Dynamically set list object type in c#

Question

I have a List object that I need to be able to swap the object type dynamically. Basically I have:

List<DataBaseItems> items = new List<DataBaseItems>();

I will then perform some filtering on that list with LINQ then bind to a telerik grid. I need to swap out the object based on an id that i get. My goal is to build a custom control that can use it's filter button for multiple reports where the report data is coming from the above list. Report A may use the above list and report B needs a completely different object but has the same actions on it.

Use generics, OR add a common interface that is supported by all the objects you want to use in such a list/situation, and program against the interface instead of the concrete objects. OR use reflection. — Lasse V. Karlsen
– Lasse V. Karlsen, Commented Jul 18, 2014 at 15:21

Beakie · Accepted Answer · 2014-07-18 15:24:17Z

1

Create an interface and implement it into whatever objects you implement.

answered Jul 18, 2014 at 15:24

Beakie

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sm_ · Accepted Answer · 2014-07-18 15:34:53Z

0

public interface ICustomListFilter<T> 
       where T:class
{
    public void FilterAndBindMyList(List<T> myList);
}

public class ReportOneFilter:ICustomListFilter<MyFirstType>
{
    public void FilterAndBindMyList(List<MyFirstType> items)
    {

        // your filtering and binding code goes here, such as items.Where(i => ...
    }
}

public class ReportTwoFilter:ICustomListFilter<MySecondType>
{
    public void FilterAndBindMyList(List<MySecondType> items)
    {

        // your another filtering and binding algorithm goes here, such as items.Select(i => ...
    }
}

answered Jul 18, 2014 at 15:34

sm_

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