Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / DataSourceView.cs / 1305376 / DataSourceView.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI { using System.Collections; using System.ComponentModel; using System.Security.Permissions; public abstract class DataSourceView { private static readonly object EventDataSourceViewChanged = new object(); private EventHandlerList _events; private string _name; protected DataSourceView(IDataSource owner, string viewName) { if (owner == null) { throw new ArgumentNullException("owner"); } if (viewName == null) { throw new ArgumentNullException("viewName"); } _name = viewName; DataSourceControl dataSourceControl = owner as DataSourceControl; if (dataSourceControl != null) { dataSourceControl.DataSourceChangedInternal += new EventHandler(OnDataSourceChangedInternal); } else { owner.DataSourceChanged += new EventHandler(OnDataSourceChangedInternal); } } // CanX properties indicate whether the data source allows each // operation, and if so, whether it's appropriate to do so. // For instance, a control may allow Deletion, but if a required Delete // command isn't set, CanDelete should be false, because a Delete // operation would fail. public virtual bool CanDelete { get { return false; } } public virtual bool CanInsert { get { return false; } } public virtual bool CanPage { get { return false; } } public virtual bool CanRetrieveTotalRowCount { get { return false; } } public virtual bool CanSort { get { return false; } } public virtual bool CanUpdate { get { return false; } } ////// Indicates the list of event handler delegates for the view. This property is read-only. /// protected EventHandlerList Events { get { if (_events == null) { _events = new EventHandlerList(); } return _events; } } public string Name { get { return _name; } } public event EventHandler DataSourceViewChanged { add { Events.AddHandler(EventDataSourceViewChanged, value); } remove { Events.RemoveHandler(EventDataSourceViewChanged, value); } } public virtual bool CanExecute(string commandName) { return false; } public virtual void Delete(IDictionary keys, IDictionary oldValues, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteDelete(keys, oldValues); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } public virtual void ExecuteCommand(string commandName, IDictionary keys, IDictionary values, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteCommand(commandName, keys, values); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } protected virtual int ExecuteCommand(string commandName, IDictionary keys, IDictionary values) { throw new NotSupportedException(); } ////// Performs a delete operation on the specified list. This is only /// supported by a DataSourceControl when CanDelete returns true. /// /// /// The set of name/value pairs used to filter /// the items in the list that should be deleted. /// /// /// The complete set of name/value pairs used to filter /// the items in the list that should be deleted. /// ////// The number of items that were affected by the operation. /// protected virtual int ExecuteDelete(IDictionary keys, IDictionary oldValues) { throw new NotSupportedException(); } ////// Performs an insert operation on the specified list. This is only /// supported by a DataControl when CanInsert is true. /// /// /// The set of name/value pairs to be used to initialize /// a new item in the list. /// ////// The number of items that were affected by the operation. /// protected virtual int ExecuteInsert(IDictionary values) { throw new NotSupportedException(); } ////// protected internal abstract IEnumerable ExecuteSelect(DataSourceSelectArguments arguments); ////// Performs an update operation on the specified list. This is only /// supported by a DataControl when CanUpdate is true. /// /// /// The set of name/value pairs used to filter /// the items in the list that should be updated. /// /// /// The set of name/value pairs to be used to update the /// items in the list. /// /// /// The set of name/value pairs to be used to identify the /// item to be updated. /// ////// The number of items that were affected by the operation. /// protected virtual int ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues) { throw new NotSupportedException(); } private void OnDataSourceChangedInternal(object sender, EventArgs e) { OnDataSourceViewChanged(e); } protected virtual void OnDataSourceViewChanged(EventArgs e) { EventHandler handler = Events[EventDataSourceViewChanged] as EventHandler; if (handler != null) { handler(this, e); } } public virtual void Insert(IDictionary values, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteInsert(values); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } protected internal virtual void RaiseUnsupportedCapabilityError(DataSourceCapabilities capability) { if (!CanPage && ((capability & DataSourceCapabilities.Page) != 0)) { throw new NotSupportedException(SR.GetString(SR.DataSourceView_NoPaging)); } if (!CanSort && ((capability & DataSourceCapabilities.Sort) != 0)) { throw new NotSupportedException(SR.GetString(SR.DataSourceView_NoSorting)); } if (!CanRetrieveTotalRowCount && ((capability & DataSourceCapabilities.RetrieveTotalRowCount) != 0)) { throw new NotSupportedException(SR.GetString(SR.DataSourceView_NoRowCount)); } } public virtual void Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } callback(ExecuteSelect(arguments)); } public virtual void Update(IDictionary keys, IDictionary values, IDictionary oldValues, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteUpdate(keys, values, oldValues); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI { using System.Collections; using System.ComponentModel; using System.Security.Permissions; public abstract class DataSourceView { private static readonly object EventDataSourceViewChanged = new object(); private EventHandlerList _events; private string _name; protected DataSourceView(IDataSource owner, string viewName) { if (owner == null) { throw new ArgumentNullException("owner"); } if (viewName == null) { throw new ArgumentNullException("viewName"); } _name = viewName; DataSourceControl dataSourceControl = owner as DataSourceControl; if (dataSourceControl != null) { dataSourceControl.DataSourceChangedInternal += new EventHandler(OnDataSourceChangedInternal); } else { owner.DataSourceChanged += new EventHandler(OnDataSourceChangedInternal); } } // CanX properties indicate whether the data source allows each // operation, and if so, whether it's appropriate to do so. // For instance, a control may allow Deletion, but if a required Delete // command isn't set, CanDelete should be false, because a Delete // operation would fail. public virtual bool CanDelete { get { return false; } } public virtual bool CanInsert { get { return false; } } public virtual bool CanPage { get { return false; } } public virtual bool CanRetrieveTotalRowCount { get { return false; } } public virtual bool CanSort { get { return false; } } public virtual bool CanUpdate { get { return false; } } ////// Indicates the list of event handler delegates for the view. This property is read-only. /// protected EventHandlerList Events { get { if (_events == null) { _events = new EventHandlerList(); } return _events; } } public string Name { get { return _name; } } public event EventHandler DataSourceViewChanged { add { Events.AddHandler(EventDataSourceViewChanged, value); } remove { Events.RemoveHandler(EventDataSourceViewChanged, value); } } public virtual bool CanExecute(string commandName) { return false; } public virtual void Delete(IDictionary keys, IDictionary oldValues, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteDelete(keys, oldValues); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } public virtual void ExecuteCommand(string commandName, IDictionary keys, IDictionary values, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteCommand(commandName, keys, values); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } protected virtual int ExecuteCommand(string commandName, IDictionary keys, IDictionary values) { throw new NotSupportedException(); } ////// Performs a delete operation on the specified list. This is only /// supported by a DataSourceControl when CanDelete returns true. /// /// /// The set of name/value pairs used to filter /// the items in the list that should be deleted. /// /// /// The complete set of name/value pairs used to filter /// the items in the list that should be deleted. /// ////// The number of items that were affected by the operation. /// protected virtual int ExecuteDelete(IDictionary keys, IDictionary oldValues) { throw new NotSupportedException(); } ////// Performs an insert operation on the specified list. This is only /// supported by a DataControl when CanInsert is true. /// /// /// The set of name/value pairs to be used to initialize /// a new item in the list. /// ////// The number of items that were affected by the operation. /// protected virtual int ExecuteInsert(IDictionary values) { throw new NotSupportedException(); } ////// protected internal abstract IEnumerable ExecuteSelect(DataSourceSelectArguments arguments); ////// Performs an update operation on the specified list. This is only /// supported by a DataControl