Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / ListViewGroupConverter.cs / 1 / ListViewGroupConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Runtime.Serialization.Formatters; using System.Runtime.Remoting; using System.Runtime.InteropServices; using Microsoft.Win32; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Drawing; using System.Diagnostics; using System.Globalization; using System.Reflection; ////// /// ListViewGroupConverter is a class that can be used to convert /// ListViewGroup objects from one data type to another. Access this /// class through the TypeDescriptor. /// internal class ListViewGroupConverter : TypeConverter { ////// /// Determines if this converter can convert an object in the given source /// type to the native type of the converter. /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string) && context != null && context.Instance is ListViewItem) { return true; } return base.CanConvertFrom(context, sourceType); } ////// /// public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (destinationType == typeof(InstanceDescriptor)) { return true; } if (destinationType == typeof(string) && context != null && context.Instance is ListViewItem) { return true; } return base.CanConvertTo(context, destinationType); } ///Gets a value indicating whether this converter can /// convert an object to the given destination type using the context. ////// /// Converts the given object to the converter's native type. /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) { string text = ((string)value).Trim(); if (context != null && context.Instance != null) { ListViewItem item = context.Instance as ListViewItem; if (item != null && item.ListView != null) { foreach(ListViewGroup group in item.ListView.Groups) { if (group.Header == text) { return group; } } } } } if (value == null || value.Equals(SR.GetString(SR.toStringNone))) { return null; } return base.ConvertFrom(context, culture, value); } ////// /// 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(InstanceDescriptor) && value is ListViewGroup) { ListViewGroup group = (ListViewGroup)value; ConstructorInfo ctor; // Header // ctor = typeof(ListViewGroup).GetConstructor(new Type[] {typeof(string), typeof(HorizontalAlignment)}); if (ctor != null) { return new InstanceDescriptor(ctor, new object[] { group.Header, group.HeaderAlignment }, false); } } if (destinationType == typeof(string) && value == null) { 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) { ListViewItem item = context.Instance as ListViewItem; if (item != null && item.ListView != null) { ArrayList list = new ArrayList(); foreach (ListViewGroup group in item.ListView.Groups) { list.Add(group); } list.Add(null); return new StandardValuesCollection(list); } } return null; } ////// /// Determines if the list of standard values returned from /// GetStandardValues is an exclusive list. If the list /// is exclusive, then no other values are valid, such as /// in an enum data type. If the list is not exclusive, /// then there are other valid values besides the list of /// standard values GetStandardValues provides. /// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return true; } ////// /// Determines if this object supports a standard set of values /// that can be picked from a list. /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- _WinHttpWebProxyDataBuilder.cs
- AnnotationHelper.cs
- DataGridTable.cs
- HttpStaticObjectsCollectionBase.cs
- ThicknessAnimationBase.cs
- TemplateBindingExpression.cs
- SafeProcessHandle.cs
- ParagraphVisual.cs
- WindowsListViewItemCheckBox.cs
- ManagementDateTime.cs
- FixedSOMTableCell.cs
- ProxyElement.cs
- DependencyPropertyValueSerializer.cs
- ConfigurationElementProperty.cs
- XmlSerializationWriter.cs
- WCFBuildProvider.cs
- BindingEditor.xaml.cs
- HtmlInputReset.cs
- ProgressBarRenderer.cs
- MemberMaps.cs
- ContentIterators.cs
- StrokeFIndices.cs
- WebPartCollection.cs
- ZoneMembershipCondition.cs
- DataGridViewRowPrePaintEventArgs.cs
- FirewallWrapper.cs
- HtmlControl.cs
- XsltFunctions.cs
- ComponentConverter.cs
- MetafileHeader.cs
- ISAPIApplicationHost.cs
- XmlSchemaAny.cs
- NamespaceMapping.cs
- EnumConverter.cs
- NavigateEvent.cs
- DeleteHelper.cs
- SemaphoreSecurity.cs
- NetworkAddressChange.cs
- CodeMemberMethod.cs
- EasingQuaternionKeyFrame.cs
- DbQueryCommandTree.cs
- FrameworkContentElementAutomationPeer.cs
- StateRuntime.cs
- RoutedPropertyChangedEventArgs.cs
- TraceLevelStore.cs
- WasEndpointConfigContainer.cs
- TextBox.cs
- OutputCacheModule.cs
- IPEndPoint.cs
- ListViewTableRow.cs
- AsyncContentLoadedEventArgs.cs
- XPathSelectionIterator.cs
- OrderingExpression.cs
- Int32.cs
- CollectionDataContract.cs
- Int32RectValueSerializer.cs
- StreamInfo.cs
- DrawingContextDrawingContextWalker.cs
- Brush.cs
- GridProviderWrapper.cs
- OdbcEnvironmentHandle.cs
- DecoderReplacementFallback.cs
- Validator.cs
- SqlDuplicator.cs
- DirectoryNotFoundException.cs
- LayoutDump.cs
- PreviewPrintController.cs
- ReadOnlyNameValueCollection.cs
- Int32Animation.cs
- SqlColumnizer.cs
- VectorKeyFrameCollection.cs
- SpeechEvent.cs
- unsafeIndexingFilterStream.cs
- DataRelationCollection.cs
- X509AsymmetricSecurityKey.cs
- XpsException.cs
- XmlSerializerFactory.cs
- ZipIOCentralDirectoryBlock.cs
- RawAppCommandInputReport.cs
- HierarchicalDataSourceControl.cs
- FixedHighlight.cs
- AspNetHostingPermission.cs
- XmlImplementation.cs
- AutomationProperty.cs
- PeerServiceMessageContracts.cs
- SoapEnumAttribute.cs
- TypedCompletedAsyncResult.cs
- ServiceRouteHandler.cs
- RC2CryptoServiceProvider.cs
- TypeDescriptor.cs
- QueryableFilterRepeater.cs
- SpecialFolderEnumConverter.cs
- ClipboardData.cs
- DropShadowBitmapEffect.cs
- StandardToolWindows.cs
- ResourceManager.cs
- EventItfInfo.cs
- GroupByQueryOperator.cs
- ModulesEntry.cs
- ManipulationVelocities.cs