Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Common / CommandTrees / ExpressionBindings.cs / 1 / ExpressionBindings.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Data.Common; using System.Data.Common.Utils; using System.Data.Metadata.Edm; using System.Data.Common.CommandTrees.Internal; namespace System.Data.Common.CommandTrees { ////// Describes a binding for an expression. Conceptually similar to a foreach loop /// in C#. The DbExpression property defines the collection being iterated over, /// while the Var property provides a means to reference the current element /// of the collection during the iteration. DbExpressionBinding is used to describe the set arguments /// to relational expressions such as ///, /// and . /// /// [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbExpressionBinding { private ExpressionLink _expr; private string _varName; private TypeUsage _varType; internal DbExpressionBinding(DbCommandTree cmdTree, DbExpression input, string varName) { // // Ensure no argument is null // EntityUtil.CheckArgumentNull(varName, "varName"); _expr = new ExpressionLink("Expression", cmdTree, input); // // Ensure Variable name is non-empty // if (string.IsNullOrEmpty(varName)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Binding_VariableNameNotValid, "varName"); } // // Ensure the DbExpression has a collection result type // TypeUsage elementType = null; if(!TypeHelpers.TryGetCollectionElementType(input.ResultType, out elementType)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Binding_CollectionRequired, "input"); } Debug.Assert(elementType.IsReadOnly, "DbExpressionBinding Expression ResultType has editable element type"); _varName = varName; _varType = elementType; } /// /// Gets or sets the ///that defines the input set. /// The expression is null ////// The expression is not associated with the binding's command tree, or its result type is not /// equal or promotable to the result type of the current value of the property. /// public DbExpression Expression { get { return _expr.Expression; } /*CQT_PUBLIC_API(*/internal/*)*/ set { _expr.Expression = value; } } ////// Gets the name assigned to the element variable. /// public string VariableName { get { return _varName; } } ////// Gets the type metadata of the element variable. /// public TypeUsage VariableType { get { return _varType; } } ////// Creates a new /*CQT_PUBLIC_API(*/internal/*)*/ DbVariableReferenceExpression Variable { get { return _expr.Expression.CommandTree.CreateVariableReferenceExpression(_varName, _varType); } } internal static void Check(string strName, DbExpressionBinding binding, DbCommandTree owner) { if (null == binding) { throw EntityUtil.ArgumentNull(strName); } if (owner != binding.Expression.CommandTree) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_General_TreeMismatch, strName); } } } ///that references the element variable. /// /// Defines the binding for the input set to a [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbGroupExpressionBinding { private ExpressionLink _expr; private string _varName; private TypeUsage _varType; private string _groupVarName; internal DbGroupExpressionBinding(DbCommandTree cmdTree, DbExpression input, string varName, string groupVarName) { // // Ensure no argument is null // EntityUtil.CheckArgumentNull(varName, "varName"); EntityUtil.CheckArgumentNull(groupVarName, "groupVarName"); _expr = new ExpressionLink("Expression", cmdTree, input); // // Ensure Variable and Group names are both non-empty // if (string.IsNullOrEmpty(varName)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Binding_VariableNameNotValid, "varName"); } if (string.IsNullOrEmpty(groupVarName)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_GroupBinding_GroupVariableNameNotValid, "groupVarName"); } // // Ensure the DbExpression has a collection result type // TypeUsage elementType = null; if (!TypeHelpers.TryGetCollectionElementType(input.ResultType, out elementType)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_GroupBinding_CollectionRequired, "input"); } Debug.Assert((elementType.IsReadOnly), "DbGroupExpressionBinding Expression ResultType has editable element type"); _varName = varName; _varType = elementType; _groupVarName = groupVarName; } ///. /// In addition to the properties of , DbGroupExpressionBinding /// also provides access to the group element via the variable reference. /// /// Gets or sets the ///that defines the input set. /// The expression is null ////// The expression is not associated with the binding's command tree, or its result type is not /// equal or promotable to the result type of the current value of the property. /// public DbExpression Expression { get { return _expr.Expression; } /*CQT_PUBLIC_API(*/internal/*)*/ set { _expr.Expression = value; } } ////// Gets the name assigned to the element variable. /// public