Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / xsp / System / Web / UI / DataSourceSelectArguments.cs / 1 / DataSourceSelectArguments.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI { using System.Diagnostics; using System.Security.Permissions; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class DataSourceSelectArguments { private DataSourceCapabilities _requestedCapabilities; private DataSourceCapabilities _supportedCapabilities; private int _maximumRows; private bool _retrieveTotalRowCount; private string _sortExpression; private int _startRowIndex; private int _totalRowCount = -1; public DataSourceSelectArguments() : this(String.Empty, 0, 0) { } public DataSourceSelectArguments(string sortExpression) : this(sortExpression, 0, 0) { } public DataSourceSelectArguments(int startRowIndex, int maximumRows) : this(String.Empty, startRowIndex, maximumRows) { } public DataSourceSelectArguments(string sortExpression, int startRowIndex, int maximumRows) { SortExpression = sortExpression; StartRowIndex = startRowIndex; MaximumRows = maximumRows; } // Empty cannot be a static readonly field because we want each requester to get their own copy. // This is because DataSourceViews need to call AddSupportedCapabilities on the DataSourceSelectArguments, // changing it to be suited to the DataSourceView's needs. If another DataSourceView used the same instance, // the supported capabilities would be wrong. This member stays as a property for programming ease and // returns a new instance each time. If the user wants to change this instance, they're free to. public static DataSourceSelectArguments Empty { get { return new DataSourceSelectArguments(); } } ////// The maximum number of rows requested for a paged data request. /// Use 0 to indicate all rows. /// public int MaximumRows { get { return _maximumRows; } set { if (value == 0) { if (_startRowIndex == 0) { _requestedCapabilities &= ~DataSourceCapabilities.Page; } } else { _requestedCapabilities |= DataSourceCapabilities.Page; } _maximumRows = value; } } ////// Indicates whether the total row count is requested /// public bool RetrieveTotalRowCount { get { return _retrieveTotalRowCount; } set { if (value) { _requestedCapabilities |= DataSourceCapabilities.RetrieveTotalRowCount; } else { _requestedCapabilities &= ~DataSourceCapabilities.RetrieveTotalRowCount; } _retrieveTotalRowCount = value; } } ////// The expression used to sort the data. /// public string SortExpression { get { if (_sortExpression == null) _sortExpression = String.Empty; return _sortExpression; } set { if (String.IsNullOrEmpty(value)) { _requestedCapabilities &= ~DataSourceCapabilities.Sort; } else { _requestedCapabilities |= DataSourceCapabilities.Sort; } _sortExpression = value; } } ////// The index of the first row requested for a paged data request /// public int StartRowIndex { get { return _startRowIndex; } set { if (value == 0) { if (_maximumRows == 0) { _requestedCapabilities &= ~DataSourceCapabilities.Page; } } else { _requestedCapabilities |= DataSourceCapabilities.Page; } _startRowIndex = value; } } ////// The number of rows returned by the query that counts the number of rows. Typically /// set by the DataSource. /// public int TotalRowCount { get { return _totalRowCount; } set { _totalRowCount = value; } } ////// DataSource controls would call this for each capability that it handled. /// It would do the bitwise operations to handle determining what capabilities were left /// over at the end for RaiseUnsupportedCapabilitiesError to handle. /// public void AddSupportedCapabilities(DataSourceCapabilities capabilities) { _supportedCapabilities |= capabilities; } ////// Prevents a compiler error because Equals was overridden /// public override int GetHashCode() { return System.Web.Util.HashCodeCombiner.CombineHashCodes(_maximumRows.GetHashCode(), _retrieveTotalRowCount.GetHashCode(), _sortExpression.GetHashCode(), _startRowIndex.GetHashCode(), _totalRowCount.GetHashCode()); } public override bool Equals(object obj) { DataSourceSelectArguments arguments = obj as DataSourceSelectArguments; if (arguments != null) { return ((arguments.MaximumRows == _maximumRows) && (arguments.RetrieveTotalRowCount == _retrieveTotalRowCount) && (arguments.SortExpression == _sortExpression) && (arguments.StartRowIndex == _startRowIndex) && (arguments.TotalRowCount == _totalRowCount)); } return false; } ////// Select implementations would call this method to raise errors on unsupported capabilities. /// public void RaiseUnsupportedCapabilitiesError(DataSourceView view) { DataSourceCapabilities unsupportedCapabilities; unsupportedCapabilities = _requestedCapabilities & ~_supportedCapabilities; if ((unsupportedCapabilities & DataSourceCapabilities.Sort) != 0) { view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.Sort); } if ((unsupportedCapabilities & DataSourceCapabilities.Page) != 0) { view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.Page); } if ((unsupportedCapabilities & DataSourceCapabilities.RetrieveTotalRowCount) != 0) { view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.RetrieveTotalRowCount); } Debug.Assert(unsupportedCapabilities == 0, "unknown capability not supported"); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI { using System.Diagnostics; using System.Security.Permissions; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class DataSourceSelectArguments { private DataSourceCapabilities _requestedCapabilities; private DataSourceCapabilities _supportedCapabilities; private int _maximumRows; private bool _retrieveTotalRowCount; private string _sortExpression; private int _startRowIndex; private int _totalRowCount = -1; public DataSourceSelectArguments() : this(String.Empty, 0, 0) { } public DataSourceSelectArguments(string sortExpression) : this(sortExpression, 0, 0) { } public DataSourceSelectArguments(int startRowIndex, int maximumRows) : this(String.Empty, startRowIndex, maximumRows) { } public DataSourceSelectArguments(string sortExpression, int startRowIndex, int maximumRows) { SortExpression = sortExpression; StartRowIndex = startRowIndex; MaximumRows = maximumRows; } // Empty cannot be a static readonly field because we want each requester to get their own copy. // This is because DataSourceViews need to call AddSupportedCapabilities on the DataSourceSelectArguments, // changing it to be suited to the DataSourceView's needs. If another DataSourceView used the same instance, // the supported capabilities would be wrong. This member stays as a property for programming ease and // returns a new instance each time. If the user wants to change this instance, they're free to. public static DataSourceSelectArguments Empty { get { return new DataSourceSelectArguments(); } } ////// The maximum number of rows requested for a paged data request. /// Use 0 to indicate all rows. /// public int MaximumRows { get { return _maximumRows; } set { if (value == 0) { if (_startRowIndex == 0) { _requestedCapabilities &= ~DataSourceCapabilities.Page; } } else { _requestedCapabilities |= DataSourceCapabilities.Page; } _maximumRows = value; } } ////// Indicates whether the total row count is requested /// public bool RetrieveTotalRowCount { get { return _retrieveTotalRowCount; } set { if (value) { _requestedCapabilities |= DataSourceCapabilities.RetrieveTotalRowCount; } else { _requestedCapabilities &= ~DataSourceCapabilities.RetrieveTotalRowCount; } _retrieveTotalRowCount = value; } } ////// The expression used to sort the data. /// public string SortExpression { get { if (_sortExpression == null) _sortExpression = String.Empty; return _sortExpression; } set { if (String.IsNullOrEmpty(value)) { _requestedCapabilities &= ~DataSourceCapabilities.Sort; } else { _requestedCapabilities |= DataSourceCapabilities.Sort; } _sortExpression = value; } } ////// The index of the first row requested for a paged data request /// public int StartRowIndex { get { return _startRowIndex; } set { if (value == 0) { if (_maximumRows == 0) { _requestedCapabilities &= ~DataSourceCapabilities.Page; } } else { _requestedCapabilities |= DataSourceCapabilities.Page; } _startRowIndex = value; } } ////// The number of rows returned by the query that counts the number of rows. Typically /// set by the DataSource. /// public int TotalRowCount { get { return _totalRowCount; } set { _totalRowCount = value; } } ////// DataSource controls would call this for each capability that it