Basically I am doing it like this.
private static Expression<Func<Student, bool>> ProcessCriteria
(SearchCriteria.StringValue criteria)
{
if (criteria.FieldName == "FirstName") { return
BuildFirstName(criteria.Value, criteria.Comparer); }
}
private static Expression<Func< Student, bool>> BuildFirstName(string
value, StringFilterType comparer)
{
switch (comparer)
{
case StringFilterType.Contains:
return (s) => s.FirstName.Contains(value);
case StringFilterType.EndsWith:
return (s) => s.FirstName.EndsWith(value);
case StringFilterType.Equals:
return (s) => s.FirstName == value;
default:
return (s) => s.FirstName.StartsWith(value);
}
}
This way when i call into the class containing this, i can pass in
just the field name and the comparer type and it knows which set of
comparers.
After this I am combining the Expressions together with this inside my
dataProvider.
var query = _session.Linq<Student>().AsQueryable();
query = StudentSearchCriteriaManager.BuildQuery(query,
criteria);
return query.ToList();
and here is part of the BuildQuery method used to put them together
result = result.Where(ProcessCriteria((SearchCriteria.NumericValue)
item));
break;
On Aug 10, 5:09 pm, John Rayner <[email protected]> wrote:
> Create your own Disjunction object?
>
> Disjunction disj = new Disjunction();
> for(int i = 0; i < numRestrictions; i++)
> disj.Add( Restrictions.Eq( .... ) );
>
> If not this, then please give an example of the sort of code you'd
> like to write.
>
> Cheers,
> John
>
> On Aug 10, 8:15 pm, lukefrice <[email protected]> wrote:
>
>
>
> > I do understand, but I am looking more for something like
> > PredicateBuilder. Is there anything like that that can be used with
> > NHibernate?
>
> > On Aug 10, 1:23 pm, Tuna Toksoz <[email protected]> wrote:
>
> > > this is programatic, you have as much flexibility as your imagination.
> > > ICriterion x=something;
> > > if(something)
> > > x=Restrictions.Or(x,anotherRestriction);
>
> > > if(another)
> > > x=Restrictions.Or(x,anotherthinghere);
>
> > > Can I tell what I mean?
>
> > > Tuna Toksöz
> > > Eternal sunshine of the open source mind.
>
> > >http://devlicio.us/blogs/tuna_toksozhttp://tunatoksoz.comhttp://twitt...
>
> > > On Mon, Aug 10, 2009 at 9:20 PM, lukefrice <[email protected]> wrote:
> > > > way to combine some of them as OR's, or po- Hide quoted text -
>
> > - Show quoted text -
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