Code:
/ 4.0 / 4.0 / 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. //------------------------------------------------------------------------------ //// 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
- Char.cs
- StringComparer.cs
- UnaryNode.cs
- DefaultMergeHelper.cs
- EntityContainer.cs
- TypeInformation.cs
- WebControlToolBoxItem.cs
- PageThemeBuildProvider.cs
- WindowsListBox.cs
- SolidBrush.cs
- PTManager.cs
- SQLBoolean.cs
- RemoteWebConfigurationHost.cs
- TextSegment.cs
- WbemException.cs
- DataTableClearEvent.cs
- SafeLocalMemHandle.cs
- RetrieveVirtualItemEventArgs.cs
- OutOfProcStateClientManager.cs
- CustomAttribute.cs
- TdsParserSafeHandles.cs
- DefaultSection.cs
- FileDialog.cs
- JsonSerializer.cs
- HwndSourceKeyboardInputSite.cs
- AuditLevel.cs
- PointUtil.cs
- FormViewUpdatedEventArgs.cs
- IPGlobalProperties.cs
- MemberAssignment.cs
- XpsColorContext.cs
- TemplateBamlTreeBuilder.cs
- LoadedOrUnloadedOperation.cs
- StrongNameUtility.cs
- TypeExtension.cs
- LogSwitch.cs
- SqlProfileProvider.cs
- SubclassTypeValidator.cs
- GeometryCollection.cs
- SqlInternalConnection.cs
- Button.cs
- AnonymousIdentificationSection.cs
- ConfigurationElement.cs
- counter.cs
- FileUtil.cs
- KeysConverter.cs
- SafeSecurityHelper.cs
- SqlFunctionAttribute.cs
- SqlDataReader.cs
- Reference.cs
- Binding.cs
- Subordinate.cs
- ScriptResourceAttribute.cs
- ImageDrawing.cs
- ImmutableClientRuntime.cs
- Tablet.cs
- MetadataArtifactLoader.cs
- MarkupProperty.cs
- SocketException.cs
- PageBorderless.cs
- TextTabProperties.cs
- connectionpool.cs
- ConfigPathUtility.cs
- BaseUriHelper.cs
- NonVisualControlAttribute.cs
- PageHandlerFactory.cs
- CompositionAdorner.cs
- IDReferencePropertyAttribute.cs
- DataGridViewLinkCell.cs
- DataColumnCollection.cs
- SharedUtils.cs
- ISAPIRuntime.cs
- DispatcherOperation.cs
- DbConnectionPoolOptions.cs
- ValidationHelper.cs
- ListViewItemMouseHoverEvent.cs
- NumericUpDown.cs
- WebPartDisplayModeCollection.cs
- SurrogateEncoder.cs
- FileRecordSequence.cs
- ConfigUtil.cs
- MonitoringDescriptionAttribute.cs
- AttachedPropertyInfo.cs
- MexTcpBindingCollectionElement.cs
- DataQuery.cs
- SafeRightsManagementSessionHandle.cs
- SafeBitVector32.cs
- WebPartAuthorizationEventArgs.cs
- ModuleElement.cs
- OutputChannelBinder.cs
- DataSetMappper.cs
- CapabilitiesUse.cs
- MouseButton.cs
- SqlStatistics.cs
- ServiceNameElement.cs
- Region.cs
- SqlCommandSet.cs
- DmlSqlGenerator.cs
- TextTreeText.cs
- UrlPath.cs