs
- PassportAuthenticationModule.cs
- TextWriter.cs
- CodeConstructor.cs
- ListViewEditEventArgs.cs
- ForceCopyBuildProvider.cs
- ProcessHostConfigUtils.cs
- DropDownButton.cs
- TrustSection.cs
- GotoExpression.cs
- SqlUserDefinedTypeAttribute.cs
- DataViewSettingCollection.cs
- List.cs
- SessionEndingEventArgs.cs
- _Rfc2616CacheValidators.cs
- IsolatedStorageFilePermission.cs
- DbParameterCollectionHelper.cs
- AssemblyCollection.cs
- UnsafeNativeMethods.cs
- CachedBitmap.cs
- TransportReplyChannelAcceptor.cs
- PrintPreviewDialog.cs
- SupportingTokenListenerFactory.cs
- ConstructorBuilder.cs
- DataServiceClientException.cs