Client-side vs. Server-side scripts

rweide · #1 (**permalink**) 08-21-04, 20:12

Hi, All,

I need to make sure I understand this concept of server vs. client processing in ASP 3.0.

Can someone tell me the differences for the following codes?

1) <% Set abc = CreateObject("OWC10.Chart") %>
2) <% Set abc = Server.CreateObject("OWC10.CHART") %>
3) <Script Language=VBScript> Set abc = CreateObject("OWC10.CHART") </Script>
4) < <Script Language=VBScript> Set abc = Server.CreateObject("OWC10.CHART") </Script>

I guess I want to know where exactly this "OWC10.CHART" object (or component) the code is trying to use in each of these examples?

Thanks.

rokslide · #2 (**permalink**) 08-22-04, 19:18

for 1 and 2 you can be pretty sure that the object will be on the server... primarily because IIS will recognise the <% as a tag for server side script...

with 3 and 4 it is a little more difficult... they will probably also be on the server but since you are using the <script> tag instead you should really explicitly force the execution at the server..

can you tell us what you are trying to achieve??

rweide · #3 (**permalink**) 08-23-04, 09:07

I am trying to see if the OWC10 component is installed on the client machine or not. If I force it to CreateObject on the client machine and failed, then I know the component is not installed.
I think I understand where it is processed - 1 & 2 are on server and 3 & 4 are on client, but I am confused where and which component (client or server's) it is trying to use to create this object, since both the server and client may have this particular component installed, but may have different versions.

rokslide · #4 (**permalink**) 08-23-04, 19:27

okie then, what you really want to try is something like...

Code:

<Script Language="VBScript" runat="Client"> 
OnError Resume Next
Set abc = Server.CreateObject("OWC10.CHART") 
if Err.Number <> 0 then
  ' do whatever it is you want to do if the component is not installed
else
  ' do whatever it is you want to do if the component is installed
  set abc=nothing
end if
</Script>

that will force the execution of the script to the client (according the msdn)

rweide · #5 (**permalink**) 08-24-04, 08:41

Very well, thank you very much.

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