string VariableName { get { return _varName; } } ////// Gets the type metadata of the element variable. /// public TypeUsage VariableType { get { return _varType; } } ////// Creates a new DbVariableReferenceExpression that references the element variable. /// /*CQT_PUBLIC_API(*/internal/*)*/ DbVariableReferenceExpression Variable { get { return _expr.Expression.CommandTree.CreateVariableReferenceExpression(_varName, _varType); } } ////// Gets the name assigned to the group element variable. /// public string GroupVariableName { get { return _groupVarName; } } ////// Gets the type metadata of the group element variable. /// public TypeUsage GroupVariableType { get { return _varType; } } ////// Creates a new DbVariableReferenceExpression that references the group element variable. /// /*CQT_PUBLIC_API(*/internal/*)*/ DbVariableReferenceExpression GroupVariable { get { return this.Expression.CommandTree.CreateVariableReferenceExpression(_groupVarName, _varType); } } internal static void Check(string strName, DbGroupExpressionBinding binding, DbCommandTree owner) { if (null == binding) { throw EntityUtil.ArgumentNull(strName); } if (owner != binding.Expression.CommandTree) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_General_TreeMismatch, strName); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Data.Common; using System.Data.Common.Utils; using System.Data.Metadata.Edm; using System.Data.Common.CommandTrees.Internal; namespace System.Data.Common.CommandTrees { ////// Describes a binding for an expression. Conceptually similar to a foreach loop /// in C#. The DbExpression property defines the collection being iterated over, /// while the Var property provides a means to reference the current element /// of the collection during the iteration. DbExpressionBinding is used to describe the set arguments /// to relational expressions such as ///, /// and . /// /// [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbExpressionBinding { private ExpressionLink _expr; private string _varName; private TypeUsage _varType; internal DbExpressionBinding(DbCommandTree cmdTree, DbExpression input, string varName) { // // Ensure no argument is null // EntityUtil.CheckArgumentNull(varName, "varName"); _expr = new ExpressionLink("Expression", cmdTree, input); // // Ensure Variable name is non-empty // if (string.IsNullOrEmpty(varName)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Binding_VariableNameNotValid, "varName"); } // // Ensure the DbExpression has a collection result type // TypeUsage elementType = null; if(!TypeHelpers.TryGetCollectionElementType(input.ResultType, out elementType)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Binding_CollectionRequired, "input"); } Debug.Assert(elementType.IsReadOnly, "DbExpressionBinding Expression ResultType has editable element type"); _varName = varName; _varType = elementType; } /// /// Gets or sets the ///that defines the input set. /// The expression is null ////// The expression is not associated with the binding's command tree, or its result type is not /// equal or promotable to the result type of the current value of the property. /// public DbExpression Expression { get { return _expr.Expression; } /*CQT_PUBLIC_API(*/internal/*)*/ set { _expr.Expression = value; } } ////// Gets the name assigned to the element variable. /// public string VariableName { get { return _varName; } } ////// Gets the type metadata of the element variable. /// public TypeUsage VariableType { get { return _varType; } } ////// Creates a new /*CQT_PUBLIC_API(*/internal/*)*/ DbVariableReferenceExpression Variable { get { return _expr.Expression.CommandTree.CreateVariableReferenceExpression(_varName, _varType); } } internal static void Check(string strName, DbExpressionBinding binding, DbCommandTree owner) { if (null == binding) { throw EntityUtil.ArgumentNull(strName); } if (owner != binding.Expression.CommandTree) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_General_TreeMismatch, strName); } } } ///that references the element variable. /// /// Defines the binding for the input set to a [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public sealed class DbGroupExpressionBinding { private ExpressionLink _expr; private string _varName; private TypeUsage _varType; private string _groupVarName; internal DbGroupExpressionBinding(DbCommandTree cmdTree, DbExpression input, string varName, string groupVarName) { // // Ensure no argument is null // EntityUtil.CheckArgumentNull(varName, "varName"); EntityUtil.CheckArgumentNull(groupVarName, "groupVarName"); _expr = new ExpressionLink("Expression", cmdTree, input); // // Ensure Variable and Group names are both non-empty // if (string.IsNullOrEmpty(varName)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_Binding_VariableNameNotValid, "varName"); } if (string.IsNullOrEmpty(groupVarName)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_GroupBinding_GroupVariableNameNotValid, "groupVarName"); } // // Ensure the DbExpression has a collection result type // TypeUsage elementType = null; if (!TypeHelpers.TryGetCollectionElementType(input.ResultType, out elementType)) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_GroupBinding_CollectionRequired, "input"); } Debug.Assert((elementType.IsReadOnly), "DbGroupExpressionBinding Expression ResultType has editable element type"); _varName = varName; _varType = elementType; _groupVarName = groupVarName; } ///. /// In addition to the properties of , DbGroupExpressionBinding /// also provides access to the group element via the variable reference. /// /// Gets or sets the ///that defines the input set. /// The expression is null ////// The expression is not associated with the binding's command tree, or its result type is not /// equal or promotable to the result type of the current value of the property. /// public DbExpression Expression { get { return _expr.Expression; } /*CQT_PUBLIC_API(*/internal/*)*/ set { _expr.Expression = value; } } ////// Gets the name assigned to the element variable. /// public string VariableName { get { return _varName; } } ////// Gets the type metadata of the element variable. /// public TypeUsage VariableType { get { return _varType; } } ////// Creates a new DbVariableReferenceExpression that references the element variable. /// /*CQT_PUBLIC_API(*/internal/*)*/ DbVariableReferenceExpression Variable { get { return _expr.Expression.CommandTree.CreateVariableReferenceExpression(_varName, _varType); } } ////// Gets the name assigned to the group element variable. /// public string GroupVariableName { get { return _groupVarName; } } ////// Gets the type metadata of the group element variable. /// public TypeUsage GroupVariableType { get { return _varType; } } ////// Creates a new DbVariableReferenceExpression that references the group element variable. /// /*CQT_PUBLIC_API(*/internal/*)*/ DbVariableReferenceExpression GroupVariable { get { return this.Expression.CommandTree.CreateVariableReferenceExpression(_groupVarName, _varType); } } internal static void Check(string strName, DbGroupExpressionBinding binding, DbCommandTree owner) { if (null == binding) { throw EntityUtil.ArgumentNull(strName); } if (owner != binding.Expression.CommandTree) { throw EntityUtil.Argument(System.Data.Entity.Strings.Cqt_General_TreeMismatch, strName); } } } } // 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
- ObjectDataSourceStatusEventArgs.cs
- TextPointer.cs
- ExeConfigurationFileMap.cs
- ImageBrush.cs
- OrderingInfo.cs
- DashStyles.cs
- RuntimeConfigurationRecord.cs
- DtdParser.cs
- TrustLevelCollection.cs
- SoapIgnoreAttribute.cs
- SupportsPreviewControlAttribute.cs
- ConnectionsZone.cs
- PointUtil.cs
- PropertyOrder.cs
- SortQuery.cs
- XmlQueryRuntime.cs
- CharacterMetricsDictionary.cs
- AttributeParameterInfo.cs
- ServerIdentity.cs
- MenuItem.cs
- QueueTransferProtocol.cs
- UserControlCodeDomTreeGenerator.cs
- DescendantOverDescendantQuery.cs
- TdsParameterSetter.cs
- AccessDataSource.cs
- XPathChildIterator.cs
- StreamReader.cs
- RegexCompilationInfo.cs
- DateTimeOffsetAdapter.cs
- GeneralTransform3DTo2D.cs
- DataAccessor.cs
- Binding.cs
- DataGridViewTextBoxEditingControl.cs
- FontStretchConverter.cs
- remotingproxy.cs
- Normalizer.cs
- DictionaryBase.cs
- DiscoveryProxy.cs
- FileEnumerator.cs
- TableLayoutPanelResizeGlyph.cs
- DbResourceAllocator.cs
- ProcessHostFactoryHelper.cs
- UserInitiatedNavigationPermission.cs
- ConnectionsZone.cs
- SequenceDesigner.cs
- HtmlInputRadioButton.cs
- ColorKeyFrameCollection.cs
- TransformDescriptor.cs
- ExcCanonicalXml.cs
- IPEndPoint.cs
- TrackingStringDictionary.cs
- ArgumentValidation.cs
- EditingScope.cs
- SrgsGrammarCompiler.cs
- Rotation3DAnimation.cs
- LineUtil.cs
- DeviceContexts.cs
- TextLineResult.cs
- SpeakProgressEventArgs.cs
- HttpListenerRequestUriBuilder.cs
- AmbientLight.cs
- DataFormat.cs
- BindingSource.cs
- Geometry.cs
- ConfigXmlReader.cs
- SystemIPAddressInformation.cs
- _LocalDataStore.cs
- ProfileInfo.cs
- FamilyCollection.cs
- ConfigurationValues.cs
- X509CertificateChain.cs
- HistoryEventArgs.cs
- StringTraceRecord.cs
- UserUseLicenseDictionaryLoader.cs
- EntityDataSourceWizardForm.cs
- ParserContext.cs
- TTSEvent.cs
- SoapIncludeAttribute.cs
- HitTestWithGeometryDrawingContextWalker.cs
- TemplateAction.cs
- EntityContainerEmitter.cs
- TdsParserSessionPool.cs
- InnerItemCollectionView.cs
- TransportContext.cs
- AVElementHelper.cs
- ObjRef.cs
- ObjectDataSourceFilteringEventArgs.cs
- PropertyIdentifier.cs
- BinaryObjectReader.cs
- SspiWrapper.cs
- RemotingAttributes.cs
- X509PeerCertificateElement.cs
- NotCondition.cs
- DataTableMapping.cs
- EdmItemCollection.cs
- ProviderBase.cs
- CurrentTimeZone.cs
- UncommonField.cs
- ViewBox.cs
- JulianCalendar.cs