Do you have control over the Book and Customer classes?
if so you can add an interface to them and then get each class to implement
it differently:
interface IHaveDisplayName {
string DisplayName { get; }
}
then you get:
if(e.Value is IHaveDisplayName) e.Value =
((IHaveDisplayName)e.Value).DisplayName
else e.Value = "Unknown"
that requires some nasty type checking though. I assume e.Value is an
object? if you're in .NET 4.0 you could use dynamic to choose a method to
call on a separate object. Like this:
class DisplayNameFactory
{
public string GetName(object o) { return "Unknown"; }
public string GetName(Book book) { return book.Title; }
public string GetName(Customer customer) { return customer.FullName; }
}
then in your handler you have:
e.Value = displayNameFactory.GetName(e.Value as dynamic);
Probably overkill and comes with a bunch of caveats** but it still works.
** For this to work: All of the methods must have the same name and take the
same number of args in the same order (because of the dynamic lookup). You
should have a method that accepts an object so that if the dynamic dispatch
fails you get something meaningful
--
Michael M. Minutillo
Indiscriminate Information Sponge
Blog: http://wolfbyte-net.blogspot.com
On Wed, Oct 27, 2010 at 9:59 AM, Arjang Assadi <[email protected]>wrote:
> I need to do something similar to do this :
>
> if (e.Value is Book)
> {
> e.Value = (e.Value as X).Title;
>
> }
> else if (e.Value is Customer)
> {
> e.Value = (e.Value as Customer).FullName;
> }
> else
> {
> e.Value = "Unknown";
> }
> etc.
>
> in DataGridView_CellFormatting even, but it just looks plain ugly. is
> there way to do this in a more structured manner?
>
> Regards
>
> Arjang
>
