Get Property Value of Nested Classes is always null

The problem in this case is that when you split the string employee.Child.ChildName, the "employee" is the first part. However, employee is not a property of the source i.e. Employee Class.

Try this:

public class Program
{
    public static void Main()
    {
        Employee employee = new Employee();
        employee.Name = "Ram";
        employee.Id = 77;
        employee.Child = new Family() { ChildName = "Lava" };
        GetPropertyValue(employee, "employee.Child.ChildName");

    }


    public class Family
    {
        public string ChildName { get; set; }
    }

    public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public Family Child { get; set; }

    }

    public static object GetPropertyValue(object src, string propName)
    {
        string[] nameParts = propName.Split('.');

        if (nameParts.Length == 1)
        {
            return src.GetType().GetRuntimeProperty(propName).GetValue(src, null);
        }
        nameParts = nameParts.Skip(1).ToArray();
        foreach (String part in nameParts)
        {
            if (src == null) { return null; }

            Type type = src.GetType();

            PropertyInfo info = type.GetRuntimeProperty(part);

            if (info == null)
            { return null; }

            src = info.GetValue(src, null);
        }
        return src;
    }

Here, i have skipped the first part of the string i.e. "employee". However, you can solve the problem by passing Child.ChildName

This question is around 2 years old, but I found a another working solution for you question, which is easy to understand. If you initialize the object in calling calss constructor you can use dot(.) notation to assign or read property. Example -

public class Family{
    public string ChildName { get; set; }
}

public class Employee{
    public int Id { get; set; }
    public string Name { get; set; }
    public Family Child { get; set; }

    public Employee(){
        Child = new Family();
    }
}

Employee emp = new Employee();
emp.Family.ChildName = "Nested calss attribute value";