Access nested properties with dynamic lambda using Linq.Expression

Question

Let\'s assume that I have two classes:

class person
{
    int ID
    string name
    Address address
}
class address
{
    int ID
    string street
    string co         


        

Answer 1

Try this one

    public static IQueryable SortIQueryable(IQueryable data, string fieldName, string sortOrder)
    {
        if (string.IsNullOrWhiteSpace(fieldName)) return data;
        if (string.IsNullOrWhiteSpace(sortOrder)) return data;

        var param = Expression.Parameter(typeof(T), "i");

        MemberExpression property = null;
        string[] fieldNames = fieldName.Split('.');
        foreach (string filed in fieldNames)
        {
            if (property == null)
            {
                property = Expression.Property(param, filed);
            }
            else
            {
                property = Expression.Property(property, filed);
            }
        }

        Expression conversion = Expression.Convert(property, typeof(object));//Expression.Property(param, fieldName)
        var mySortExpression = Expression.Lambda>(conversion, param);

        return (sortOrder == "desc") ? data.OrderByDescending(mySortExpression)
            : data.OrderBy(mySortExpression);
    }