Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / HierarchicalDataSourceDesigner.cs / 1 / HierarchicalDataSourceDesigner.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.Design { using System.ComponentModel; using System.Collections; using System.ComponentModel.Design; using System.Design; using System.Drawing; ///[System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)] public class HierarchicalDataSourceDesigner : ControlDesigner, IHierarchicalDataSourceDesigner { private event EventHandler _dataSourceChangedEvent; private event EventHandler _schemaRefreshedEvent; private int _suppressEventsCount; private bool _raiseDataSourceChangedEvent; private bool _raiseSchemaRefreshedEvent; /// public override DesignerActionListCollection ActionLists { get { DesignerActionListCollection actionLists = new DesignerActionListCollection(); actionLists.AddRange(base.ActionLists); actionLists.Add(new HierarchicalDataSourceDesignerActionList(this)); return actionLists; } } /// /// /// Indicates whether the Configure() method can be called. /// public virtual bool CanConfigure { get { return false; } } ////// /// Indicates whether the RefreshSchema() method can be called. /// public virtual bool CanRefreshSchema { get { return false; } } ////// Raised when the properties of a DataControl have changed. This allows /// a data-bound control designer to take actions to refresh its /// control in the designer. /// public event EventHandler DataSourceChanged { add { _dataSourceChangedEvent += value; } remove { _dataSourceChangedEvent -= value; } } ////// Raised when the schema of the DataSource has changed. This notifies /// a data-bound control designer that the available schema fields have /// changed. /// public event EventHandler SchemaRefreshed { add { _schemaRefreshedEvent += value; } remove { _schemaRefreshedEvent -= value; } } protected bool SuppressingDataSourceEvents { get { return (_suppressEventsCount > 0); } } ////// /// Launches the data source's configuration wizard. /// This method should only be called if the CanConfigure property is true. /// public virtual void Configure() { throw new NotSupportedException(); } ////// /// Gets the design-time HTML. /// public override string GetDesignTimeHtml() { return CreatePlaceHolderDesignTimeHtml(); } public virtual DesignerHierarchicalDataSourceView GetView(string viewPath) { return null; } ////// Raises the DataSourceChanged ecent. /// protected virtual void OnDataSourceChanged(EventArgs e) { if (SuppressingDataSourceEvents) { _raiseDataSourceChangedEvent = true; return; } if (_dataSourceChangedEvent != null) { _dataSourceChangedEvent(this, e); } _raiseDataSourceChangedEvent = false; } ////// Raises the SchemaRefreshed event. /// protected virtual void OnSchemaRefreshed(EventArgs e) { if (SuppressingDataSourceEvents) { _raiseSchemaRefreshedEvent = true; return; } if (_schemaRefreshedEvent != null) { _schemaRefreshedEvent(this, e); } _raiseSchemaRefreshedEvent = false; } public virtual void RefreshSchema(bool preferSilent) { throw new NotSupportedException(); } public virtual void ResumeDataSourceEvents() { if (_suppressEventsCount == 0) { throw new InvalidOperationException(SR.GetString(SR.DataSource_CannotResumeEvents)); } _suppressEventsCount--; if (_suppressEventsCount == 0) { // If this is the last call to resume, we raise the events if necessary if (_raiseDataSourceChangedEvent) { OnDataSourceChanged(EventArgs.Empty); } if (_raiseSchemaRefreshedEvent) { OnSchemaRefreshed(EventArgs.Empty); } } } public virtual void SuppressDataSourceEvents() { _suppressEventsCount++; } private class HierarchicalDataSourceDesignerActionList : DesignerActionList { private