Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / TransformerConfigurationWizardBase.cs / 1 / TransformerConfigurationWizardBase.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls.WebParts { using System; using System.ComponentModel; using System.Diagnostics; using System.Web.UI.WebControls; internal abstract class TransformerConfigurationWizardBase : Wizard, ITransformerConfigurationControl { private string[] _oldProviderNames; private string[] _oldConsumerNames; private const int baseIndex = 0; private const int oldProviderNamesIndex = 1; private const int oldConsumerNamesIndex = 2; private const int controlStateArrayLength = 3; private static readonly object EventCancelled = new object(); private static readonly object EventSucceeded = new object(); protected abstract PropertyDescriptorCollection ConsumerSchema { get; } protected string[] OldConsumerNames { get { return _oldConsumerNames; } set { _oldConsumerNames = value; } } protected string[] OldProviderNames { get { return _oldProviderNames; } set { _oldProviderNames = value; } } protected abstract PropertyDescriptorCollection ProviderSchema { get; } public event EventHandler Cancelled { add { Events.AddHandler(EventCancelled, value); } remove { Events.RemoveHandler(EventCancelled, value); } } public event EventHandler Succeeded { add { Events.AddHandler(EventSucceeded, value); } remove { Events.RemoveHandler(EventSucceeded, value); } } protected abstract void CreateWizardSteps(); protected internal override void LoadControlState(object savedState) { if (savedState == null) { // Create wizard steps before loading base ControlState. CreateWizardSteps(); base.LoadControlState(null); } else { object[] myState = (object[])savedState; if (myState.Length != controlStateArrayLength) { throw new ArgumentException(SR.GetString(SR.Invalid_ControlState)); } if (myState[oldProviderNamesIndex] != null) { OldProviderNames = (string[])myState[oldProviderNamesIndex]; } if (myState[oldConsumerNamesIndex] != null) { OldConsumerNames = (string[])myState[oldConsumerNamesIndex]; } // Create wizard steps before loading base ControlState. CreateWizardSteps(); base.LoadControlState(myState[baseIndex]); } } protected override void OnCancelButtonClick(EventArgs e) { OnCancelled(EventArgs.Empty); base.OnCancelButtonClick(e); } private void OnCancelled(EventArgs e) { EventHandler handler = (EventHandler)Events[EventCancelled]; if (handler != null) { handler(this, e); } } protected override void OnFinishButtonClick(WizardNavigationEventArgs e) { OnSucceeded(EventArgs.Empty); base.OnFinishButtonClick(e); } protected internal override void OnInit(EventArgs e) { DisplayCancelButton = true; DisplaySideBar = false; if (Page != null) { Page.RegisterRequiresControlState(this); Page.PreRenderComplete += new EventHandler(this.OnPagePreRenderComplete); } base.OnInit(e); } private void OnPagePreRenderComplete(object sender, EventArgs e) { // Copy current schemas into arrays string[] providerNames = ConvertSchemaToArray(ProviderSchema); string[] consumerNames = ConvertSchemaToArray(ConsumerSchema); // If current schemas are not the same as the old schemas, or if the WizardSteps have // not been created yet, update the old schemas and recreate the Wizard steps. if (StringArraysDifferent(providerNames, OldProviderNames) || StringArraysDifferent(consumerNames, OldConsumerNames) || WizardSteps.Count == 0) { OldProviderNames = providerNames; OldConsumerNames = consumerNames; WizardSteps.Clear(); ClearChildState(); CreateWizardSteps(); ActiveStepIndex = 0; } // We should always have at least 1 WizardStep before we Render Debug.Assert(WizardSteps.Count > 0); } private