Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / TreeViewImageIndexConverter.cs / 1305376 / TreeViewImageIndexConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Collections.Specialized; ////// /// TreeViewImageIndexConverter is a class that can be used to convert /// image index values one data type to another. /// public class TreeViewImageIndexConverter : ImageIndexConverter { ///protected override bool IncludeNoneAsStandardValue { get { return false; } } /// /// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { string strValue = value as string; if (strValue != null) { if (String.Compare(strValue, SR.GetString(SR.toStringDefault), true, culture) == 0) { return -1; } else if (String.Compare(strValue, SR.GetString(SR.toStringNone), true, culture) == 0) { return -2; } } return base.ConvertFrom(context, culture, value); } ////// Converts the given value object to a 32-bit signed integer object. /// ////// /// 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(string) && value is int) { int intValue = (int)value; if (intValue == -1) { return SR.GetString(SR.toStringDefault); } else if (intValue == -2) { 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) { object instance = context.Instance; PropertyDescriptor imageListProp = ImageListUtils.GetImageListProperty(context.PropertyDescriptor, ref instance); while (instance != null && imageListProp == null) { PropertyDescriptorCollection props = TypeDescriptor.GetProperties(instance); foreach (PropertyDescriptor prop in props) { if (typeof(ImageList).IsAssignableFrom(prop.PropertyType)) { imageListProp = prop; break; } } if (imageListProp == null) { // We didn't find the image list in this component. See if the // component has a "parent" property. If so, walk the tree... // PropertyDescriptor parentProp = props[ParentImageListProperty]; if (parentProp != null) { instance = parentProp.GetValue(instance); } else { // Stick a fork in us, we're done. // instance = null; } } } if (imageListProp != null) { ImageList imageList = (ImageList)imageListProp.GetValue(instance); if (imageList != null) { // Create array to contain standard values // object[] values; int nImages = imageList.Images.Count+2; values = new object[nImages]; values[nImages-2] = -1; values[nImages-1] = -2; // Fill in the array // for (int i = 0; i < nImages-2; i++) { values[i] = i; } return new StandardValuesCollection(values); } } } return new StandardValuesCollection(new object[] { -1, -2 }); } } } // Namespace system.windows.forms // 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
- RadialGradientBrush.cs
- StyleConverter.cs
- ClientScriptItemCollection.cs
- MouseBinding.cs
- SemanticResolver.cs
- ProjectionCamera.cs
- DoubleAnimationBase.cs
- DataGridTable.cs
- PropertyChangeTracker.cs
- MonitoringDescriptionAttribute.cs
- MetricEntry.cs
- PaginationProgressEventArgs.cs
- BamlMapTable.cs
- MenuItemAutomationPeer.cs
- EditorPart.cs
- AssemblyAttributes.cs
- ColumnCollection.cs
- ChangePasswordDesigner.cs
- SQLMoney.cs
- SqlMetaData.cs
- ConfigurationValues.cs
- SafeCloseHandleCritical.cs
- TextFormattingConverter.cs
- ServiceNameCollection.cs
- ExternalCalls.cs
- RemoteCryptoDecryptRequest.cs
- GenericParameterDataContract.cs
- EntityDataSource.cs
- XmlEncApr2001.cs
- SqlReorderer.cs
- LogReserveAndAppendState.cs
- ConnectionInterfaceCollection.cs
- SizeConverter.cs
- InboundActivityHelper.cs
- KeyValuePairs.cs
- MenuItemBindingCollection.cs
- RadioButtonBaseAdapter.cs
- WebSysDefaultValueAttribute.cs
- SizeFConverter.cs
- EndPoint.cs
- ReliabilityContractAttribute.cs
- TraceListeners.cs
- Point4D.cs
- UrlPath.cs
- FormConverter.cs
- AutoGeneratedField.cs
- InkCanvasSelection.cs
- Brush.cs
- Stackframe.cs
- Item.cs
- ContextMenu.cs
- FieldAccessException.cs
- TypefaceMetricsCache.cs
- ResourceSet.cs
- UserControlCodeDomTreeGenerator.cs
- SafeLocalMemHandle.cs
- CompilerParameters.cs
- ContractSearchPattern.cs
- AssemblyHash.cs
- PrtCap_Builder.cs
- ThicknessConverter.cs
- Accessors.cs
- CodeIterationStatement.cs
- BufferedStream.cs
- StringBlob.cs
- Domain.cs
- OutputScopeManager.cs
- DynamicUpdateCommand.cs
- InvalidPrinterException.cs
- SerialPort.cs
- _Rfc2616CacheValidators.cs
- XmlAtomicValue.cs
- IPAddress.cs
- ConnectionsZone.cs
- LifetimeServices.cs
- SBCSCodePageEncoding.cs
- controlskin.cs
- QuotedPrintableStream.cs
- DataGridTemplateColumn.cs
- ObjectContextServiceProvider.cs
- TemplateField.cs
- CopyOfAction.cs
- InvalidDataContractException.cs
- XamlSerializer.cs
- ExpandCollapsePattern.cs
- XmlEncodedRawTextWriter.cs
- CmsInterop.cs
- GridEntryCollection.cs
- Binding.cs
- WriterOutput.cs
- SQLSingleStorage.cs
- MethodSet.cs
- WebPartMovingEventArgs.cs
- FrameDimension.cs
- CaseStatement.cs
- EntityViewGenerationConstants.cs
- XmlSchemaObjectCollection.cs
- ConstraintStruct.cs
- CircleEase.cs
- HtmlButton.cs