public void BuildPropertyGetter()
{
//It is much more efficient to compile a getter function using expression trees and reuse it (instead of directly using reflection each time you need this).
var author = new Author();
author.FirstName = "Dan";
author.LastName = "Misailescu";
author.Age = 29;
var author2 = new Author();
author2.FirstName = "Gheorghe";
author2.LastName = "Popescu";
author2.Age = 20;
var firstNameGetter = _reflectionHelper.BuildPropertyGetter(author.GetType(), "FirstName");
Assert.AreEqual("Dan", firstNameGetter(author));
var lastNameGetter = _reflectionHelper.BuildPropertyGetter(author.GetType(), "LastName");
Assert.AreEqual("Misailescu", lastNameGetter(author));
var ageGetter = _reflectionHelper.BuildPropertyGetter(author.GetType(), "Age");
Assert.AreEqual(29, ageGetter(author));
var authors = new List <Author>()
{
author, author2
};
var authorsByAge = authors.OrderBy(o => ageGetter(o)).ToList();
Assert.AreEqual(20, authorsByAge[0].Age);
Assert.AreEqual(29, authorsByAge[1].Age);
var authorsByFirstName = authors.OrderBy(o => firstNameGetter(o)).ToList();
Assert.AreEqual("Dan", authorsByFirstName[0].FirstName);
Assert.AreEqual("Gheorghe", authorsByFirstName[1].FirstName);
}