HierarchicalDataSourceDesigner _parent; public HierarchicalDataSourceDesignerActionList(HierarchicalDataSourceDesigner parent) : base(parent.Component) { _parent = parent; } public override bool AutoShow { get { return true; } set { } } public void Configure() { _parent.Configure(); } public void RefreshSchema() { _parent.RefreshSchema(false); } public override DesignerActionItemCollection GetSortedActionItems() { DesignerActionItemCollection items = new DesignerActionItemCollection(); if (_parent.CanConfigure) { DesignerActionMethodItem methodItem = new DesignerActionMethodItem(this, "Configure", SR.GetString(SR.DataSourceDesigner_ConfigureDataSourceVerb), SR.GetString(SR.DataSourceDesigner_DataActionGroup), SR.GetString(SR.DataSourceDesigner_ConfigureDataSourceVerbDesc), true); methodItem.AllowAssociate = true; items.Add(methodItem); } if (_parent.CanRefreshSchema) { DesignerActionMethodItem methodItem = new DesignerActionMethodItem(this, "RefreshSchema", SR.GetString(SR.DataSourceDesigner_RefreshSchemaVerb), SR.GetString(SR.DataSourceDesigner_DataActionGroup), SR.GetString(SR.DataSourceDesigner_RefreshSchemaVerbDesc), false); methodItem.AllowAssociate = true; items.Add(methodItem); } return items; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SqlCachedBuffer.cs
- SoapEnumAttribute.cs
- SettingsPropertyValue.cs
- RelationshipDetailsCollection.cs
- IpcClientChannel.cs
- UserControlCodeDomTreeGenerator.cs
- RenamedEventArgs.cs
- ActivityExecutor.cs
- HashHelper.cs
- NeutralResourcesLanguageAttribute.cs
- WindowHideOrCloseTracker.cs
- XamlInt32CollectionSerializer.cs
- EventManager.cs
- SessionStateUtil.cs
- MonitoringDescriptionAttribute.cs
- WebConfigurationHost.cs
- TextCompositionManager.cs
- ConfigXmlComment.cs
- RsaKeyGen.cs
- PeerName.cs
- ObjectAnimationBase.cs
- BordersPage.cs
- MetadataCollection.cs
- DisposableCollectionWrapper.cs
- ListBase.cs
- ServiceConfigurationTraceRecord.cs
- ReflectTypeDescriptionProvider.cs
- Invariant.cs
- HtmlInputText.cs
- CapacityStreamGeometryContext.cs
- BasicViewGenerator.cs
- AcceptorSessionSymmetricMessageSecurityProtocol.cs
- HttpListenerContext.cs
- IsolatedStoragePermission.cs
- CompensationHandlingFilter.cs
- XPathEmptyIterator.cs
- ContentDisposition.cs
- Assert.cs
- EastAsianLunisolarCalendar.cs
- XmlILAnnotation.cs
- RemoteWebConfigurationHostStream.cs
- SqlUdtInfo.cs
- Predicate.cs
- filewebresponse.cs
- Shape.cs
- StyleHelper.cs
- ComplexBindingPropertiesAttribute.cs
- IResourceProvider.cs
- SoapExtensionTypeElement.cs
- CompilationUtil.cs
- Misc.cs
- FlowNode.cs
- PackagePart.cs
- Rijndael.cs
- BCLDebug.cs
- ZoneButton.cs
- LineServicesCallbacks.cs
- SettingsPropertyWrongTypeException.cs
- SystemThemeKey.cs
- UniqueID.cs
- HeaderCollection.cs
- MbpInfo.cs
- StrongNameHelpers.cs
- RewritingValidator.cs
- LoginStatusDesigner.cs
- Point3DAnimation.cs
- IisTraceListener.cs
- StorageConditionPropertyMapping.cs
- __ComObject.cs
- OdbcHandle.cs
- CollectionChangedEventManager.cs
- DataGridViewCellStyle.cs
- ValidatedControlConverter.cs
- NonDualMessageSecurityOverHttp.cs
- FixedPage.cs
- TransactionInterop.cs
- TraceHandlerErrorFormatter.cs
- ListBoxItem.cs
- RowToFieldTransformer.cs
- dbdatarecord.cs
- CodeExpressionStatement.cs
- InvocationExpression.cs
- UMPAttributes.cs
- AnnotationComponentManager.cs
- PathFigure.cs
- FontWeight.cs
- dtdvalidator.cs
- FullTextLine.cs
- FileRecordSequenceCompletedAsyncResult.cs
- _ProxyChain.cs
- DataGridTableStyleMappingNameEditor.cs
- metrodevice.cs
- CompiledIdentityConstraint.cs
- DropTarget.cs
- CommonXSendMessage.cs
- InputReportEventArgs.cs
- FrameDimension.cs
- ManagementObject.cs
- Rotation3DKeyFrameCollection.cs
- SafeHandles.cs