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Killing com

I am being told that .net is actually going to substitute COM. Infact i have read an article which says that microsoft is killing COM. I being totally unaware about what .net is all about wants to know is COM going to give way to .net? Infact i am not sure whether my question makes any sense! But if it does then pls answer it

Éric Moreau

COM is dead. You will not need to register components anymore. You will be able to have multiple version of the same components for your applications.

We are back about to VB3 era when we distribute the VBX right beside the EXE!

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rspahitz

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rspahitz

emoreau, based on your exclamation point, I sense that you have some opinions about going back to the VB3 way.

Here's what I see as the "ideal" way:

You deliver everything that is needed for your project.
When it's installed, it checks to see if there is a matching object already registered (same version, date, size, etc.) If so, it does not install that component. If the component does not exist, it installs and registers it. If there's a mismatch, it asks if you'd like to install and register the new item (in addition to the previous), replace the old item, or use the old item and ignore the new one (with possible problems.)

The problems we had in VB3 were that multiple items had to be installed in order to get the app to run, even if they were already installed elsewhere on the machine. For example, the runtime object had to be installed in every directory where the executables existed...or in a valid path entry had to be established--which led to people having paths that where hundreds of characters long.

Any thoughts on what the future may hold?

Éric Moreau

Visual Component Manager is only a repository and have nothing to do with the subsitance of COM.

In early version of WebServices (AKA SOAP), we used COM components (with an extra layer) because VS.Net was not existing.

ameba

LOL, rspahitz, noone asked what was new in VS6.

The basic difference between COM and NET is how components are finalized (removed from memory). COM model uses 'reference count' and is slow and predictable; the other model is simpler, faster, but I don't think it's much better.

MS didn't replace everything to work the NET way, and we'll be using COM for long time, via Interop (layer between NET and COM component)

rspahitz

Hmmm...MS led me to the wrong page? I clicked from somnewhere around this area: http://www.microsoft.com/net/develop/developers.asp

No wonder it all looked familiar!!!

billy21

I read somewhere that .Net doesn't yet support everything that com does support. It wasn't specific but was implying that com will be around for a while yet.

ameba

from http://www.vb2themax.com/HtmlDoc.asp?Table=Books&ID=7200
"... utilizing a recordset with a server side cursor, which cannot be achieved with ADO.NET. In both these types of situations, Interop comes to the rescue by enabling the use of classic ADO technology. Also, there are some other technologies, complementing ADO, such as Microsoft ActiveX Data Objects Extensions for Data Definition Language and Security ( ADOX), Jet Engine and Replication Objects (JRO) and ADO for Multi-Dimensional Data (ADOMD) that are not supported by ADO.NET."

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chikersal

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Dear netminder

do u want me to remove my questions or do u want me to accept a comment as an answer bcos i tried to remove those questions but could not. so pls tell me and i will do the needful immediately

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