Question

i have this few lines of code

FilterCondition CustomerID = new FilterCondition("Customer_ID",cust.Customer_ID,FilterCondition.FilterOperator.Equals);
        List<FilterCondition> conditions = new List<FilterCondition>();
        conditions.Add(CustomerID);
        conditions.Add(Location_is_last_used);
        Location loct = Store.Select<Location>(conditions).First();

I tried to make it work like this

Store.Count<Customer>(new List<FilterCondition>().Add(new FilterCondition("Customer_name",name,FilterCondition.FilterOperator.Equals))

But this wont work because Add returns void and its running me crazy, is there any other way to solve this in one line? i realy dont want to write conditions for everything that i need.

Tnx for help!
Regards,
Luka

Answer 1

You could write an extension method:

public static class MyExtensions
{
    public static ICollection<T> AddChainable<T>(this ICollection<T> collection, T newItem)
    {
        collection.Add(newItem);
        return collection;
    }
}

You could then invoke this as follows:

Store.Count<Customer>(new List<FilterCondition>().AddChainable(new FilterCondition("Customer_name",name,FilterCondition.FilterOperator.Equals));

(assuming Store.Count<T> works on ICollection<T>, which introduces the Count property, otherwise adapt the collection type appropriately.

The advantage over the list initializer syntax is that you could use this also for already created list objects (e.g. if you get the list object from a factory method).