Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / TreeNodeConverter.cs / 1 / TreeNodeConverter.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; ////// /// TreeNodeConverter is a class that can be used to convert /// TreeNode objects from one data type to another. Access this /// class through the TypeDescriptor. /// public class TreeNodeConverter : TypeConverter { ////// /// public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (destinationType == typeof(InstanceDescriptor)) { 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 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 TreeNode) { TreeNode node = (TreeNode)value; MemberInfo info = null; object[] args = null; if (node.ImageIndex == -1 || node.SelectedImageIndex == -1) { if (node.Nodes.Count == 0) { info = typeof(TreeNode).GetConstructor(new Type[] {typeof(string)}); args = new object[] {node.Text}; } else { info = typeof(TreeNode).GetConstructor(new Type[] {typeof(string), typeof(TreeNode[])}); TreeNode[] nodesArray = new TreeNode[node.Nodes.Count]; node.Nodes.CopyTo(nodesArray, 0); args = new object[] {node.Text, nodesArray}; } } else { if (node.Nodes.Count == 0) { info = typeof(TreeNode).GetConstructor(new Type[] { typeof(string), typeof(int), typeof(int)}); args = new object[] { node.Text, node.ImageIndex, node.SelectedImageIndex}; } else { info = typeof(TreeNode).GetConstructor(new Type[] { typeof(string), typeof(int), typeof(int), typeof(TreeNode[])}); TreeNode[] nodesArray = new TreeNode[node.Nodes.Count]; node.Nodes.CopyTo(nodesArray, 0); args = new object[] { node.Text, node.ImageIndex, node.SelectedImageIndex, nodesArray}; } } if (info != null) { return new InstanceDescriptor(info, args, false); } } return base.ConvertTo(context, culture, value, destinationType); } } } // 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
- FixedDSBuilder.cs
- ClrPerspective.cs
- SelectorItemAutomationPeer.cs
- TableItemProviderWrapper.cs
- UpdatePanelTrigger.cs
- HtmlForm.cs
- Transactions.cs
- SchemaImporter.cs
- StructuredTypeEmitter.cs
- ToolStripSystemRenderer.cs
- RequestCacheEntry.cs
- ArrayExtension.cs
- XmlSchemaSimpleContent.cs
- CodeTypeReferenceExpression.cs
- SqlConnectionStringBuilder.cs
- SurrogateChar.cs
- RIPEMD160Managed.cs
- DynamicExpression.cs
- DataGridViewDataConnection.cs
- RemoteDebugger.cs
- EditorZone.cs
- SmtpNegotiateAuthenticationModule.cs
- CompilerInfo.cs
- DiscoveryDefaults.cs
- SrgsToken.cs
- SyndicationFeed.cs
- CodeNamespaceImport.cs
- GridViewDeleteEventArgs.cs
- RepeatButtonAutomationPeer.cs
- XslCompiledTransform.cs
- Viewport3DVisual.cs
- MsmqVerifier.cs
- XmlMembersMapping.cs
- EventDescriptor.cs
- WeakReadOnlyCollection.cs
- PagesChangedEventArgs.cs
- SecurityUtils.cs
- DataGridViewColumnStateChangedEventArgs.cs
- SqlMethodTransformer.cs
- GPRECTF.cs
- IPPacketInformation.cs
- ChtmlMobileTextWriter.cs
- GZipDecoder.cs
- GeneralTransform3DCollection.cs
- Cursors.cs
- DataShape.cs
- VirtualizingStackPanel.cs
- ObjectReaderCompiler.cs
- Ray3DHitTestResult.cs
- ObjectStateEntry.cs
- StringFormat.cs
- VisualTreeUtils.cs
- DataRecord.cs
- PrinterSettings.cs
- SharedStatics.cs
- BitmapVisualManager.cs
- TextSpan.cs
- GridViewRow.cs
- BaseComponentEditor.cs
- VSWCFServiceContractGenerator.cs
- LinkLabelLinkClickedEvent.cs
- WindowPatternIdentifiers.cs
- DefaultProxySection.cs
- SafeNativeMethods.cs
- CompilerWrapper.cs
- CodeMemberField.cs
- Graphics.cs
- ComponentCommands.cs
- COM2ExtendedTypeConverter.cs
- EntryPointNotFoundException.cs
- TransportSecurityBindingElement.cs
- ObjectParameter.cs
- ArrayElementGridEntry.cs
- WasNotInstalledException.cs
- AsyncOperation.cs
- SiteMapDataSourceView.cs
- MenuItemStyle.cs
- FixedSOMLineCollection.cs
- UIServiceHelper.cs
- TemplateInstanceAttribute.cs
- LoginName.cs
- ChangesetResponse.cs
- DataServiceStreamResponse.cs
- AttachedPropertiesService.cs
- Point4DConverter.cs
- SqlParameterizer.cs
- WinEventHandler.cs
- LinqDataView.cs
- DesignerCategoryAttribute.cs
- OperatingSystemVersionCheck.cs
- BitmapCacheBrush.cs
- WebPartAddingEventArgs.cs
- TileBrush.cs
- ButtonBase.cs
- MasterPageParser.cs
- TableCellsCollectionEditor.cs
- PrintingPermissionAttribute.cs
- StreamWriter.cs
- DataRowCollection.cs
- XDeferredAxisSource.cs