Code:
/ FX-1434 / FX-1434 / 1.0 / 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
- dbdatarecord.cs
- XmlWellformedWriter.cs
- KnownIds.cs
- AutoGeneratedField.cs
- RuntimeCompatibilityAttribute.cs
- DocumentGrid.cs
- ReflectionUtil.cs
- MasterPageBuildProvider.cs
- DefaultValidator.cs
- XPathAxisIterator.cs
- PagesChangedEventArgs.cs
- OdbcException.cs
- RotateTransform.cs
- XslUrlEditor.cs
- ResolvePPIDRequest.cs
- AnnotationComponentChooser.cs
- LoadMessageLogger.cs
- NetworkAddressChange.cs
- ServerValidateEventArgs.cs
- ResourceDescriptionAttribute.cs
- SrgsRule.cs
- SafeFreeMibTable.cs
- HttpHeaderCollection.cs
- StyleSelector.cs
- controlskin.cs
- ResourceFallbackManager.cs
- SchemaNotation.cs
- cookiecontainer.cs
- ObjectHandle.cs
- PropertyChangedEventArgs.cs
- XamlToRtfParser.cs
- DataBoundControlHelper.cs
- ButtonColumn.cs
- SizeF.cs
- CanonicalFontFamilyReference.cs
- ValidationResult.cs
- FacetChecker.cs
- XmlnsCompatibleWithAttribute.cs
- TypeForwardedToAttribute.cs
- MailWebEventProvider.cs
- CapabilitiesState.cs
- DWriteFactory.cs
- BitmapSizeOptions.cs
- FormViewPageEventArgs.cs
- SizeValueSerializer.cs
- SystemIcmpV6Statistics.cs
- SqlClientPermission.cs
- CategoryGridEntry.cs
- HyperLinkStyle.cs
- AddInController.cs
- IsolatedStorageException.cs
- storepermission.cs
- TextComposition.cs
- InternalsVisibleToAttribute.cs
- StringComparer.cs
- Viewport2DVisual3D.cs
- WindowsFormsHelpers.cs
- SplitContainer.cs
- TogglePatternIdentifiers.cs
- HttpStreamMessageEncoderFactory.cs
- GrammarBuilderBase.cs
- AlphabeticalEnumConverter.cs
- X509Certificate2Collection.cs
- ScrollData.cs
- DesignerActionKeyboardBehavior.cs
- MsmqOutputChannel.cs
- GlobalDataBindingHandler.cs
- NativeMethods.cs
- ClientFormsAuthenticationCredentials.cs
- RoleManagerModule.cs
- TextBoxAutomationPeer.cs
- RecognizedAudio.cs
- StatusBar.cs
- PeerName.cs
- CaseInsensitiveOrdinalStringComparer.cs
- ResourceSetExpression.cs
- __ConsoleStream.cs
- SmtpNetworkElement.cs
- RegexCharClass.cs
- MediaSystem.cs
- DataServiceCollectionOfT.cs
- UserCancellationException.cs
- SourceInterpreter.cs
- BuildProvider.cs
- Emitter.cs
- UnsafeNativeMethods.cs
- CodeDirectiveCollection.cs
- BindingNavigator.cs
- WebPartAddingEventArgs.cs
- PasswordRecoveryDesigner.cs
- RoleBoolean.cs
- ToolStripContainerDesigner.cs
- CompiledRegexRunnerFactory.cs
- RuntimeResourceSet.cs
- PolicyException.cs
- TaskSchedulerException.cs
- RecognizedAudio.cs
- FamilyTypeface.cs
- FixedTextBuilder.cs
- EdmPropertyAttribute.cs