Static class info across multiple application instances?

Jacobus01

If I change a static class variable in one application instance and I have multiple instantiated applications using the same dll will I be able to see that specific modification from one of my other applications? I'm thinking yes but I'd like to know for a fact. Any words of wisdom? Thanx

Luc Pattyn

No. Instance data as well as static data only exists inside a single process. In order to share data amongst applications, you must take special steps and use one of many available mechanisms, e.g. memory-mapped files. :)

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Jacobus01

Can you maybe elaborate on these mechanisms?

Luc Pattyn

There are lots of mechanisms; whatever your need may be, a few of them will fit well. Search for "interprocess communication", and read the documentation, there is plenty of it. :)

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Jacobus01

Thank you

S Senthil Kumar

Remoting the static instance is an option. Remoting offers out of the box support for singletons.

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ely_bob

This isn't fully correct... there is a method.. not for the feint of heart.. you can go into the .prj (or.sln) file and make a manual reference to the location of the dll that you compile from the static class (for each project that you want to reference that particular dll) I've never done it (needed to do it) myself but I've heard about it... come to think of it you can basically do this by add>existing project> your_dll.sln then whenever you modify your_dll.sln it will be compiled into your other programs.. did I ramble.. sorry.

Luc Pattyn

ely_bob wrote:

whenever you modify your_dll.sln it will be compiled into your other programs..

you can add the same code to several processes, that does not magically make them share some data; unless the code you are sharing is taking care of interprocess communication, but then you don't need a DLL for that.

ely_bob wrote:

did I ramble

a bit (if not a byte) :)

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