Question

Let’s say I have a class like:

public class Foo
{
    public string Title {get;set;}
}

Now, let’s assume I have a public List<Foo> myList which I want to filter by Linq as so:

var x = myList.Where(f => f.Title == myValue);

Everything is nice and clear until now.

But how can access the property by variable? Something like:

string myProperty = "Title";

var x = myList.Where(f => f.myProperty == myValue);

Answer 1

You can write an extension method

public static class MyExtensions
{
    public static object GetProperty<T>(this T obj, string name) where T : class
    {
        Type t = typeof(T);
        return t.GetProperty(name).GetValue(obj, null);
    }
}

and use it like this

var x = myList.Where(f => f.GetProperty("Title") == myValue);