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
- DesignTable.cs
- DataControlFieldCollection.cs
- RectAnimationBase.cs
- COM2ExtendedBrowsingHandler.cs
- SafeRightsManagementPubHandle.cs
- ReturnType.cs
- GrowingArray.cs
- FixedSOMImage.cs
- ExceptionUtil.cs
- ClientScriptManager.cs
- OleStrCAMarshaler.cs
- DocumentViewerHelper.cs
- QueryAccessibilityHelpEvent.cs
- ByteBufferPool.cs
- Content.cs
- IisTraceListener.cs
- DataServiceSaveChangesEventArgs.cs
- BamlResourceContent.cs
- ProgressBarRenderer.cs
- KeyNotFoundException.cs
- ElementHost.cs
- X509RecipientCertificateClientElement.cs
- RequestCache.cs
- TextContainerHelper.cs
- WebPartsPersonalization.cs
- Token.cs
- PageRanges.cs
- ExpressionBuilder.cs
- OperationDescription.cs
- ProxyHelper.cs
- ToolStripContentPanel.cs
- BitVector32.cs
- ThousandthOfEmRealDoubles.cs
- TakeOrSkipQueryOperator.cs
- DefaultDialogButtons.cs
- Select.cs
- XmlSchemaCompilationSettings.cs
- StringAnimationUsingKeyFrames.cs
- Int32Rect.cs
- TimeIntervalCollection.cs
- Lazy.cs
- URLAttribute.cs
- Stroke.cs
- XmlSchemaAttribute.cs
- FixedSOMTextRun.cs
- XPathSingletonIterator.cs
- StreamMarshaler.cs
- ValidationErrorEventArgs.cs
- XmlStreamNodeWriter.cs
- AspNetHostingPermission.cs
- EncryptedPackage.cs
- WebAdminConfigurationHelper.cs
- StatusBarPanel.cs
- MethodSet.cs
- CompilerCollection.cs
- ChannelSinkStacks.cs
- XmlSigningNodeWriter.cs
- TreePrinter.cs
- SignatureToken.cs
- Regex.cs
- DBProviderConfigurationHandler.cs
- FilterQueryOptionExpression.cs
- MouseActionValueSerializer.cs
- ExpressionBuilder.cs
- SystemDiagnosticsSection.cs
- InternalPolicyElement.cs
- StreamSecurityUpgradeInitiatorBase.cs
- HierarchicalDataBoundControl.cs
- DbConnectionFactory.cs
- MapPathBasedVirtualPathProvider.cs
- NeutralResourcesLanguageAttribute.cs
- SystemResources.cs
- OracleParameter.cs
- NativeRecognizer.cs
- Literal.cs
- DetailsViewUpdatedEventArgs.cs
- SBCSCodePageEncoding.cs
- ArrangedElement.cs
- DataBoundControlHelper.cs
- SchemaConstraints.cs
- _OverlappedAsyncResult.cs
- CodeMethodReturnStatement.cs
- SafeLibraryHandle.cs
- PageCodeDomTreeGenerator.cs
- ZoomPercentageConverter.cs
- BuildManagerHost.cs
- TreeNode.cs
- WeakHashtable.cs
- ValueProviderWrapper.cs
- MouseDevice.cs
- TextSpanModifier.cs
- XmlBaseWriter.cs
- TextBoxLine.cs
- OLEDB_Util.cs
- FormViewRow.cs
- DataGridColumnCollectionEditor.cs
- WizardForm.cs
- FamilyMapCollection.cs
- EntityDataSource.cs
- CodeCommentStatement.cs