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
- PinnedBufferMemoryStream.cs
- BaseDataListDesigner.cs
- DataViewSettingCollection.cs
- DbCommandDefinition.cs
- FolderLevelBuildProvider.cs
- ButtonAutomationPeer.cs
- MultiView.cs
- PerformanceCounter.cs
- UInt16Converter.cs
- WorkflowCompensationBehavior.cs
- WebBrowserPermission.cs
- UInt16.cs
- IndexingContentUnit.cs
- TableColumn.cs
- HttpPostClientProtocol.cs
- JoinTreeSlot.cs
- ObjectParameter.cs
- BufferedGraphics.cs
- ValidationHelper.cs
- AuthenticationConfig.cs
- ResolveCriteria.cs
- HashCodeCombiner.cs
- Rotation3DAnimationUsingKeyFrames.cs
- PolicyException.cs
- CreateUserWizardStep.cs
- linebase.cs
- AdornerPresentationContext.cs
- SHA256CryptoServiceProvider.cs
- XmlFormatExtensionPrefixAttribute.cs
- UnionQueryOperator.cs
- Label.cs
- Int16.cs
- DataSourceProvider.cs
- MouseGesture.cs
- DataGridPagingPage.cs
- KeyValuePairs.cs
- ListenDesigner.cs
- CuspData.cs
- MediaPlayerState.cs
- externdll.cs
- SettingsProviderCollection.cs
- TemplateParser.cs
- ProxyGenerationError.cs
- SQLChars.cs
- ISAPIRuntime.cs
- ToolStripContainer.cs
- UnionExpr.cs
- InvalidFilterCriteriaException.cs
- HtmlShimManager.cs
- SqlUdtInfo.cs
- StubHelpers.cs
- IResourceProvider.cs
- DrawListViewItemEventArgs.cs
- UnauthorizedWebPart.cs
- TakeQueryOptionExpression.cs
- HMACSHA1.cs
- DataGridAddNewRow.cs
- UserValidatedEventArgs.cs
- WorkflowRuntimeServiceElementCollection.cs
- ListDictionaryInternal.cs
- DataGridCaption.cs
- Axis.cs
- Misc.cs
- StackBuilderSink.cs
- ContextMarshalException.cs
- XhtmlBasicSelectionListAdapter.cs
- ReferenceService.cs
- StreamSecurityUpgradeInitiatorBase.cs
- EncoderParameter.cs
- ProtocolsConfigurationEntry.cs
- InProcStateClientManager.cs
- FileDetails.cs
- CommandID.cs
- CachedFontFamily.cs
- ParameterDataSourceExpression.cs
- SHA1CryptoServiceProvider.cs
- XPathAncestorQuery.cs
- RNGCryptoServiceProvider.cs
- CustomError.cs
- ScriptReferenceBase.cs
- FilterEventArgs.cs
- TextEditorParagraphs.cs
- Expression.cs
- TransportSecurityProtocolFactory.cs
- RegisteredExpandoAttribute.cs
- SystemThemeKey.cs
- Deserializer.cs
- TableProviderWrapper.cs
- SystemColorTracker.cs
- DataGridViewRowEventArgs.cs
- SafeCryptContextHandle.cs
- FamilyTypeface.cs
- DesignerRegion.cs
- WebControlAdapter.cs
- WinInet.cs
- SiteMembershipCondition.cs
- BulletedList.cs
- ControlAdapter.cs
- BitmapData.cs
- MetadataItem.cs