1a05bf9d63
git-svn-id: file:///srv/devel/repo-conversion/nusu@262 d2e56fa2-650e-0410-a79f-9358c0239efd
71 lines
2.4 KiB
C#
71 lines
2.4 KiB
C#
#region CPL License
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/*
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Nuclex Framework
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Copyright (C) 2002-2012 Nuclex Development Labs
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This library is free software; you can redistribute it and/or
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modify it under the terms of the IBM Common Public License as
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published by the IBM Corporation; either version 1.0 of the
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License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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IBM Common Public License for more details.
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You should have received a copy of the IBM Common Public
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License along with this library
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*/
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#endregion
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using System;
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#if !NO_LINQ_EXPRESSIONS
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using System.Linq.Expressions;
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#endif
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namespace Nuclex.Support {
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/// <summary>Contains helper methods for observing property changed</summary>
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public static class ObservableHelper {
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#if !NO_LINQ_EXPRESSIONS
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/// <summary>Obtains the name of a property from a lambda expression</summary>
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/// <param name="property">
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/// Lambda expression for the property whose name will be returned
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/// </param>
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/// <returns>The name of the property contained in the lamba expression</returns>
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/// <remarks>
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/// <para>
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/// This method obtains the textual name of a property specified in a lambda
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/// expression. By going through a lambda expression, the property will be
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/// stated as actual code, allowing F2 refactoring to correctly update any
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/// references to the property when it is renamed.
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/// </para>
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/// <example>
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/// <code>
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/// string propertyName = ObservableHelper.GetPropertyName(() => SomeValue);
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/// Assert.AreEqual("SomeValue", propertyName);
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/// </code>
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/// </example>
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/// </remarks>
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public static string GetPropertyName<TValue>(Expression<Func<TValue>> property) {
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var lambda = (LambdaExpression)property;
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MemberExpression memberExpression;
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{
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var unaryExpression = lambda.Body as UnaryExpression;
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if(unaryExpression != null) {
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memberExpression = (MemberExpression)unaryExpression.Operand;
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} else {
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memberExpression = (MemberExpression)lambda.Body;
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}
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}
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return memberExpression.Member.Name;
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}
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#endif // !NO_LINQ_EXPRESSIONS
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}
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} // namespace Nuclex.Support
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