[C#] Error Help

I dont know how to explain my problem, but here it is:

I have a client/server communication going on, and on client connect, it sents "NM" + Username. The server pickets up that 'packet' and adds the Username to the hashtable storing all the clients.

PHP Code:

---

frmLobby.Clients.Add(frmLobby.Lobby.GetClientNum(), Data.Substring(2)); 


---

GetClientNum() Gets a free number in the hashtable.
The data added to the hashtable is Data.Substring(2).

It works for the server, but when the server sends that information to the client, ("NM" + UserName) (i have a loop so each user stored in the hastable is send), the client side gives me an error

Quote:

---

Object reference not set to an instance of an object.

---

The code works for the server but not the Client, and i dont see what the problem could be. I have been trying to figure this out for a couple days already and its starting to make me mad.

With that little code all i can guess is you are trying to access a form outside of its normal thread.

You need to read up on delegate and invoke in form threads (my guess based on the error on the code you supplied).

Quote:

---

Originally Posted by Bmsfx

With that little code all i can guess is you are trying to access a form outside of its normal thread.

You need to read up on delegate and invoke in form threads (my guess based on the error on the code you supplied).

---

Did all of that. That code works for server form but not for the client side.

well, then try popping up a messagebox and see what data you have in

frmLobby.Lobby.GetClientNum() and Data.Substring(2)

guessing 1 of them is not initialized or contains no data

again, based on that 1 line of code you supplied.

OR

do like the rest of us
try debugging, set breakpoint at

frmLobby.Clients.Add(frmLobby.Lobby.GetClientNum(), Data.Substring(2));

see what data you have there, if any, see if its initialized ect ect, debugging is your friend in these cases.

could be thats not even the problem, could be the hasttable that has issues with the storing of data ect, thats why MS made the debug.

ook ill do the debuggin thing. But i have set up a message box up for when data comes in and it has the info it needs. It just stumps me by how the code works serverside but no clientside.. Its weird. But yea ill set a breakpoint and go through the dubugging process.

i know is beacause you dont set a instance for an object

example Class object = new Class();

try : <Class> frmLobby = new <Class>() (i dont know the name of class you used)