Can't add .dll reference to my cBot

Spotware
19 Jan 2016, 13:45

Dear Trader,

Have you performed the exact steps described in the Referencing a dll section of our API Guides? 

stasiek.abyszkin
19 Jan 2016, 16:52

Hi,

Yes I have. I already solved the problem, I was referencing the wrong library through the Reference Manager.

Sorry for troubling you.

Many thanks

gutygs
25 Jul 2019, 17:25

Hello!

I am having the same problem yet I can't find a way to fix it.

I'm trying to reference the NumSharp library in my code. To do that, I downloaded the package via NuGet on VisualStudio and I followed the steps on the link to point to the downloaded .dll

The program seems to compile just fine when I use the statement 

using NumSharp;

nonetheless, when I try to use any of the many classes from the package, I get a compilation error. For instance, when trying to use 

var nd = np.arange(12);

which is a statement that's perfectly fine on VisualStudio when using Numsharp, in cTrader I get several errors point that System.object .ICloneable .Collections.IList etc are defined on an assembly that is not referenced, and that I must add a reference to assembly netstandard.

I know this is probably not the correct way to get the Library, but there's no other way, and since I can't interact with Visual Studio, I am left with no other choice but to point to the library like this.

Is there any way to work around this?

Thank you very much!

PanagiotisCharalampous
25 Jul 2019, 17:27

Hi gutygs,

Can you please post a link to the NuGet package and the cBot code you are using?

Best Regards,

Panagiotis

gutygs
25 Jul 2019, 18:36

Sure thing!

This is the package I'm trying to install:

https://www.nuget.org/packages/NumSharp/

And this is the code that I'm trying to build:

using System;
using System.Linq;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;
using NumSharp;


namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class Strategy5 : Robot
    {
        [Parameter("iCandle", DefaultValue = 7)]
        public int iCandle { get; set; }

        protected override void OnStart()
        {

            Print("initializing console");

        }

        protected override void OnBar()
        {

            //lets print the last 7 candle closes
            Print("Printing the last 7 candles");
            var lastIndex = MarketSeries.Close.Count - 2;
            //start from -2 because -1 corresponds to current candle price
            Print(lastIndex);

            //Define the dataseries arrays
            double[] closePrices = new double[iCandle];
            double[] openPrices = new double[iCandle];
            double[] highPrices = new double[iCandle];
            double[] lowPrices = new double[iCandle];

            //Fill the dataseries arrays with data
            for (int i = 0; i < iCandle; i++)
            {
                double close = MarketSeries.Close[lastIndex - i];
                double open = MarketSeries.Open[lastIndex - i];
                double high = MarketSeries.High[lastIndex - i];
                double low = MarketSeries.Low[lastIndex - i];

                closePrices[iCandle - 1 - i] = close;
                openPrices[iCandle - 1 - i] = open;
                highPrices[iCandle - 1 - i] = high;
                lowPrices[iCandle - 1 - i] = low;
            }

            var nd = np.arange(12); //error on this line



        }

        protected override void OnStop()
        {
            // Put your deinitialization logic here
        }
    }
}

I installed the package in another project in Visual Studio by using the NuGet command line via 

PM> Install-Package NumSharp

and pointed back on cTrader, pointed to the dll as showin in the tutorial here: https://ctrader.com/api/guides/referencing_dll

The reason I want to install this package is because I need to perform matrix operations with tensors, and back when using python, I mainly used Numpy.

Thanks for the help!!

PanagiotisCharalampous
26 Jul 2019, 09:28

Hi gutygs,

The reason is that this package is built using a .Net framework version higher than 4.0. At the moment the supported framework for cTrader Automate is v4.0.

Best Regards,

Panagiotis