string[] ConvertSchemaToArray(PropertyDescriptorCollection schema) { string[] names = null; if (schema != null && schema.Count > 0) { names = new string[schema.Count * 2]; for (int i=0; i < schema.Count; i++) { PropertyDescriptor descriptor = schema[i]; if (descriptor != null) { names[2*i] = descriptor.DisplayName; names[2*i + 1] = descriptor.Name; } } } return names; } private void OnSucceeded(EventArgs e) { EventHandler handler = (EventHandler)Events[EventSucceeded]; if (handler != null) { handler(this, e); } } protected internal override object SaveControlState() { object[] myState = new object[controlStateArrayLength]; myState[baseIndex] = base.SaveControlState(); myState[oldProviderNamesIndex] = OldProviderNames; myState[oldConsumerNamesIndex] = OldConsumerNames; for (int i=0; i < controlStateArrayLength; i++) { if (myState[i] != null) { return myState; } } // More performant to return null than an array of null values return null; } private bool StringArraysDifferent(string[] arrA, string[] arrB) { int lengthA = (arrA == null) ? 0 : arrA.Length; int lengthB = (arrB == null) ? 0 : arrB.Length; if (lengthA != lengthB) { return true; } else { for (int i=0; i < lengthB; i++) { if (arrA[i] != arrB[i]) { return true; } } } return false; } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- MsdtcWrapper.cs
- Base64Stream.cs
- ThemeDirectoryCompiler.cs
- CustomValidator.cs
- Util.cs
- TextSerializer.cs
- TextContainerChangedEventArgs.cs
- AssemblyCache.cs
- SoapSchemaExporter.cs
- FontDriver.cs
- ContractReference.cs
- webclient.cs
- ConstraintCollection.cs
- CounterSample.cs
- DiscoveryMessageSequenceGenerator.cs
- Misc.cs
- SoapSchemaExporter.cs
- TrackingDataItemValue.cs
- CheckableControlBaseAdapter.cs
- SignatureResourcePool.cs
- ScrollItemPattern.cs
- Transform.cs
- DesignerLoader.cs
- HeaderUtility.cs
- ScaleTransform3D.cs
- __ConsoleStream.cs
- FontSourceCollection.cs
- _Rfc2616CacheValidators.cs
- ConfigurationSection.cs
- FileIOPermission.cs
- InternalCache.cs
- CommonDialog.cs
- PtsContext.cs
- FlowLayoutPanelDesigner.cs
- RegexCompiler.cs
- SyndicationItemFormatter.cs
- _SafeNetHandles.cs
- TextServicesContext.cs
- StorageBasedPackageProperties.cs
- WebPartDescription.cs
- BuildProvider.cs
- ListDependantCardsRequest.cs
- DataGridViewComboBoxEditingControl.cs
- ExtendedPropertyDescriptor.cs
- NopReturnReader.cs
- NotifyInputEventArgs.cs
- ElementHostAutomationPeer.cs
- DataGridViewCheckBoxCell.cs
- WindowsRichEdit.cs
- _MultipleConnectAsync.cs
- Int16AnimationBase.cs
- HttpCacheVaryByContentEncodings.cs
- BeginStoryboard.cs
- DataServiceProviderWrapper.cs
- CopyOfAction.cs
- SqlConnectionString.cs
- RowUpdatedEventArgs.cs
- ServicePointManager.cs
- TextTreeInsertUndoUnit.cs
- MsmqIntegrationReceiveParameters.cs
- SourceFilter.cs
- WorkflowInstanceTerminatedRecord.cs
- Misc.cs
- GridViewUpdatedEventArgs.cs
- StylusCollection.cs
- WebEvents.cs
- DbException.cs
- AppliedDeviceFiltersDialog.cs
- SyndicationCategory.cs
- SendMessageContent.cs
- Queue.cs
- SqlDataSourceCache.cs
- TempEnvironment.cs
- ValidateNames.cs
- ButtonFlatAdapter.cs
- XpsS0ValidatingLoader.cs
- EditCommandColumn.cs
- SafeBitVector32.cs
- MostlySingletonList.cs
- ValuePattern.cs
- ComponentEditorForm.cs
- DecoderFallbackWithFailureFlag.cs
- RequestQueue.cs
- Message.cs
- LogReserveAndAppendState.cs
- HttpBindingExtension.cs
- LicenseProviderAttribute.cs
- ProcessInputEventArgs.cs
- GridPatternIdentifiers.cs
- NegotiationTokenAuthenticatorStateCache.cs
- SystemIPv4InterfaceProperties.cs
- EncryptedData.cs
- Mappings.cs
- Polyline.cs
- SmiMetaDataProperty.cs
- EventHandlersStore.cs
- ByteStack.cs
- ContextMenuStripGroup.cs
- PowerStatus.cs
- DataGridColumnCollection.cs