Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / 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
- ComponentCommands.cs
- ImageListImageEditor.cs
- StylusCollection.cs
- XmlStringTable.cs
- CustomTypeDescriptor.cs
- AssemblyNameProxy.cs
- HGlobalSafeHandle.cs
- OutputCacheSettingsSection.cs
- ZipIOZip64EndOfCentralDirectoryLocatorBlock.cs
- AesCryptoServiceProvider.cs
- AppDomain.cs
- HttpApplication.cs
- DSASignatureDeformatter.cs
- DataBoundControlHelper.cs
- CrossAppDomainChannel.cs
- XmlReader.cs
- XamlHostingSection.cs
- X509Certificate.cs
- CodeSubDirectoriesCollection.cs
- RightsManagementPermission.cs
- DetailsViewInsertedEventArgs.cs
- LayoutExceptionEventArgs.cs
- XmlSchemaGroup.cs
- DbProviderFactoriesConfigurationHandler.cs
- HitTestFilterBehavior.cs
- WebServiceErrorEvent.cs
- PermissionRequestEvidence.cs
- RewritingPass.cs
- ExpressionBuilder.cs
- EnvelopedSignatureTransform.cs
- EntityDataSourceDataSelection.cs
- ByteAnimation.cs
- coordinator.cs
- URLMembershipCondition.cs
- SessionParameter.cs
- ToolStripDropDownItem.cs
- ItemsControlAutomationPeer.cs
- WebPartEditorCancelVerb.cs
- ImageCodecInfo.cs
- ToolStripDropDownClosedEventArgs.cs
- ManagementOptions.cs
- DiscoveryServerProtocol.cs
- ObfuscationAttribute.cs
- IOThreadScheduler.cs
- PenCursorManager.cs
- ColumnMapTranslator.cs
- LinkedResourceCollection.cs
- oledbconnectionstring.cs
- WebServiceClientProxyGenerator.cs
- CreateInstanceBinder.cs
- ContainerParaClient.cs
- StreamGeometry.cs
- ControlParameter.cs
- X509ImageLogo.cs
- MetadataItemEmitter.cs
- SafeMILHandle.cs
- RuntimeResourceSet.cs
- TextTreeText.cs
- HttpHandler.cs
- DriveNotFoundException.cs
- ContextMarshalException.cs
- future.cs
- PenLineCapValidation.cs
- ScriptComponentDescriptor.cs
- CodeExporter.cs
- JsonReaderDelegator.cs
- RenderingEventArgs.cs
- TickBar.cs
- CodeTypeMember.cs
- DataRecordInfo.cs
- DataGridViewSelectedCellsAccessibleObject.cs
- DbFunctionCommandTree.cs
- ThreadLocal.cs
- DataGridSortCommandEventArgs.cs
- ParameterModifier.cs
- RightsManagementPermission.cs
- TextOnlyOutput.cs
- ControlIdConverter.cs
- X509CertificateClaimSet.cs
- NameValueSectionHandler.cs
- Authorization.cs
- SchemaSetCompiler.cs
- Button.cs
- WindowInteropHelper.cs
- ListSourceHelper.cs
- validationstate.cs
- RotateTransform.cs
- Menu.cs
- OperationCanceledException.cs
- CatalogPart.cs
- AdPostCacheSubstitution.cs
- LateBoundBitmapDecoder.cs
- UriExt.cs
- XmlWriterDelegator.cs
- arabicshape.cs
- StructuredTypeEmitter.cs
- RangeBase.cs
- PackWebResponse.cs
- CrossContextChannel.cs
- ConfigUtil.cs