Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / 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. // //----------------------------------------------------------------------------- /* */ 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
- ContentElement.cs
- DataSourceProvider.cs
- OleDbStruct.cs
- PinProtectionHelper.cs
- CoTaskMemSafeHandle.cs
- MenuScrollingVisibilityConverter.cs
- ToolStripTemplateNode.cs
- NavigationCommands.cs
- NetNamedPipeSecurity.cs
- ToolStripItemImageRenderEventArgs.cs
- IndexExpression.cs
- cache.cs
- ProfileSettings.cs
- TabControlEvent.cs
- AppendHelper.cs
- DataFieldConverter.cs
- HttpCapabilitiesEvaluator.cs
- WebPartCatalogAddVerb.cs
- SqlBinder.cs
- WhiteSpaceTrimStringConverter.cs
- EntityDataSourceWrapperCollection.cs
- AuthorizationPolicyTypeElementCollection.cs
- _BasicClient.cs
- UnsafeNetInfoNativeMethods.cs
- WeakReference.cs
- DictationGrammar.cs
- RandomNumberGenerator.cs
- GeneratedView.cs
- FileRecordSequenceHelper.cs
- Vector3DCollection.cs
- DataControlCommands.cs
- OleDbPermission.cs
- indexingfiltermarshaler.cs
- RuleSettingsCollection.cs
- SQLDateTimeStorage.cs
- ReservationCollection.cs
- Size.cs
- BitmapFrame.cs
- FixedTextSelectionProcessor.cs
- StringUtil.cs
- ViewBox.cs
- RichTextBoxConstants.cs
- AbstractDataSvcMapFileLoader.cs
- SubclassTypeValidatorAttribute.cs
- FigureParagraph.cs
- TemplateManager.cs
- Group.cs
- PropertyMappingExceptionEventArgs.cs
- FileSystemWatcher.cs
- PreviewPrintController.cs
- ListViewInsertedEventArgs.cs
- _SslSessionsCache.cs
- AsyncCompletedEventArgs.cs
- HtmlUtf8RawTextWriter.cs
- FormCollection.cs
- JoinGraph.cs
- TextUtf8RawTextWriter.cs
- HashCodeCombiner.cs
- ToolStripPanelRow.cs
- IDispatchConstantAttribute.cs
- TextTreeNode.cs
- serverconfig.cs
- PropertyGrid.cs
- _ScatterGatherBuffers.cs
- SortQuery.cs
- HTMLTextWriter.cs
- PathSegment.cs
- QilTernary.cs
- SecurityContextTokenValidationException.cs
- Profiler.cs
- TraceContextEventArgs.cs
- IPGlobalProperties.cs
- SharedDp.cs
- ToolTip.cs
- FieldNameLookup.cs
- MonthCalendarDesigner.cs
- Relationship.cs
- DockPattern.cs
- ArraySegment.cs
- RootBuilder.cs
- ZipPackagePart.cs
- ResourceDictionaryCollection.cs
- TypeUtil.cs
- TypeSemantics.cs
- SafeHandle.cs
- RangeValidator.cs
- ApplyTemplatesAction.cs
- TcpClientSocketManager.cs
- TransportSecurityProtocolFactory.cs
- OutputScope.cs
- WebFaultClientMessageInspector.cs
- SecurityKeyIdentifierClause.cs
- FilterQueryOptionExpression.cs
- ThemeableAttribute.cs
- PageCache.cs
- XmlDataContract.cs
- PrintPreviewControl.cs
- AcceleratedTokenProviderState.cs
- CodeChecksumPragma.cs
- TextTreeTextElementNode.cs