How to create a memory mapped file in a service?

[occam]

Hi, I'm trying to create a memory mapped file file using

var mmf = MemoryMappedFile.CreateFromFile(@"C:\\Temp\\XMLFile.xml", FileMode.Open, "memMapFile");

in the OnStart() of the service class. The mmf gets created, but trying to access it from an application using

var mmf = MemoryMappedFile.OpenExisting("memMapFile");

leads to a FileNotFoundException. When the file is created in an application instead in a service, this works. What am I missing? Thanks for your help!

[Ciumac Sergiu]

You need to create an inter-process memory map file with MemoryMappedFile.CreateNew method. In this way you'll be able to access it from different processes.

[PIEBALDconsult]

Is it a local variable in the method? Or a member of the class?

[PIEBALDconsult]

Not if he's only accessing it from the Service, not from other processes.

[occam]

Thanks for your reply Ciumac! I went trough the description of the MemoryMappedFile class, but couldn't figure why MemoryMappedFile.CreateFromFile should deliver a result different than MemoryMappedFile.CreateNew. Nevertheless I tried it out - no success!

[occam]

Thanks PIEBALDconsult! It was a local variable. Best regards!