Swaine777

I'm at a loss here. I'm trying to run a function with certain
parameters according to which item the user selects in a listbox.
I've tried all kinds of different casting methods to try to change
the item of the listbox into an int or a char so I could use it in a
switch statement but C++.NET 2k3 doesn't like whatever I try.
I'm pretty sure that the item coming from the listbox is a
managed Object*. Am I right?

I've tried some things like this:

As far as I know, there's no ->ToInt() method.

Also, if you want to fill a listbox with items (a collection?) and
you started your project as an empty managed C++ project,
what's the best way to fill the listbox with items? I just want to
put numbers 1 - 12 in the listbox, unordered (so i don't get 1,
10, 11, 12, 2, 3...). I'd like to center the items in the listbox
too.

Thanks a bunch for any help you can provide.

Swaine777

Swaine777

22 views but no replies...did I stump everyone else too? /

Swaine777

Koyaanisqatsi

Maybe the lack of answers is because a listbox is nothing wich belongs to Standard C++. For Windows you get more answers in WINAPI-Forum, on .NET you get more answers in the C#-Forum.

knutso

Depends on what you want:
I think you have to find out what info you want on the item:
-If you want the string, you have to find out the name of the submember of the listitem struct that contains this ie. listboxRadStr->SelectedItem->InfoString
-If you want the index, you select the index member of the struct ie. listboxRadStr->SelectedItem->index

As to adding items: If this is a standard listbox, you can add by using the LB_ADDSTRING message.

xErath

You can only cast types to types with same size, except for primitive types (char,short, long,float,double), and that includes casting pointers. a pointer by default is 32 bit long. Casting pointers should work almost always. Try casting to void or something... or even a memcpy(...,...,4);

Hunter2

You can only use integers in a switch statement; strings (i.e. arrays) don't work, and I'm not totally sure if pointers will work either even though they seem to act like integers. If pointers DO work, you might get unexpected results if you're trying to compare the data pointed to by the pointers in the switch, because even if two pointers don't point to the same location, the data they point to may have the same value but won't be recognized as the 'same' anyway. If you're trying to compare strings, you'll need if/else-if unless you have a hash algorithm that will convert your strings into integers - and that's generally more trouble than it's worth (and potentially less efficient too).

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JaWiB

If you have the name of the listbox item you should be able to use the LB_FINDSTRING message to return the index of the item.

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Hunter2

>>to return the index of the item.
I don't believe the problem is one of finding the index of an item. He's trying to use the value of the currently selected listbox item (using .NET stuff it looks like) in a switch statement.

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JaWiB

Yes well I was thinking he could get the index and use that in his switch statement instead. Just a thought...

__________________
"Think not but that I know these things; or think
I know them not: not therefore am I short
Of knowing what I ought."
-John Milton, Paradise Regained (1671)

"Work hard and it might happen."
-XSquared