Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / WinForms / Managed / System / WinForms / TreeViewImageIndexConverter.cs / 1 / 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
- Subtree.cs
- TraceLog.cs
- FragmentNavigationEventArgs.cs
- GPPOINTF.cs
- Trace.cs
- QueryPageSettingsEventArgs.cs
- PrintingPermission.cs
- QueryableDataSourceEditData.cs
- FlatButtonAppearance.cs
- ReferencedCategoriesDocument.cs
- ToolTipService.cs
- Monitor.cs
- NamespaceCollection.cs
- FontWeights.cs
- ExpandSegmentCollection.cs
- SQLBinary.cs
- DataGridViewImageCell.cs
- GB18030Encoding.cs
- CannotUnloadAppDomainException.cs
- UserPreferenceChangedEventArgs.cs
- VisualStateManager.cs
- CompositeControl.cs
- SHA256Managed.cs
- Button.cs
- CollectionViewSource.cs
- UInt16Converter.cs
- FamilyMap.cs
- WebPartActionVerb.cs
- NamespaceList.cs
- BaseDataListActionList.cs
- DataMember.cs
- CheckPair.cs
- TwoPhaseCommitProxy.cs
- MailAddress.cs
- ScrollBar.cs
- StoragePropertyMapping.cs
- InstanceBehavior.cs
- ResourceDescriptionAttribute.cs
- FormClosingEvent.cs
- FullTextLine.cs
- EnumValidator.cs
- DesignerOptions.cs
- ContextMarshalException.cs
- EventEntry.cs
- SortKey.cs
- COM2ComponentEditor.cs
- DataSysAttribute.cs
- ArrayListCollectionBase.cs
- TextPointer.cs
- XmlResolver.cs
- ConstructorNeedsTagAttribute.cs
- DelayLoadType.cs
- DataGridViewRowsRemovedEventArgs.cs
- ReferenceEqualityComparer.cs
- TriState.cs
- JournalEntry.cs
- XmlLoader.cs
- TileBrush.cs
- AssociationSetMetadata.cs
- Baml2006KeyRecord.cs
- Int32Rect.cs
- CodeTypeReferenceExpression.cs
- WebConfigurationManager.cs
- Rect.cs
- PersistChildrenAttribute.cs
- MouseActionValueSerializer.cs
- XmlCountingReader.cs
- GridViewRowEventArgs.cs
- TextTreeTextNode.cs
- UIAgentAsyncParams.cs
- Byte.cs
- sqlcontext.cs
- TypeInfo.cs
- EntityDataSourceColumn.cs
- XmlSchemaComplexContent.cs
- SQLString.cs
- DataRowExtensions.cs
- SafeCryptContextHandle.cs
- PeerCollaboration.cs
- WindowsImpersonationContext.cs
- HyperLinkColumn.cs
- NonVisualControlAttribute.cs
- ToolboxItemFilterAttribute.cs
- ConversionContext.cs
- SocketException.cs
- SiteMap.cs
- AutomationPatternInfo.cs
- SmiEventSink.cs
- RankException.cs
- PrimaryKeyTypeConverter.cs
- Button.cs
- ProgressBar.cs
- InternalBufferOverflowException.cs
- GregorianCalendarHelper.cs
- TextRangeAdaptor.cs
- HttpPostedFile.cs
- NetworkCredential.cs
- OracleParameterCollection.cs
- WebPartRestoreVerb.cs
- TimeSpanStorage.cs