Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / TreeViewImageIndexConverter.cs / 1305376 / TreeViewImageIndexConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Collections.Specialized; ////// /// TreeViewImageIndexConverter is a class that can be used to convert /// image index values one data type to another. /// public class TreeViewImageIndexConverter : ImageIndexConverter { ///protected override bool IncludeNoneAsStandardValue { get { return false; } } /// /// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { string strValue = value as string; if (strValue != null) { if (String.Compare(strValue, SR.GetString(SR.toStringDefault), true, culture) == 0) { return -1; } else if (String.Compare(strValue, SR.GetString(SR.toStringNone), true, culture) == 0) { return -2; } } return base.ConvertFrom(context, culture, value); } ////// Converts the given value object to a 32-bit signed integer object. /// ////// /// Converts the given object to another type. The most common types to convert /// are to and from a string object. The default implementation will make a call /// to ToString on the object if the object is valid and if the destination /// type is string. If this cannot convert to the desitnation type, this will /// throw a NotSupportedException. /// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == null) { throw new ArgumentNullException("destinationType"); } if (destinationType == typeof(string) && value is int) { int intValue = (int)value; if (intValue == -1) { return SR.GetString(SR.toStringDefault); } else if (intValue == -2) { return SR.GetString(SR.toStringNone); } } return base.ConvertTo(context, culture, value, destinationType); } ////// /// Retrieves a collection containing a set of standard values /// for the data type this validator is designed for. This /// will return null if the data type does not support a /// standard set of values. /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (context != null && context.Instance != null) { object instance = context.Instance; PropertyDescriptor imageListProp = ImageListUtils.GetImageListProperty(context.PropertyDescriptor, ref instance); while (instance != null && imageListProp == null) { PropertyDescriptorCollection props = TypeDescriptor.GetProperties(instance); foreach (PropertyDescriptor prop in props) { if (typeof(ImageList).IsAssignableFrom(prop.PropertyType)) { imageListProp = prop; break; } } if (imageListProp == null) { // We didn't find the image list in this component. See if the // component has a "parent" property. If so, walk the tree... // PropertyDescriptor parentProp = props[ParentImageListProperty]; if (parentProp != null) { instance = parentProp.GetValue(instance); } else { // Stick a fork in us, we're done. // instance = null; } } } if (imageListProp != null) { ImageList imageList = (ImageList)imageListProp.GetValue(instance); if (imageList != null) { // Create array to contain standard values // object[] values; int nImages = imageList.Images.Count+2; values = new object[nImages]; values[nImages-2] = -1; values[nImages-1] = -2; // Fill in the array // for (int i = 0; i < nImages-2; i++) { values[i] = i; } return new StandardValuesCollection(values); } } } return new StandardValuesCollection(new object[] { -1, -2 }); } } } // Namespace system.windows.forms // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Collections.Specialized; ////// /// TreeViewImageIndexConverter is a class that can be used to convert /// image index values one data type to another. /// public class TreeViewImageIndexConverter : ImageIndexConverter { ///protected override bool IncludeNoneAsStandardValue { get { return false; } } /// /// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { string strValue = value as string; if (strValue != null) { if (String.Compare(strValue, SR.GetString(SR.toStringDefault), true, culture) == 0) { return -1; } else if (String.Compare(strValue, SR.GetString(SR.toStringNone), true, culture) == 0) { return -2; } } return base.ConvertFrom(context, culture, value); } ////// Converts the given value object to a 32-bit signed integer object. /// ////// /// Converts the given object to another type. The most common types to convert /// are to and from a string object. The default implementation will make a call /// to ToString on the object if the object is valid and if the destination /// type is string. If this cannot convert to the desitnation type, this will /// throw a NotSupportedException. /// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType == null) { throw new ArgumentNullException("destinationType"); } if (destinationType == typeof(string) && value is int) { int intValue = (int)value; if (intValue == -1) { return SR.GetString(SR.toStringDefault); } else if (intValue == -2) { return SR.GetString(SR.toStringNone); } } return base.ConvertTo(context, culture, value, destinationType); } ////// /// Retrieves a collection containing a set of standard values /// for the data type this validator is designed for. This /// will return null if the data type does not support a /// standard set of values. /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (context != null && context.Instance != null) { object instance = context.Instance; PropertyDescriptor imageListProp = ImageListUtils.GetImageListProperty(context.PropertyDescriptor, ref instance); while (instance != null && imageListProp == null) { PropertyDescriptorCollection props = TypeDescriptor.GetProperties(instance); foreach (PropertyDescriptor prop in props) { if (typeof(ImageList).IsAssignableFrom(prop.PropertyType)) { imageListProp = prop; break; } } if (imageListProp == null) { // We didn't find the image list in this component. See if the // component has a "parent" property. If so, walk the tree... // PropertyDescriptor parentProp = props[ParentImageListProperty]; if (parentProp != null) { instance = parentProp.GetValue(instance); } else { // Stick a fork in us, we're done. // instance = null; } } } if (imageListProp != null) { ImageList imageList = (ImageList)imageListProp.GetValue(instance); if (imageList != null) { // Create array to contain standard values // object[] values; int nImages = imageList.Images.Count+2; values = new object[nImages]; values[nImages-2] = -1; values[nImages-1] = -2; // Fill in the array // for (int i = 0; i < nImages-2; i++) { values[i] = i; } return new StandardValuesCollection(values); } } } return new StandardValuesCollection(new object[] { -1, -2 }); } } } // Namespace system.windows.forms // 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
- XPathParser.cs
- ItemsPanelTemplate.cs
- XPathNavigatorException.cs
- XmlDictionary.cs
- StrokeDescriptor.cs
- DataListItemCollection.cs
- DataObjectCopyingEventArgs.cs
- ServiceDescriptionImporter.cs
- ContainerFilterService.cs
- DBConnection.cs
- WorkflowValidationFailedException.cs
- ClickablePoint.cs
- RegistrationServices.cs
- AppSettingsExpressionEditor.cs
- StoreAnnotationsMap.cs
- RSAPKCS1KeyExchangeFormatter.cs
- ExpressionVisitorHelpers.cs
- LinqDataSourceStatusEventArgs.cs
- AutomationPatternInfo.cs
- EpmSourceTree.cs
- FileLoadException.cs
- SelfIssuedAuthRSAPKCS1SignatureFormatter.cs
- EventItfInfo.cs
- OutputCacheSettingsSection.cs
- ToolBarTray.cs
- TypefaceMap.cs
- QueueException.cs
- RemoteHelper.cs
- SplineKeyFrames.cs
- ItemsControl.cs
- HttpListener.cs
- EtwTrackingBehaviorElement.cs
- HttpPostedFileWrapper.cs
- CustomPopupPlacement.cs
- RuntimeEnvironment.cs
- XmlSchemaSimpleTypeList.cs
- RepeaterItemCollection.cs
- ConstrainedDataObject.cs
- webbrowsersite.cs
- WindowCollection.cs
- Localizer.cs
- XamlInt32CollectionSerializer.cs
- SqlCommandSet.cs
- ColorConverter.cs
- QueryResponse.cs
- ParsedAttributeCollection.cs
- RecognizedPhrase.cs
- ConfigXmlReader.cs
- QilIterator.cs
- ObjectListItemCollection.cs
- DrawListViewColumnHeaderEventArgs.cs
- WindowsTreeView.cs
- HotSpotCollection.cs
- TransactionContextValidator.cs
- XmlCharCheckingReader.cs
- SelectedGridItemChangedEvent.cs
- WebPartExportVerb.cs
- ThrowHelper.cs
- AlignmentYValidation.cs
- PaperSize.cs
- BasicExpandProvider.cs
- XappLauncher.cs
- ProcessHostServerConfig.cs
- CultureInfoConverter.cs
- StateBag.cs
- StandardRuntimeEnumValidator.cs
- RefExpr.cs
- MustUnderstandBehavior.cs
- FontStretch.cs
- JapaneseLunisolarCalendar.cs
- BaseTransportHeaders.cs
- HttpHandlersSection.cs
- FileNotFoundException.cs
- OdbcCommandBuilder.cs
- CqlParser.cs
- OrCondition.cs
- ItemCheckedEvent.cs
- DbConnectionStringCommon.cs
- ParameterBuilder.cs
- InternalControlCollection.cs
- ConnectionProviderAttribute.cs
- BaseAsyncResult.cs
- WebBrowser.cs
- SqlBulkCopy.cs
- typedescriptorpermission.cs
- ToolStripDropDownItem.cs
- NetworkInformationException.cs
- AssociationSet.cs
- CompilerGlobalScopeAttribute.cs
- ExpressionPrefixAttribute.cs
- CalendarDay.cs
- SoapHeader.cs
- mansign.cs
- Boolean.cs
- PageCache.cs
- CompModSwitches.cs
- TrustSection.cs
- SecondaryIndexDefinition.cs
- TextDecorationCollection.cs
- TemplatePropertyEntry.cs