Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ComponentModel / COM2Interop / COM2Enum.cs / 1305376 / COM2Enum.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.ComponentModel.Com2Interop { using System.ComponentModel; using System.Diagnostics; using System; using System.Collections; using Microsoft.Win32; using System.Globalization; ////// /// This class mimics a clr enum that we can create at runtime. /// It associates an array of names with an array of values and converts /// between them. /// /// A note here: we compare string values when looking for the value of an item. /// Typically these aren't large lists and the perf is worth it. The reason stems /// from IPerPropertyBrowsing, which supplies a list of names and a list of /// variants to mimic enum functionality. If the actual property value is a DWORD, /// which translates to VT_UI4, and they specify their values as VT_I4 (which is a common /// mistake), they won't compare properly and values can't be updated. /// By comparing strings, we avoid this problem and add flexiblity to the system. /// internal class Com2Enum { ////// /// Our array of value string names /// private string[] names; ////// /// Our values /// private object[] values; ////// /// Our cached array of value.ToString()'s /// private string[] stringValues; ////// /// Should we allow values besides what's in the listbox? /// private bool allowUnknownValues; ////// /// Our one and only ctor /// public Com2Enum(string[] names, object[] values, bool allowUnknownValues) { this.allowUnknownValues = allowUnknownValues; // these have to be null and the same length if (names == null || values == null || names.Length != values.Length) { throw new ArgumentException(SR.GetString(SR.COM2NamesAndValuesNotEqual)); } PopulateArrays(names, values); } ////// /// Can this enum be values other than the strict enum? /// public bool IsStrictEnum { get { return !this.allowUnknownValues; } } ////// /// Retrieve a copy of the value array /// public virtual object[] Values { get { return(object[])this.values.Clone(); } } ////// /// Retrieve a copy of the nme array. /// public virtual string[] Names { get { return(string[])this.names.Clone(); } } ////// /// Associate a string to the appropriate value. /// public virtual object FromString(string s) { int bestMatch = -1; for (int i = 0; i < stringValues.Length; i++) { if (String.Compare(names[i], s, true, CultureInfo.InvariantCulture) == 0 || String.Compare(stringValues[i], s, true, CultureInfo.InvariantCulture) == 0) { return values[i]; } if (bestMatch == -1 && 0 == String.Compare(names[i], s, true, CultureInfo.InvariantCulture)) { bestMatch = i; } } if (bestMatch != -1) { return values[bestMatch]; } return allowUnknownValues ? s : null; } protected virtual void PopulateArrays(string[] names, object[] values) { // setup our values...since we have to walk through // them anyway to do the ToString, we just copy them here. this.names = new string[names.Length]; this.stringValues = new string[names.Length]; this.values = new object[names.Length]; for (int i = 0; i < names.Length; i++) { //Debug.WriteLine(names[i] + ": item " + i.ToString() + ",type=" + values[i].GetType().Name + ", value=" + values[i].ToString()); this.names[i] = names[i]; this.values[i] = values[i]; if (values[i] != null) { this.stringValues[i] = values[i].ToString(); } } } ////// /// Retrieves the string name of a given value. /// public virtual string ToString(object v) { if (v != null) { // in case this is a real enum...try to convert it. // if (values.Length > 0 && v.GetType() != values[0].GetType()) { try { v = Convert.ChangeType(v, values[0].GetType(), CultureInfo.InvariantCulture); } catch{ } } // we have to do this do compensate for small discrpencies // in a lot of objects in COM2 (DWORD -> VT_IU4, value we get is VT_I4, which // convert to Int32, UInt32 respectively string strVal = v.ToString(); for (int i = 0; i < values.Length; i++) { if (String.Compare(stringValues[i], strVal, true, CultureInfo.InvariantCulture) == 0) { return names[i]; } } if (allowUnknownValues) { return strVal; } } return ""; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.ComponentModel.Com2Interop { using System.ComponentModel; using System.Diagnostics; using System; using System.Collections; using Microsoft.Win32; using System.Globalization; ////// /// This class mimics a clr enum that we can create at runtime. /// It associates an array of names with an array of values and converts /// between them. /// /// A note here: we compare string values when looking for the value of an item. /// Typically these aren't large lists and the perf is worth it. The reason stems /// from IPerPropertyBrowsing, which supplies a list of names and a list of /// variants to mimic enum functionality. If the actual property value is a DWORD, /// which translates to VT_UI4, and they specify their values as VT_I4 (which is a common /// mistake), they won't compare properly and values can't be updated. /// By comparing strings, we avoid this problem and add flexiblity to the system. /// internal class Com2Enum { ////// /// Our array of value string names /// private string[] names; ////// /// Our values /// private object[] values; ////// /// Our cached array of value.ToString()'s /// private string[] stringValues; ////// /// Should we allow values besides what's in the listbox? /// private bool allowUnknownValues; ////// /// Our one and only ctor /// public Com2Enum(string[] names, object[] values, bool allowUnknownValues) { this.allowUnknownValues = allowUnknownValues; // these have to be null and the same length if (names == null || values == null || names.Length != values.Length) { throw new ArgumentException(SR.GetString(SR.COM2NamesAndValuesNotEqual)); } PopulateArrays(names, values); } ////// /// Can this enum be values other than the strict enum? /// public bool IsStrictEnum { get { return !this.allowUnknownValues; } } ////// /// Retrieve a copy of the value array /// public virtual object[] Values { get { return(object[])this.values.Clone(); } } ////// /// Retrieve a copy of the nme array. /// public virtual string[] Names { get { return(string[])this.names.Clone(); } } ////// /// Associate a string to the appropriate value. /// public virtual object FromString(string s) { int bestMatch = -1; for (int i = 0; i < stringValues.Length; i++) { if (String.Compare(names[i], s, true, CultureInfo.InvariantCulture) == 0 || String.Compare(stringValues[i], s, true, CultureInfo.InvariantCulture) == 0) { return values[i]; } if (bestMatch == -1 && 0 == String.Compare(names[i], s, true, CultureInfo.InvariantCulture)) { bestMatch = i; } } if (bestMatch != -1) { return values[bestMatch]; } return allowUnknownValues ? s : null; } protected virtual void PopulateArrays(string[] names, object[] values) { // setup our values...since we have to walk through // them anyway to do the ToString, we just copy them here. this.names = new string[names.Length]; this.stringValues = new string[names.Length]; this.values = new object[names.Length]; for (int i = 0; i < names.Length; i++) { //Debug.WriteLine(names[i] + ": item " + i.ToString() + ",type=" + values[i].GetType().Name + ", value=" + values[i].ToString()); this.names[i] = names[i]; this.values[i] = values[i]; if (values[i] != null) { this.stringValues[i] = values[i].ToString(); } } } ////// /// Retrieves the string name of a given value. /// public virtual string ToString(object v) { if (v != null) { // in case this is a real enum...try to convert it. // if (values.Length > 0 && v.GetType() != values[0].GetType()) { try { v = Convert.ChangeType(v, values[0].GetType(), CultureInfo.InvariantCulture); } catch{ } } // we have to do this do compensate for small discrpencies // in a lot of objects in COM2 (DWORD -> VT_IU4, value we get is VT_I4, which // convert to Int32, UInt32 respectively string strVal = v.ToString(); for (int i = 0; i < values.Length; i++) { if (String.Compare(stringValues[i], strVal, true, CultureInfo.InvariantCulture) == 0) { return names[i]; } } if (allowUnknownValues) { return strVal; } } return ""; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- COAUTHIDENTITY.cs
- TimeSpanParse.cs
- BaseEntityWrapper.cs
- Unit.cs
- RIPEMD160.cs
- AsymmetricSignatureDeformatter.cs
- CommandDevice.cs
- SymDocumentType.cs
- AlternateViewCollection.cs
- ProgressBarHighlightConverter.cs
- EventBuilder.cs
- RoleManagerModule.cs
- FactoryRecord.cs
- HttpCacheVary.cs
- EventItfInfo.cs
- CustomLineCap.cs
- Transactions.cs
- WebPartCatalogCloseVerb.cs
- PagedControl.cs
- DataBoundLiteralControl.cs
- TextEditorSelection.cs
- Context.cs
- HiddenField.cs
- CompoundFileIOPermission.cs
- MouseButton.cs
- EventLogPermission.cs
- FormViewPageEventArgs.cs
- HttpWebRequestElement.cs
- ComponentRenameEvent.cs
- MethodBody.cs
- ScriptIgnoreAttribute.cs
- UpdateManifestForBrowserApplication.cs
- FixedSOMLineRanges.cs
- GridViewDeleteEventArgs.cs
- SQLInt32Storage.cs
- DictionaryTraceRecord.cs
- DictionaryTraceRecord.cs
- MenuEventArgs.cs
- BeginStoryboard.cs
- DeclarativeConditionsCollection.cs
- IncrementalCompileAnalyzer.cs
- SubclassTypeValidatorAttribute.cs
- TextEditorLists.cs
- TreeViewImageKeyConverter.cs
- Attachment.cs
- BookmarkScopeManager.cs
- StringPropertyBuilder.cs
- AQNBuilder.cs
- NavigateEvent.cs
- ValidatorCompatibilityHelper.cs
- EpmSourcePathSegment.cs
- EntitySetRetriever.cs
- SecuritySessionSecurityTokenProvider.cs
- TranslateTransform.cs
- ClientRoleProvider.cs
- XamlInterfaces.cs
- ListControlActionList.cs
- ListSourceHelper.cs
- LoginUtil.cs
- ResponseStream.cs
- SchemaImporterExtensionsSection.cs
- ACL.cs
- DirectionalLight.cs
- QueryCursorEventArgs.cs
- SqlDuplicator.cs
- MobileControlsSection.cs
- XmlRootAttribute.cs
- SqlInfoMessageEvent.cs
- RoutedEventHandlerInfo.cs
- WebPartConnection.cs
- TextTabProperties.cs
- List.cs
- RecognitionResult.cs
- RNGCryptoServiceProvider.cs
- SingleResultAttribute.cs
- DocumentViewer.cs
- WorkflowApplicationUnloadedException.cs
- NavigateEvent.cs
- ColorConvertedBitmap.cs
- UriSection.cs
- WindowsSolidBrush.cs
- SystemWebCachingSectionGroup.cs
- HandleCollector.cs
- ResXResourceSet.cs
- MobileComponentEditorPage.cs
- ConnectionPool.cs
- RadioButton.cs
- NestedContainer.cs
- ChangeDirector.cs
- Ports.cs
- TableLayoutSettingsTypeConverter.cs
- CompilerError.cs
- ParameterCollectionEditorForm.cs
- ProtocolReflector.cs
- CollectionViewSource.cs
- SQLDecimalStorage.cs
- ConditionalDesigner.cs
- DispatcherSynchronizationContext.cs
- XPathParser.cs
- UriTemplatePathSegment.cs