Working with memory mapped files in .NET 4

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.Net Framework 4.0: Using memory mapped files

Gunnar Peipman's ASP.NET blog — Sun, 21 Jun 2009 12:58:56 GMT

.Net Framework 4.0 introduces memory mapped files. Memory mapped files are useful when you need to do

re: Working with memory mapped files in .NET 4

Cameron — Wed, 24 Jun 2009 18:07:47 GMT

Is it possible to use memory mapped files in VS2008, with the Net Framework 4 beta 1 installed on a box?

Thank you,

Great article

re: Working with memory mapped files in .NET 4

Salva Patuel — Wed, 24 Jun 2009 20:32:03 GMT

Hi Cameron,

VS2008 does not know how to handle .NET 4 unfortunately. Therefore the IDE can not use the new compiler. You can write the code but you will need to manually call the VS2010 compiler to link it to .NET 4.

You can still use memory mapped files in VS2008 using PInvoke, but I imagine that is not the solution that you are looking after.

Regards,

Salvador

re: Working with memory mapped files in .NET 4

E. Scott Anderson — Thu, 20 Aug 2009 16:27:20 GMT

Salva,

Could you please elaborate more on how to "manually call the VS2010 compiler to link it to .NET 4." I am thinking that I would like to take the approach where I write a DLL in VS2010 .NET 4.0 to handle the reading-writing/caching of the data in the memory mapped file and reference this DLL in my VS2008 .NET 3.5 project. The reason is that my application is heavily dependent on MS Robotics Studio which is not 4.0 ready, but I need to process very large image data sets.

Thanks,

Scott

re: Working with memory mapped files in .NET 4

Salva Patuel — Tue, 25 Aug 2009 00:54:11 GMT

Hi E. Scott Anderson

The short answer is you can't. You can do it the other way around as .NET 4 allows you to run side-by-side libraries (i.e running a .NET4 app and referencing a .NET 2/3/3.5 DLL). The problem is that the process running under CLR 2 (.net 2/3/3.5) does not know how to interpret a DLL compiled under CLR 4.

You can still access the memory mapped files using the PInvoke model, it works very well.

You can find more info here: http://msdn.microsoft.com/en-us/library/ms810613.aspx

Regards