Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ListViewGroupConverter.cs / 1305376 / 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CustomError.cs
- DbException.cs
- TablePattern.cs
- XhtmlTextWriter.cs
- TransformPattern.cs
- CultureTable.cs
- FixedStringLookup.cs
- DecimalSumAggregationOperator.cs
- SspiNegotiationTokenProvider.cs
- CallbackValidatorAttribute.cs
- BookmarkOptionsHelper.cs
- PageVisual.cs
- JavaScriptString.cs
- MenuItem.cs
- KeyboardEventArgs.cs
- SerializationEventsCache.cs
- BitmapEffectvisualstate.cs
- Int16Storage.cs
- ScrollProviderWrapper.cs
- RestHandlerFactory.cs
- UnsafeMethods.cs
- XamlTreeBuilderBamlRecordWriter.cs
- GridProviderWrapper.cs
- PerformanceCounterManager.cs
- TableItemStyle.cs
- Profiler.cs
- ExpressionBindingCollection.cs
- ToolStripDesignerAvailabilityAttribute.cs
- GridSplitterAutomationPeer.cs
- TrackingServices.cs
- AutomationElement.cs
- EntityContainerEmitter.cs
- OleDbRowUpdatingEvent.cs
- DynamicDataManager.cs
- DelegateCompletionCallbackWrapper.cs
- StyleConverter.cs
- LineVisual.cs
- SystemInfo.cs
- OleDbFactory.cs
- HttpListenerTimeoutManager.cs
- ExponentialEase.cs
- ToolBarButton.cs
- DBSchemaTable.cs
- DesignerActionHeaderItem.cs
- X509Certificate2Collection.cs
- NotificationContext.cs
- XmlQualifiedName.cs
- IdentitySection.cs
- LocalIdKeyIdentifierClause.cs
- FixedSOMImage.cs
- FaultImportOptions.cs
- RayHitTestParameters.cs
- ActivityBuilder.cs
- RuleSettings.cs
- OutputCacheProfileCollection.cs
- StrongNameIdentityPermission.cs
- EventItfInfo.cs
- TextModifierScope.cs
- EnvelopedSignatureTransform.cs
- Events.cs
- NotImplementedException.cs
- ValidationPropertyAttribute.cs
- ConfigurationPermission.cs
- OdbcConnectionStringbuilder.cs
- PrincipalPermissionMode.cs
- SiteIdentityPermission.cs
- EventDrivenDesigner.cs
- DecoderBestFitFallback.cs
- ProjectionAnalyzer.cs
- DSASignatureDeformatter.cs
- SAPIEngineTypes.cs
- XmlSchemaAttributeGroupRef.cs
- PersonalizationProviderHelper.cs
- IDictionary.cs
- DatagridviewDisplayedBandsData.cs
- CalendarTable.cs
- MiniLockedBorderGlyph.cs
- UpdatePanelTriggerCollection.cs
- HttpListenerContext.cs
- UIAgentAsyncEndRequest.cs
- SplitterEvent.cs
- AmbientProperties.cs
- SqlUDTStorage.cs
- SqlSelectStatement.cs
- XsltCompileContext.cs
- RightsManagementUser.cs
- FlowLayoutSettings.cs
- DataServiceExpressionVisitor.cs
- TableCell.cs
- _OverlappedAsyncResult.cs
- SessionPageStatePersister.cs
- GroupDescription.cs
- ConnectionConsumerAttribute.cs
- BlurEffect.cs
- WebPartAuthorizationEventArgs.cs
- RawStylusInputReport.cs
- TrackPoint.cs
- XmlDownloadManager.cs
- StreamReader.cs
- XPathDocumentNavigator.cs