Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / PropertyPathConverter.cs / 1 / PropertyPathConverter.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: PropertyPathConverter.cs // // Description: Contains converter for creating PropertyPath from string // and saving PropertyPath to string // // History: // 05/15/2004 - peterost - Initial implementation // //--------------------------------------------------------------------------- using System; using System.ComponentModel; using System.Collections.ObjectModel; using System.Text; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Windows; using System.Windows.Markup; using MS.Internal; using MS.Utility; #pragma warning disable 1634, 1691 // suppressing PreSharp warnings namespace System.Windows { ////// PropertyPathConverter - Converter class for converting instances of other types /// to and from PropertyPath instances. /// public sealed class PropertyPathConverter: TypeConverter { //------------------------------------------------------------------- // // Public Methods // //------------------------------------------------------------------- #region Public Methods ////// CanConvertFrom - Returns whether or not this class can convert from a given type. /// ////// bool - True if this converter can convert from the provided type, false if not. /// /// The ITypeDescriptorContext for this call. /// The Type being queried for support. public override bool CanConvertFrom(ITypeDescriptorContext typeDescriptorContext, Type sourceType) { // We can only handle strings if (sourceType == typeof(string)) { return true; } else { return false; } } ////// CanConvertTo - Returns whether or not this class can convert to a given type. /// ////// bool - True if this converter can convert to the provided type, false if not. /// /// The ITypeDescriptorContext for this call. /// The Type being queried for support. public override bool CanConvertTo(ITypeDescriptorContext typeDescriptorContext, Type destinationType) { // We can convert to a string. if (destinationType == typeof(string)) { return true; } else { return false; } } ////// ConvertFrom - Attempt to convert to a PropertyPath from the given object /// ////// The PropertyPath which was constructed. /// ////// An ArgumentNullException is thrown if the example object is null. /// ////// An ArgumentException is thrown if the example object is not null and is not a valid type /// which can be converted to a PropertyPath. /// /// The ITypeDescriptorContext for this call. /// The CultureInfo which is respected when converting. /// The object to convert to a PropertyPath. public override object ConvertFrom(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object source) { if (source == null) { throw new ArgumentNullException("source"); } if (source is string) { return new PropertyPath((string)source, typeDescriptorContext); } #pragma warning suppress 6506 // source is obviously not null throw new ArgumentException(SR.Get(SRID.CannotConvertType, source.GetType().FullName, typeof(PropertyPath))); } ////// ConvertTo - Attempt to convert a PropertyPath to the given type /// ////// The object which was constructed. /// ////// An ArgumentNullException is thrown if the example object is null. /// ////// An ArgumentException is thrown if the example object is not null and is not a Brush, /// or if the destinationType isn't one of the valid destination types. /// /// The ITypeDescriptorContext for this call. /// If this is null, then no namespace prefixes will be included. /// The CultureInfo which is respected when converting. /// The PropertyPath to convert. /// The type to which to convert the PropertyPath instance. public override object ConvertTo(ITypeDescriptorContext typeDescriptorContext, CultureInfo cultureInfo, object value, Type destinationType) { if (null == value) { throw new ArgumentNullException("value"); } if (null == destinationType) { throw new ArgumentNullException("destinationType"); } if (destinationType != typeof(String)) { throw new ArgumentException(SR.Get(SRID.CannotConvertType, typeof(PropertyPath), destinationType.FullName)); } PropertyPath path = value as PropertyPath; if (path == null) { throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, value.GetType(), typeof(PropertyPath)), "value"); } if (path.PathParameters.Count == 0) { // if the path didn't use paramaters, just write it out as it is return path.Path; } else { // if the path used parameters, convert them to (NamespacePrefix:OwnerType.DependencyPropertyName) syntax string originalPath = path.Path; Collection
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