adding custom library to NT

[sergeysamsonov]

Hello

I have built my own dll with matlab (.Net assembly) and would like to add it to NT.

I registered this dll in GAC by creating a strong name and copying it to C:\WINDOWS\assembly. MWArray is also registered in GAC.

Now I want to call this dll from strategy. I think I need to add this line before I can use my dll:

using mylib.dll;

I did this but when I compile the code, I get this "namespace is not found, are you missing a using directive or assembly reference".

Do I have to add my custom dll somewhere in NT, do I have to specify the path somehow, why GAC assemblies are not accessible from NT?

Please suggest at least starting point for fixing this problem.

Thank you,
Sergey.

[NinjaTrader_RyanM1]

Hello Sergey,

Thanks for the post. Custom assemblies should be stored in:
Documents\NinjaTrader 7\bin\custom

Add a reference to this file from a NinjaScript code editor. Right Click > Reference > Add > Select your file.

After doing the above, restart NinjaTrader and then you should have access.

[koganam]

Hello

I have built my own dll with matlab (.Net assembly) and would like to add it to NT.

I registered this dll in GAC by creating a strong name and copying it to C:\WINDOWS\assembly. MWArray is also registered in GAC.

Now I want to call this dll from strategy. I think I need to add this line before I can use my dll:

using mylib.dll;

I did this but when I compile the code, I get this "namespace is not found, are you missing a using directive or assembly reference".

Do I have to add my custom dll somewhere in NT, do I have to specify the path somehow, why GAC assemblies are not accessible from NT?

Please suggest at least starting point for fixing this problem.

Thank you,
Sergey.

Did you put your classes into a named namespace?

If so, then you need a using directive for that namespace.

After that, add a reference for your dll by right-clicking in any indicator/strategy, and using the context menu.

[VTtrader]

Sergey,

Did MatLab create an MWArray.dll file for you, and then another file xxx.dll file?

Both of those need to be placed in the NT custom folder as mentioned and then references set for them.

In addition, accessing MatLab, I had to include the using statements (like koganam mentioned) as follows:

using MathWorks.MATLAB.NET.Arrays;
using MathWorks.MATLAB.NET.Utility;
using MathWorks.MATLAB.NET.ComponentData;
using WhateverYouCalledYourAssembly;

Hope this helps.
VT

http://integratedtradingtech.com

[sergeysamsonov]

Thank you for reply. 50% of the problem is solved. I added a custom made dll to references and then added "using mylib.dll" and it compiled. MWArray.dll was not created but I found it in C:\Program Files\MATLAB\R2010a\toolbox\dotnetbuilder\bin\win3 2\v2.0\. I copied it to custom folder and added to references and then added three "using MathWorks. " statements, when I compile I get an error: Metadata file 'c:\Documents and Settings\...\My Documents\NinjaTrader 7\bin\Custom\MWArray.dll' could not be opened -- 'Error importing module 'ManagedCPPAPI.netmodule' of assembly 'c:\Documents and Settings\...\My Documents\NinjaTrader 7\bin\Custom\MWArray.dll' -- The system cannot find the file specified.

If you do not mind can you please give me an example how to declare and call matlab function declared in my library?

Thank you,
Sergey.

[VTtrader]

Sergey,

Here's what I did to the best of my memory (I have since changed OSs to W7), if this doesn't help I can boot into my old XP install and check further. Some are duplicates from previous post.

I have placed the MWArray.dll in my NT\custom folder, I also have the "<MyMatlabLibrary>.dll" file that MatLab created in that same NT\Custom folder.

References are set for both using the NT editor.

In the indicator/s that calls (uses) the MyMatlabLibrary.dll, I have the following "using" declarations:
using MathWorks.MATLAB.NET.Arrays;
using MathWorks.MATLAB.NET.Utility;
using MathWorks.MATLAB.NET.ComponentData;
using <MyMatlabLibrary>;

Then also within the indicator in OnBarUpdate() I have this:

 
MWNumericArray data= new MWNumericArray( MWArrayComplexity.Real, MWNumericType.Double, length);
for (int idx= 1; idx <= length; idx++)
{
    data[idx]= Close[length - idx];
}

Then:
MWArray[] argsOut = <Call your library method here>;
edit: MWNumericArray "data" from above is passed into the method call.

and finally:
Output.Set((double)(MWNumericArray)argsOut[X][X]);

That is the basic format I used anyway.

Hope it helps.
VT

http://integratedtradingtech.com

[sergeysamsonov]

Thank you VT! I solved this problem by removing MWArray from custom folder and referencing original MWArray located in Matlab folder.

Sergey.