Dynamically evaluating a property string with Expressions

Question

How do I build an expression that will fulfill the following goal:

public object Eval(object rootObj, string propertyString)

eg: Eval(pers

Answer 1

Here's a recursive version of p.s.w.g's code, working with Expressions.

public Expression Eval(Expression expression, string property)
{
    var split = property.Split('.');
    if (split.Length == 1)
    {
        return Expression.PropertyOrField(expression, property);
    }
    else
    {
        return Eval(Expression.PropertyOrField(expression, split[0]), property.Replace(split[0] + ".", ""));
    }
}