[Gtk-sharp-list] Apparently trivial: problem casting from object
jymdman at home.se
Tue Jan 17 15:35:44 EST 2006
Get the values like this instead:
int x = (int)m.GetValue (a, 3);
int y = (int)m.GetValue (b, 3);
and I think it will work better for you!
Callum J. Bell wrote:
> I'm posting to this group because the origin of the problem is sorting
> columns in a ListStore that is a model for a TreeView. I want to sort
> a column of integers so I started writing a sortfunction:
> public int int_compare(TreeModel m, TreeIter a, TreeIter b)
> GLib.Value x = new GLib.Value();
> GLib.Value y = new GLib.Value();
> m.GetValue(a,3,ref x);
> m.GetValue(b,3,ref y);
> // At runtime the next two lines throw: Unhandled Exception:
> //System.InvalidCastException: Cannot cast from source type to
> //destination type.
> int i = (int)(x.Val);
> int j = (int)(y.Val);
> // But x.Val does contain an integer that gets unboxed correctly
> // here:
> System.Console.WriteLine(">> " + x.Val + " <<");
> // Never got this far...
> //return i.CompareTo(j);
> // This is for debugging
> return 1;
> It looks to me as if the cast should work. Any ideas? Also, if there
> are sortfunctions out there for various types I'd appreciate a pointer
> to them.
> Gtk-sharp-list maillist - Gtk-sharp-list at lists.ximian.com
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