Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / TemplateKey.cs / 1 / TemplateKey.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: Base class for DataTemplateKey, TableTemplateKey. // //--------------------------------------------------------------------------- using System; using System.Reflection; using System.ComponentModel; using System.Windows.Markup; using MS.Internal.Data; // DataBindEngine.EnglishUSCulture namespace System.Windows { ///The TemplateKey object is used as the resource key for data templates [TypeConverter(typeof(TemplateKeyConverter))] public abstract class TemplateKey : ResourceKey, ISupportInitialize { ///Constructor (called by derived classes only) protected TemplateKey(TemplateType templateType) { _dataType = null; // still needs to be initialized _templateType = templateType; } ///Constructor (called by derived classes only) protected TemplateKey(TemplateType templateType, object dataType) { Exception ex = ValidateDataType(dataType, "dataType"); if (ex != null) throw ex; _dataType = dataType; _templateType = templateType; } #region ISupportInitialize ///Begin Initialization void ISupportInitialize.BeginInit() { _initializing = true; } ///End Initialization, verify that internal state is consistent void ISupportInitialize.EndInit() { if (_dataType == null) { throw new InvalidOperationException(SR.Get(SRID.PropertyMustHaveValue, "DataType", this.GetType().Name)); } _initializing = false; } #endregion ISupportInitialize ////// The type for which the template is designed. This is either /// a Type (for object data), or a string (for XML data). In the latter /// case the string denotes the XML tag name. /// public object DataType { get { return _dataType; } set { if (!_initializing) throw new InvalidOperationException(SR.Get(SRID.PropertyIsInitializeOnly, "DataType", this.GetType().Name)); if (_dataType != null && value != _dataType) throw new InvalidOperationException(SR.Get(SRID.PropertyIsImmutable, "DataType", this.GetType().Name)); Exception ex = ValidateDataType(value, "value"); if (ex != null) throw ex; _dataType = value; } } ///Override of Object.GetHashCode() public override int GetHashCode() { // note that the hash code can change, but only during intialization // and only once (DataType can only be changed once, from null to // non-null, and that can only happen during [Begin/End]Init). // Technically this is still a violation of the "constant during // lifetime" rule, however in practice this is acceptable. It is // very unlikely that someone will put a TemplateKey into a hashtable // before it is initialized. int hashcode = (int)_templateType; if (_dataType != null) { hashcode += _dataType.GetHashCode(); } return hashcode; } ///Override of Object.Equals() public override bool Equals(object o) { TemplateKey key = o as TemplateKey; if (key != null) { return _templateType == key._templateType && Object.Equals(_dataType, key._dataType); } return false; } ///Override of Object.ToString() public override string ToString() { Type type = DataType as Type; return (DataType != null) ? String.Format(DataBindEngine.EnglishUSCulture, "{0}({1})", this.GetType().Name, DataType) : String.Format(DataBindEngine.EnglishUSCulture, "{0}(null)", this.GetType().Name); } ////// Allows SystemResources to know which assembly the template might be defined in. /// public override Assembly Assembly { get { Type type = _dataType as Type; if (type != null) { return type.Assembly; } return null; } } ///The different types of templates that use TemplateKey protected enum TemplateType { ///DataTemplate DataTemplate, ///TableTemplate TableTemplate, } // Validate against these rules // 1. dataType must not be null (except at initialization, which is tested at EndInit) // 2. dataType must be either a Type (object data) or a string (XML tag name) // 3. dataType cannot be typeof(Object) internal static Exception ValidateDataType(object dataType, string argName) { Exception result = null; if (dataType == null) { result = new ArgumentNullException(argName); } else if (!(dataType is Type) && !(dataType is String)) { result = new ArgumentException(SR.Get(SRID.MustBeTypeOrString, dataType.GetType().Name), argName); } else if (dataType == typeof(Object)) { result = new ArgumentException(SR.Get(SRID.DataTypeCannotBeObject), argName); } return result; } object _dataType; TemplateType _templateType; bool _initializing; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: Base class for DataTemplateKey, TableTemplateKey. // //--------------------------------------------------------------------------- using System; using System.Reflection; using System.ComponentModel; using System.Windows.Markup; using MS.Internal.Data; // DataBindEngine.EnglishUSCulture namespace System.Windows { ///The TemplateKey object is used as the resource key for data templates [TypeConverter(typeof(TemplateKeyConverter))] public abstract class TemplateKey : ResourceKey, ISupportInitialize { ///Constructor (called by derived classes only) protected TemplateKey(TemplateType templateType) { _dataType = null; // still needs to be initialized _templateType = templateType; } ///Constructor (called by derived classes only) protected TemplateKey(TemplateType templateType, object dataType) { Exception ex = ValidateDataType(dataType, "dataType"); if (ex != null) throw ex; _dataType = dataType; _templateType = templateType; } #region ISupportInitialize ///Begin Initialization void ISupportInitialize.BeginInit() { _initializing = true; } ///End Initialization, verify that internal state is consistent void ISupportInitialize.EndInit() { if (_dataType == null) { throw new InvalidOperationException(SR.Get(SRID.PropertyMustHaveValue, "DataType", this.GetType().Name)); } _initializing = false; } #endregion ISupportInitialize ////// The type for which the template is designed. This is either /// a Type (for object data), or a string (for XML data). In the latter /// case the string denotes the XML tag name. /// public object DataType { get { return _dataType; } set { if (!