Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / Diagnostics / Switch.cs / 1 / Switch.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Diagnostics { using System; using System.Security; using System.Security.Permissions; using System.Threading; using System.Runtime.InteropServices; using Microsoft.Win32; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Globalization; using System.Configuration; using System.Xml.Serialization; ////// public abstract class Switch { private SwitchElementsCollection switchSettings; private string description; private string displayName; private int switchSetting = 0; private bool initialized = false; private bool initializing = false; private string switchValueString = String.Empty; private StringDictionary attributes; private string defaultValue; private static ListProvides an ///base class to /// create new debugging and tracing switches. switches = new List (); /// /// protected Switch(string displayName, string description) : this(displayName, description, "0") { } protected Switch(string displayName, string description, string defaultSwitchValue) { // displayName is used as a hashtable key, so it can never // be null. if (displayName == null) displayName = string.Empty; this.displayName = displayName; this.description = description; lock (switches) { switches.Add(new WeakReference(this)); } defaultValue = defaultSwitchValue; } [XmlIgnore] public StringDictionary Attributes { get { Initialize(); if (attributes == null) attributes = new StringDictionary(); return attributes; } } ///Initializes a new instance of the ////// class. /// public string DisplayName { get { return displayName; } } ///Gets a name used to identify the switch. ////// public string Description { get { return (description == null) ? string.Empty : description; } } ///Gets a description of the switch. ////// protected int SwitchSetting { get { if (!initialized) { if (!InitializeWithStatus()) return 0; OnSwitchSettingChanged(); } return switchSetting; } set { initialized = true; if (switchSetting != value) { switchSetting = value; OnSwitchSettingChanged(); } } } protected string Value { get { Initialize(); return switchValueString; } set { Initialize(); switchValueString = value; try { OnValueChanged(); } catch (ArgumentException e) { throw new ConfigurationErrorsException(SR.GetString(SR.BadConfigSwitchValue, DisplayName), e); } catch (FormatException e) { throw new ConfigurationErrorsException(SR.GetString(SR.BadConfigSwitchValue, DisplayName), e); } catch (OverflowException e) { throw new ConfigurationErrorsException(SR.GetString(SR.BadConfigSwitchValue, DisplayName), e); } } } private void Initialize() { InitializeWithStatus(); } private bool InitializeWithStatus() { if (!initialized) { if (initializing) return false; initializing = true; if (switchSettings == null) { if (!InitializeConfigSettings()) return false; } if (switchSettings != null) { SwitchElement mySettings = switchSettings[displayName]; if (mySettings != null) { string value = mySettings.Value; if (value != null) { this.Value = value; } else this.Value = defaultValue; try { TraceUtils.VerifyAttributes(mySettings.Attributes, GetSupportedAttributes(), this); } catch (ConfigurationException) { // if VerifyAttributes throws, clean up a little bit so we're not in a bad state. initialized = false; initializing = false; throw; } attributes = new StringDictionary(); attributes.contents = mySettings.Attributes; } else { // We don't use the property here because we don't want to catch exceptions // and rethrow them as ConfigurationException. In this case there's no config. switchValueString = defaultValue; OnValueChanged(); } } else { // We don't use the property here because we don't want to catch exceptions // and rethrow them as ConfigurationException. In this case there's no config. switchValueString = defaultValue; OnValueChanged(); } initialized = true; initializing = false; } return true; } private bool InitializeConfigSettings() { if (switchSettings != null) return true; if (!DiagnosticsConfiguration.CanInitialize()) return false; // This hashtable is case-insensitive. switchSettings = DiagnosticsConfiguration.SwitchSettings; return true; } virtual protected internal string[] GetSupportedAttributes() { return null; } ////// Indicates the current setting for this switch. /// ////// This method is invoked when a switch setting has been changed. It will /// be invoked the first time a switch reads its value from the registry /// or environment, and then it will be invoked each time the switch's /// value is changed. /// protected virtual void OnSwitchSettingChanged() { } protected virtual void OnValueChanged() { SwitchSetting = Int32.Parse(Value, CultureInfo.InvariantCulture); } internal static void RefreshAll() { lock (switches) { for (int i=0; i
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CodeCatchClauseCollection.cs
- Padding.cs
- ByteBufferPool.cs
- SmtpNegotiateAuthenticationModule.cs
- RemotingClientProxy.cs
- XsdBuildProvider.cs
- SemaphoreSecurity.cs
- UnknownBitmapDecoder.cs
- TableLayoutRowStyleCollection.cs
- LogEntry.cs
- AssemblyBuilderData.cs
- WindowsIPAddress.cs
- OleDbConnectionPoolGroupProviderInfo.cs
- Listbox.cs
- DSASignatureFormatter.cs
- SafeNativeMethods.cs
- CallbackValidator.cs
- JsonWriter.cs
- Encoder.cs
- DropDownList.cs
- ResourceBinder.cs
- ServicesExceptionNotHandledEventArgs.cs
- CustomSignedXml.cs
- XmlTextReaderImplHelpers.cs
- TransactionInformation.cs
- CompiledQueryCacheEntry.cs
- ArgumentOutOfRangeException.cs
- BindingGraph.cs
- ScriptingWebServicesSectionGroup.cs
- Enlistment.cs
- Timeline.cs
- BulletedListEventArgs.cs
- PropertyRef.cs
- ProcessRequestAsyncResult.cs
- PageHandlerFactory.cs
- AnnotationService.cs
- HtmlTableRowCollection.cs
- DeadCharTextComposition.cs
- DbParameterHelper.cs
- XmlWrappingReader.cs
- FilterQuery.cs
- DataControlCommands.cs
- WebUtil.cs
- ResourceManager.cs
- FilterException.cs
- _TLSstream.cs
- BaseDataList.cs
- PageAsyncTask.cs
- ColorDialog.cs
- IODescriptionAttribute.cs
- PageAdapter.cs
- AsymmetricCryptoHandle.cs
- ManagementOptions.cs
- WebServiceEnumData.cs
- XPathAncestorQuery.cs
- handlecollector.cs
- Emitter.cs
- ResetableIterator.cs
- AmbientProperties.cs
- BindingExpression.cs
- TrackingDataItemValue.cs
- TransportConfigurationTypeElementCollection.cs
- MsmqIntegrationElement.cs
- CalloutQueueItem.cs
- TransactionalPackage.cs
- AutoResetEvent.cs
- DefaultBindingPropertyAttribute.cs
- ValidationSummary.cs
- designeractionlistschangedeventargs.cs
- ConversionContext.cs
- DataBindingValueUIHandler.cs
- AlternateView.cs
- DataGridViewRowHeaderCell.cs
- PanelDesigner.cs
- MbpInfo.cs
- Rotation3DAnimation.cs
- LogConverter.cs
- ConstrainedDataObject.cs
- Model3DGroup.cs
- RoamingStoreFileUtility.cs
- DriveInfo.cs
- SHA384.cs
- JournalEntryStack.cs
- StrokeCollection.cs
- TransactionManager.cs
- TabRenderer.cs
- FrugalMap.cs
- ListViewHitTestInfo.cs
- TransformDescriptor.cs
- HyperlinkAutomationPeer.cs
- XmlSchemaCollection.cs
- VisualBrush.cs
- BinaryNode.cs
- Matrix.cs
- ActivitiesCollection.cs
- TrackBarDesigner.cs
- ToolStripSplitButton.cs
- OLEDB_Enum.cs
- RIPEMD160.cs
- HorizontalAlignConverter.cs