Question

I have a grid control that have a DataSource property as Object, Now I want to cast my DataSource to IQueryable<T> to take and skip Like this code

var pagedData = ((IQueryable<T>) DataSource).Skip(20).Take(10);

But I don’t know how can I cast Object to IQueryable<T>? also most of the time type of data is IQueryable<AnonymousType>.

Answer 1

There will almost certainly be better ways to deal with this, but to answer your question as asked, you can use dynamic:

private static IQueryable<T> GetInteriorElements<T>
                (IQueryable<T> source, int skip, int take)
{
    return source.Skip(skip).Take(take);
}

And call it as:

object DataSource = ...

// The real question is: what are you now going to do with this?
var pagedData = GetInteriorElements((dynamic)DataSource, 10, 20);

If you are on .NET 3.5, you’ll have to use reflection, unfortunately.