_initializing) throw new InvalidOperationException(SR.Get(SRID.PropertyIsInitializeOnly, "DataType", this.GetType().Name)); if (_dataType != null && value != _dataType) throw new InvalidOperationException(SR.Get(SRID.PropertyIsImmutable, "DataType", this.GetType().Name)); Exception ex = ValidateDataType(value, "value"); if (ex != null) throw ex; _dataType = value; } } ///Override of Object.GetHashCode() public override int GetHashCode() { // note that the hash code can change, but only during intialization // and only once (DataType can only be changed once, from null to // non-null, and that can only happen during [Begin/End]Init). // Technically this is still a violation of the "constant during // lifetime" rule, however in practice this is acceptable. It is // very unlikely that someone will put a TemplateKey into a hashtable // before it is initialized. int hashcode = (int)_templateType; if (_dataType != null) { hashcode += _dataType.GetHashCode(); } return hashcode; } ///Override of Object.Equals() public override bool Equals(object o) { TemplateKey key = o as TemplateKey; if (key != null) { return _templateType == key._templateType && Object.Equals(_dataType, key._dataType); } return false; } ///Override of Object.ToString() public override string ToString() { Type type = DataType as Type; return (DataType != null) ? String.Format(DataBindEngine.EnglishUSCulture, "{0}({1})", this.GetType().Name, DataType) : String.Format(DataBindEngine.EnglishUSCulture, "{0}(null)", this.GetType().Name); } ////// Allows SystemResources to know which assembly the template might be defined in. /// public override Assembly Assembly { get { Type type = _dataType as Type; if (type != null) { return type.Assembly; } return null; } } ///The different types of templates that use TemplateKey protected enum TemplateType { ///DataTemplate DataTemplate, ///TableTemplate TableTemplate, } // Validate against these rules // 1. dataType must not be null (except at initialization, which is tested at EndInit) // 2. dataType must be either a Type (object data) or a string (XML tag name) // 3. dataType cannot be typeof(Object) internal static Exception ValidateDataType(object dataType, string argName) { Exception result = null; if (dataType == null) { result = new ArgumentNullException(argName); } else if (!(dataType is Type) && !(dataType is String)) { result = new ArgumentException(SR.Get(SRID.MustBeTypeOrString, dataType.GetType().Name), argName); } else if (dataType == typeof(Object)) { result = new ArgumentException(SR.Get(SRID.DataTypeCannotBeObject), argName); } return result; } object _dataType; TemplateType _templateType; bool _initializing; } } // 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
- Debug.cs
- SQLInt16.cs
- TreeNode.cs
- AddingNewEventArgs.cs
- ExtensionDataObject.cs
- COM2ComponentEditor.cs
- DesignTimeResourceProviderFactoryAttribute.cs
- ZipIOExtraField.cs
- EditorZoneDesigner.cs
- WorkflowServiceInstance.cs
- LinqDataSourceView.cs
- ShellProvider.cs
- MissingSatelliteAssemblyException.cs
- mda.cs
- ExpressionBuilderContext.cs
- CancelEventArgs.cs
- CodeDirectionExpression.cs
- SafeFileMappingHandle.cs
- MultiView.cs
- FieldNameLookup.cs
- XsltArgumentList.cs
- Simplifier.cs
- PropertyValueChangedEvent.cs
- TreeIterators.cs
- WindowsIPAddress.cs
- ButtonPopupAdapter.cs
- ExecutionContext.cs
- ThreadStateException.cs
- ToolStripRenderer.cs
- XpsDocument.cs
- DeviceContext.cs
- XmlSchemaDocumentation.cs
- MouseBinding.cs
- SettingsAttributes.cs
- WebBrowserProgressChangedEventHandler.cs
- ObjectDataSourceView.cs
- Vector3DCollectionConverter.cs
- FileDialogCustomPlacesCollection.cs
- Rect.cs
- CodeAttributeDeclaration.cs
- MemberHolder.cs
- hebrewshape.cs
- PrivateFontCollection.cs
- HttpDigestClientCredential.cs
- LicenseException.cs
- EncryptedData.cs
- RegexWorker.cs
- ToolStripMenuItem.cs
- UpdatePanel.cs
- DocobjHost.cs
- Pen.cs
- NotImplementedException.cs
- Page.cs
- BindingContext.cs
- SizeAnimationClockResource.cs
- DWriteFactory.cs
- PenThreadPool.cs
- DateTimeOffsetConverter.cs
- Slider.cs
- EncoderExceptionFallback.cs
- RegexGroup.cs
- MutexSecurity.cs
- FilterException.cs
- DataChangedEventManager.cs
- ProxyWebPart.cs
- ParserExtension.cs
- FontSizeConverter.cs
- COM2ComponentEditor.cs
- HttpPostProtocolImporter.cs
- GlyphsSerializer.cs
- FixedSOMGroup.cs
- RecordManager.cs
- PersonalizableTypeEntry.cs
- WindowsFont.cs
- ConnectionStringSettings.cs
- TimeSpanStorage.cs
- ContextProperty.cs
- MediaEntryAttribute.cs
- AppDomainManager.cs
- SendMessageContent.cs
- Label.cs
- ListViewDeletedEventArgs.cs
- TextDecorationUnitValidation.cs
- RegisteredDisposeScript.cs
- SimpleFieldTemplateFactory.cs
- Script.cs
- ErrorRuntimeConfig.cs
- TablePattern.cs
- AssemblyBuilder.cs
- MissingMethodException.cs
- ForEachAction.cs
- SqlConnectionStringBuilder.cs
- Mutex.cs
- PriorityRange.cs
- StatusBarPanelClickEvent.cs
- InvalidCommandTreeException.cs
- WmfPlaceableFileHeader.cs
- PrimaryKeyTypeConverter.cs
- InstanceDescriptor.cs
- ShadowGlyph.cs