Question

I want to convert this to a generic type:

using System.Linq.Expression
using System.Collections.Generic

public IQueryable<T> AllIncluding(
                          params Expression<Func<T, object>>[] includeProperties)
{
    IQueryable<T> query = All;
    foreach (var includeProperty in includeProperties)
    {
        // query = query.Include(includeProperty);
    }
    return query;
}

But it doesn’t seem to work, how would i do this?

Answer 1

The Include method is available only on DbQuery<T> so you have to cast the query to it using a direct cast or the as operand or use the method DbExtensions.Include:

public IQueryable<T> AllIncluding(
    params Expression<Func<T, object>>[] includeProperties)
{
    IQueryable<T> query = All as DbQuery<T>;
    if (query == null)
    {
       return All;
    }

    foreach (var includeProperty in includeProperties)
    {
        // query = query.Include(includeProperty);
    }
    return query;
}