handled. /// It would do the bitwise operations to handle determining what capabilities were left /// over at the end for RaiseUnsupportedCapabilitiesError to handle. /// public void AddSupportedCapabilities(DataSourceCapabilities capabilities) { _supportedCapabilities |= capabilities; } ////// Prevents a compiler error because Equals was overridden /// public override int GetHashCode() { return System.Web.Util.HashCodeCombiner.CombineHashCodes(_maximumRows.GetHashCode(), _retrieveTotalRowCount.GetHashCode(), _sortExpression.GetHashCode(), _startRowIndex.GetHashCode(), _totalRowCount.GetHashCode()); } public override bool Equals(object obj) { DataSourceSelectArguments arguments = obj as DataSourceSelectArguments; if (arguments != null) { return ((arguments.MaximumRows == _maximumRows) && (arguments.RetrieveTotalRowCount == _retrieveTotalRowCount) && (arguments.SortExpression == _sortExpression) && (arguments.StartRowIndex == _startRowIndex) && (arguments.TotalRowCount == _totalRowCount)); } return false; } ////// Select implementations would call this method to raise errors on unsupported capabilities. /// public void RaiseUnsupportedCapabilitiesError(DataSourceView view) { DataSourceCapabilities unsupportedCapabilities; unsupportedCapabilities = _requestedCapabilities & ~_supportedCapabilities; if ((unsupportedCapabilities & DataSourceCapabilities.Sort) != 0) { view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.Sort); } if ((unsupportedCapabilities & DataSourceCapabilities.Page) != 0) { view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.Page); } if ((unsupportedCapabilities & DataSourceCapabilities.RetrieveTotalRowCount) != 0) { view.RaiseUnsupportedCapabilityError(DataSourceCapabilities.RetrieveTotalRowCount); } Debug.Assert(unsupportedCapabilities == 0, "unknown capability not supported"); } } } // 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
- XmlSchemaChoice.cs
- PhysicalFontFamily.cs
- SchemaDeclBase.cs
- ItemList.cs
- NetNamedPipeBinding.cs
- PieceDirectory.cs
- DataControlField.cs
- PropertyPathConverter.cs
- DoubleCollection.cs
- sortedlist.cs
- BinaryUtilClasses.cs
- ProjectionCamera.cs
- NamedServiceModelExtensionCollectionElement.cs
- Shape.cs
- DbConnectionHelper.cs
- XmlSchemaParticle.cs
- ZipPackagePart.cs
- RSAPKCS1KeyExchangeDeformatter.cs
- SignatureDescription.cs
- CustomSignedXml.cs
- InputLangChangeRequestEvent.cs
- SoapTypeAttribute.cs
- TemplateFactory.cs
- XmlDeclaration.cs
- SmiXetterAccessMap.cs
- SparseMemoryStream.cs
- ButtonFlatAdapter.cs
- RuleInfoComparer.cs
- EventInfo.cs
- XmlSchemaAppInfo.cs
- DomNameTable.cs
- FactoryId.cs
- ProfilePropertySettingsCollection.cs
- TriggerActionCollection.cs
- WorkflowViewService.cs
- OracleDateTime.cs
- FocusChangedEventArgs.cs
- UnionExpr.cs
- DbCommandDefinition.cs
- Trace.cs
- MethodBuilder.cs
- SqlInternalConnectionSmi.cs
- HttpListener.cs
- SizeAnimation.cs
- ItemCheckEvent.cs
- Int32EqualityComparer.cs
- WebPartChrome.cs
- ExpressionBuilderCollection.cs
- NamedPipeHostedTransportConfiguration.cs
- NativeConfigurationLoader.cs
- DbProviderManifest.cs
- ObjectQuery_EntitySqlExtensions.cs
- RelationshipDetailsRow.cs
- StoreContentChangedEventArgs.cs
- ContextQuery.cs
- DeviceFilterEditorDialog.cs
- UnaryExpressionHelper.cs
- HiddenField.cs
- XsltArgumentList.cs
- TreeWalkHelper.cs
- DropSource.cs
- OptionalRstParameters.cs
- ReturnValue.cs
- SafeHandles.cs
- MSG.cs
- TraceSection.cs
- FontUnitConverter.cs
- InternalTypeHelper.cs
- NamedObject.cs
- BuilderPropertyEntry.cs
- EdmPropertyAttribute.cs
- HandlerWithFactory.cs
- SecurityDescriptor.cs
- TrustLevel.cs
- RightsManagementSuppressedStream.cs
- UpdateTracker.cs
- MarkupCompilePass2.cs
- XmlNodeChangedEventManager.cs
- DataSource.cs
- BoundConstants.cs
- MenuItemBinding.cs
- MethodRental.cs
- CodeBlockBuilder.cs
- Error.cs
- diagnosticsswitches.cs
- TextServicesCompartmentContext.cs
- RemoteArgument.cs
- Subtree.cs
- BooleanConverter.cs
- ButtonChrome.cs
- CfgSemanticTag.cs
- XmlSchemaDocumentation.cs
- CommandManager.cs
- TemplateBindingExpression.cs
- PenLineCapValidation.cs
- VSWCFServiceContractGenerator.cs
- DynamicActivity.cs
- ProcessHostMapPath.cs
- LicFileLicenseProvider.cs
- ErrorWebPart.cs