I was thinking of IList<Post>, not IList - sorry about that - the
constructor only accepts a type-safe collection.
If you need a List<Post> from a non-type-safe collection, you'll have
to manually convert it to a List<Post>:
List<Post> postList = new List<Post>(posts.Count);
foreach (Post post in posts)
{
postList.Add(post);
}
On Mar 24, 5:09 am, graphicsxp <[email protected]> wrote:
> Thanks,
> I've tried your suggestion but I get a compilation error :
>
> Cannot resolve constructor 'List(System.Collections.IList)',
> candidates are :
> List(int) (in class List<Post>)
> List(System.Collections.Generic.IEnumerable<Metrica.Post>) (in class
> List<Post>)
>
> Any idea what I can do ?
>
> On 20 mar, 14:18, Joe Enos <[email protected]> wrote:
>
> > When you're doing a direct cast like that, if the variable is not of
> > type List<Post> or a descendant, then the cast will not succeed. Your
> > "posts" variable is apparently of type Post[] or Collection<Post> or
> > ArrayList or something other than List<Post>, which means a direct
> > cast is impossible. Collection types aren't generally
> > interchangeable.
>
> > What you can do is:
> > List<Post> myPosts = new List<Post>(posts);
>
> > This takes the collection of Post objects inside of posts and adds
> > them to a new list. It's not a cast, but rather a conversion.
>
> > On Mar 20, 3:47 am, graphicsxp <[email protected]> wrote:
>
> > > Hello,
>
> > > I've got two classes, CGMPost and MSMPost, which both inherits from a
> > > class Post.
>
> > > I have a IList called 'posts' that contains a collection of CGMPost
> > > and MSMPost entities.
>
> > > If I do that :
>
> > > List<Post> myPosts = posts as List<Post>;
>
> > > then myPosts is null (altough posts contains 7 entities of type
> > > CGMPost and MSMPost).
>
> > > Why is that ?
