Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / WinForms / Managed / System / WinForms / TreeViewImageIndexConverter.cs / 1 / 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. //------------------------------------------------------------------------------ //// 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
- MemberPath.cs
- mediaeventshelper.cs
- DefaultProxySection.cs
- XamlInt32CollectionSerializer.cs
- StringReader.cs
- OdbcConnectionOpen.cs
- CompilerGlobalScopeAttribute.cs
- CRYPTPROTECT_PROMPTSTRUCT.cs
- ReaderContextStackData.cs
- ConfigXmlElement.cs
- ReadOnlyCollectionBuilder.cs
- XmlText.cs
- CriticalHandle.cs
- CodeTypeMemberCollection.cs
- WhitespaceSignificantCollectionAttribute.cs
- EventLogger.cs
- TypeAccessException.cs
- TransformGroup.cs
- EventLevel.cs
- StringFormat.cs
- StyleTypedPropertyAttribute.cs
- StringDictionary.cs
- XmlSchemaImport.cs
- QueryConverter.cs
- StyleModeStack.cs
- SecurityPolicySection.cs
- ServiceOperationDetailViewControl.cs
- CookieParameter.cs
- FormViewDeletedEventArgs.cs
- WebPartDisplayMode.cs
- PolyLineSegment.cs
- OdbcConnectionHandle.cs
- ComAwareEventInfo.cs
- ExpressionTextBoxAutomationPeer.cs
- MissingMethodException.cs
- Line.cs
- ExpandableObjectConverter.cs
- HighlightComponent.cs
- GlyphCollection.cs
- JoinGraph.cs
- DocobjHost.cs
- DigitShape.cs
- AppearanceEditorPart.cs
- ToolStripContainer.cs
- WebBaseEventKeyComparer.cs
- ListParaClient.cs
- LayoutTableCell.cs
- ConfigurationValues.cs
- LeafCellTreeNode.cs
- OleServicesContext.cs
- assemblycache.cs
- EndPoint.cs
- InfocardClientCredentials.cs
- GridViewItemAutomationPeer.cs
- FunctionNode.cs
- WebPartsPersonalizationAuthorization.cs
- DataServiceHostWrapper.cs
- OdbcException.cs
- JsonFormatGeneratorStatics.cs
- FixedPageStructure.cs
- SHA1CryptoServiceProvider.cs
- _LocalDataStoreMgr.cs
- Padding.cs
- Thumb.cs
- ClientUrlResolverWrapper.cs
- ParagraphVisual.cs
- CompositeActivityDesigner.cs
- InputDevice.cs
- HtmlTableCellCollection.cs
- SqlMethodTransformer.cs
- WebSysDefaultValueAttribute.cs
- PrintPreviewGraphics.cs
- ReadOnlyPermissionSet.cs
- WebBrowserPermission.cs
- Matrix.cs
- SecurityTokenInclusionMode.cs
- ProcessModelSection.cs
- WebBrowser.cs
- ArgumentException.cs
- WbemException.cs
- PageAsyncTask.cs
- CodeSnippetCompileUnit.cs
- Button.cs
- PathNode.cs
- handlecollector.cs
- TrackingCondition.cs
- LinkedList.cs
- MarkupCompilePass1.cs
- StringCollection.cs
- EditorBrowsableAttribute.cs
- CompilationUtil.cs
- NavigationProgressEventArgs.cs
- TextSelectionHelper.cs
- CachingHintValidation.cs
- ModelItemExtensions.cs
- WebPartHelpVerb.cs
- WebPartConnectVerb.cs
- CodeDirectionExpression.cs
- Attachment.cs
- TypeConverterHelper.cs