Property Name Extension Method
using System; | |
using System.Linq.Expressions; | |
public static class PropertyNameExtensions | |
{ | |
/// <summary> | |
/// Extension method for exposing the name of properties without resorting to | |
/// magic strings. | |
/// Use: objectReference.PropertyName( x => x.{property} ) to retrieve the name. | |
/// I.e. objectReference.PropertyName( x => x.IsActive ); //will return "IsActive". | |
/// </summary> | |
/// <returns> | |
/// Property name of the property expression provided. | |
/// </returns> | |
public static string PropertyName<T, TReturn>(this T obj, Expression<Func<T, TReturn>> property) where T : class | |
{ | |
MemberExpression body = (MemberExpression)property.Body; | |
if (body == null) | |
throw new ArgumentException("The provided expression did not point to a property."); | |
return body.Member.Name; | |
} | |
} |
using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using Spynical.Test.NUnit; | |
using NUnit.Framework; | |
using System.Linq.Expressions; | |
namespace PySty.Common | |
{ | |
public class PropertyNameUnitTests : BaseTestFixture | |
{ | |
[Test] | |
public void EnsurePropertyNameCanExtractPropertiesFromObjectInstance() | |
{ | |
var testObject = new SomeTestObject(); | |
Assert.AreEqual("SomeValue", testObject.PropertyName(x=>x.SomeValue)); | |
Assert.AreEqual("SomeOtherValue", testObject.PropertyName(x=>x.SomeOtherValue)); | |
Assert.AreEqual("SomeKey", testObject.PropertyName(x => x.SomeKey)); | |
} | |
[CoverageExclude(CoverageExcludeAttribute.TestStubClass)] | |
private class SomeTestObject : SomeBaseObject | |
{ | |
public string SomeValue | |
{ | |
get; | |
set; | |
} | |
public int SomeOtherValue | |
{ | |
get; | |
set; | |
} | |
} | |
[CoverageExclude(CoverageExcludeAttribute.TestStubClass)] | |
private class SomeBaseObject | |
{ | |
public int SomeKey | |
{ | |
get; | |
set; | |
} | |
public string SomeMethod() | |
{ | |
return string.Empty; | |
} | |
} | |
} | |
} |
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I've Added Converted to MS Test PropertyNameUnitTests in https://gist.github.com/MNF/5208179 |
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Corrected some formatting issues that were introduced when I had added the code to my blog.