how to allow the user to choose how to sort his list using a variable?

Question

the information that the user enters can be sorted in many ways ascending and descending and i\'m trying to make the user choose how he want to see the data:

so is there

Answer 1

If I understood your problem right, that you want to sort dynamically with the property name which is stored in emsort.Text, then you can use Expressions:

assuming empName is IEnumerable, then use this:

private static Func GetSortable(string sortablePoperty)
    {
        var param = Expression.Parameter(typeof(Employee), "e");
        var member = Expression.Property(param, sortablePoperty);
        Expression memberAsObject = Expression.Convert(member, typeof(object));
        return Expression.Lambda>(memberAsObject, param).Compile();
    }

then use it:

string sort=emsort.Text ;
empName.OrderBy(GetSortable(sort));

if empName is IQueryable, then use this:

private static Expression> GetSortable(string sortablePoperty)
    {
        var param = Expression.Parameter(typeof(Employee), "e");
        var member = Expression.Property(param, sortablePoperty);
        Expression memberAsObject = Expression.Convert(member, typeof(object));
        return Expression.Lambda>(memberAsObject, param);
    }