when CanUpdate is true. /// /// /// The set of name/value pairs used to filter /// the items in the list that should be updated. /// /// /// The set of name/value pairs to be used to update the /// items in the list. /// /// /// The set of name/value pairs to be used to identify the /// item to be updated. /// ////// The number of items that were affected by the operation. /// protected virtual int ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues) { throw new NotSupportedException(); } private void OnDataSourceChangedInternal(object sender, EventArgs e) { OnDataSourceViewChanged(e); } protected virtual void OnDataSourceViewChanged(EventArgs e) { EventHandler handler = Events[EventDataSourceViewChanged] as EventHandler; if (handler != null) { handler(this, e); } } public virtual void Insert(IDictionary values, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteInsert(values); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } protected internal virtual void RaiseUnsupportedCapabilityError(DataSourceCapabilities capability) { if (!CanPage && ((capability & DataSourceCapabilities.Page) != 0)) { throw new NotSupportedException(SR.GetString(SR.DataSourceView_NoPaging)); } if (!CanSort && ((capability & DataSourceCapabilities.Sort) != 0)) { throw new NotSupportedException(SR.GetString(SR.DataSourceView_NoSorting)); } if (!CanRetrieveTotalRowCount && ((capability & DataSourceCapabilities.RetrieveTotalRowCount) != 0)) { throw new NotSupportedException(SR.GetString(SR.DataSourceView_NoRowCount)); } } public virtual void Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } callback(ExecuteSelect(arguments)); } public virtual void Update(IDictionary keys, IDictionary values, IDictionary oldValues, DataSourceViewOperationCallback callback) { if (callback == null) { throw new ArgumentNullException("callback"); } int affectedRecords = 0; bool performedCallback = false; try { affectedRecords = ExecuteUpdate(keys, values, oldValues); } catch (Exception ex) { performedCallback = true; if (!callback(affectedRecords, ex)) { throw; } } finally { if (!performedCallback) { callback(affectedRecords, null); } } } } } // 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
- FloaterBaseParaClient.cs
- WebPartZoneDesigner.cs
- CodeDomConfigurationHandler.cs
- ChannelOptions.cs
- EncryptedPackageFilter.cs
- DataPagerField.cs
- Model3D.cs
- PopupRoot.cs
- XomlCompilerResults.cs
- ASCIIEncoding.cs
- ZoneButton.cs
- Bits.cs
- IntMinMaxAggregationOperator.cs
- ImageButton.cs
- RegularExpressionValidator.cs
- XslException.cs
- BindingContext.cs
- ManifestResourceInfo.cs
- Normalization.cs
- __ConsoleStream.cs
- glyphs.cs
- PriorityRange.cs
- OracleConnectionFactory.cs
- HtmlShim.cs
- ClientRoleProvider.cs
- SkewTransform.cs
- TextBreakpoint.cs
- PersistStreamTypeWrapper.cs
- PointHitTestParameters.cs
- GridToolTip.cs
- XmlSchemaComplexContentRestriction.cs
- HierarchicalDataSourceControl.cs
- RegexInterpreter.cs
- AppDomainUnloadedException.cs
- GCHandleCookieTable.cs
- ContentValidator.cs
- ToolStripSeparator.cs
- UnsafeCollabNativeMethods.cs
- LinkClickEvent.cs
- InvalidPrinterException.cs
- DependencyPropertyDescriptor.cs
- EUCJPEncoding.cs
- DataBoundControlHelper.cs
- SBCSCodePageEncoding.cs
- SortedList.cs
- connectionpool.cs
- PnrpPermission.cs
- SequenceRangeCollection.cs
- RegexTypeEditor.cs
- BlurEffect.cs
- TemplateControlBuildProvider.cs
- xmlsaver.cs
- TableFieldsEditor.cs
- Point3DAnimationUsingKeyFrames.cs
- SubpageParagraph.cs
- TimeZone.cs
- ConfigurationValidatorAttribute.cs
- InputProcessorProfiles.cs
- PropertiesTab.cs
- ImportStoreException.cs
- QilName.cs
- NotifyCollectionChangedEventArgs.cs
- CompositeDuplexBindingElement.cs
- FixedSOMLineCollection.cs
- DependencyObjectPropertyDescriptor.cs
- UIAgentRequest.cs
- SkewTransform.cs
- SecurityHeaderElementInferenceEngine.cs
- PrintPreviewControl.cs
- RegexMatch.cs
- _AutoWebProxyScriptWrapper.cs
- BitmapEffectRenderDataResource.cs
- URI.cs
- ProviderConnectionPointCollection.cs
- TcpProcessProtocolHandler.cs
- XmlHierarchicalEnumerable.cs
- ByteRangeDownloader.cs
- Vector.cs
- AuthenticationModuleElementCollection.cs
- SettingsAttributes.cs
- VideoDrawing.cs
- Grant.cs
- FaultHandlingFilter.cs
- ImageButton.cs
- PageResolution.cs
- DataPagerCommandEventArgs.cs
- Int64.cs
- DesignerVerb.cs
- Attributes.cs
- AssemblyCacheEntry.cs
- XPathChildIterator.cs
- QueryGeneratorBase.cs
- BaseValidator.cs
- MonitoringDescriptionAttribute.cs
- _ConnectStream.cs
- SqlNodeAnnotation.cs
- AppDomainGrammarProxy.cs
- CustomAttributeSerializer.cs
- Rotation3DAnimationBase.cs
- TemplateBamlRecordReader.cs