Calling DLL from strategy

[ScottB]

Thanks that is it; I am using VS 2010 and .NET 4

[brucieW]

No problem Scott. I discovered this through trial and error. Unfortunately Ninja Trader doesn't mention this incompatibility issue anywhere. I'm sure there are a lot of 2010 users out there who are going to run into this sooner or later. Hopefully the support team knows about it now. It would be a good idea to mention it in the release notes.

[ScottB]

brucieW, have you found any way around this? I still have VS2008 installed but with the exception of the compact framework, everything looks to be .NET 4.0.

I have other projects going on so I can't just roll back to an earlier .NET; yikes. I really want this stuff in a dll and not methods in NT itself.

[NinjaTrader_Bertrand]

Scott, I believe you should be able to set the target versions in your advanced compiler settings for VS.

[ScottB]

Bertrand, thanks, I don't usually have to do that but now that I think about it, that will work.

[brucieW]

What I did was create a control library (DLL) project that targeted .NET 3.5 which I call from Ninja Trader. This library calls a service that still uses .NET 4 code. There is no way around this (until they make a release that can handle .NET 4.0). You have to make sure that this 3.5 library does not indirectly reference any other .NET 4 libraries. A real pain.

[carmiFR]

same pb

hi,

I have the same problem ... turning to 3.5, restarting, etc. did not change anything ...

Any idea ?

OS = win7 sp1, 64bits, .NET 3.5

thanks,

Fab

[carmiFR]

still the problem

Hi,

I have still this problem after a lot of checks based on the previous messages.

I tryied with a dll containing a very simple class :


namespace ClassLibrary1
{
public class Class1
{
public static int foo()
{
return 123456;
}
}
}



And in my strategy :



protected override void OnStartUp()
{
Log("read:"+ ClassLibrary1.Class1.toto(), LogLevel.Error);
}



Compile : ok
Runtime : can't find dll ...

Any idea?

Thanks

Fab

[NinjaTrader_Austin]

Fab, have you added the reference by right-clicking the editor window and selecting references?

[brucieW]

NT will only work with 3.5 libraries, have you checked the properties of the DLL?

[carmiFR]

NT will only work with 3.5 libraries, have you checked the properties of the DLL?

Now it is working !

So the procedure for the ones which will have this problem :

1 - develop your dll, en c#, .NET 3.5, 64 bits if you intend to use NT 64bits
2 - copy the dll into <home>/nt7/bin/custom
3 - in the code interface of the stratgy, right-click, select "add reference" and select <home>/nt7/bin/custom/mydll.dll you copied at step 2
4 - restart ninja
5 - use your dll into the code of the strat
6 - test, should work

[d.allen101]

Has anyone come up with a work around and/or solution for running .dll files that are built with .net 4.0?

[brucieW]

Will only work with 3.5

NT will only link to 3.5 DLLs, pain in the bum. Until NT rebuild using 4.0, you won't get it working.

[d.allen101]

hey bruce, i was reading in one of your replies where you mentioned something about a "control library" you wrote that targeted .net 3.5 etc...how is that working out? can you give a little detail on that?

[VTtrader]

d.allen,
I believe bruicieW was writing/compiling the library using .NET 3.5. That would assume you have the source code for the .dll and some ability (such as Visual Studio) to specify targeting the compilation to .NET 3.5. It also would mean that the source code wasn't using .NET 4 specific features.

VT