{ //provare a dusare
//var param = typeof(QueryDescriptorSort).GetProperty(par.Field);
// if (par.Dir == "asc")
// source.OrderBy(x => param.GetValue(x, null));
//makes expression for specific prop
private static Expression <Func <TSource, object> > GetExpression <TSource>(QueryDescriptorSort property)
{
var param = Expression.Parameter(typeof(TSource), property.Field + "param");
Expression conversion = Expression.Convert(Expression.Property(param, property.Field), typeof(object));
return(Expression.Lambda <Func <TSource, object> >(conversion, param));
}
//makes deleget for specific prop
private static Func <TSource, object> GetFunc <TSource>(QueryDescriptorSort propertyName)
{
return(GetExpression <TSource>(propertyName).Compile()); //only need compiled expression
}
