Question

Is there someone who can please explain why the following is not working??:
the model is defined like this (very simple version)

 public class Monument
{
        [Key]
        public int? MonumentId { get; set; }
        public string Name { get; set; }
}

The Find method in my repository implementation is defined like this:

public virtual IQueryable<T> Find(Expression<Func<T, bool>> where)
{
    return _dbset.Where(where);
}

The where parameter gets a value this way:

 whereClause = c => (   (FilteringRecord.MonumentId <= 0 ? 
true : c.MonumentId == FilteringRecord.MonumentId) 

&& (String.IsNullOrEmpty(FilteringRecord.Name) ? 
true :c.Name.Contains(FilteringRecord.Name))        );

So if the value of FilteringRecord.MonumentId is equal to a number i get the desired record, but if the FilteringRecord.Name has a value it’s completely ignored!! Why???

The same works fine on the first version of Entity Framework or LINQ to SQL!!

Thanks in advance!!

Answer 1

Turns out that the expression is working as expected! The error was caused by a wrong binding in the UI (this is a WPF application), giving wrong values to FilteringRecord!