User regex in Positions.Find

PanagiotisCharalampous
31 Oct 2018, 14:49

Hi irmscher9,

You cannot use regex in Find() method. However, you could consider Linq. See below

            var rx = new Regex("your regular expression", RegexOptions.IgnoreCase);

            var selected = from position in Positions
                           where rx.IsMatch(position.Label)
                           select position;

Best Regards,

Panagiotis

irmscher9
31 Oct 2018, 15:17

Thanks for prompt reply Panagiotis! :)

irmscher9
31 Oct 2018, 15:43

OK, I'm not a c# pro unfortunately..

So how do I print out the found position label then? Print(position) doesnt work and Print(selected) is prints out some gibberish:

using System;
using System.Linq;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;
using System.Text.RegularExpressions;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class NewcBot : Robot
    {
        [Parameter(DefaultValue = 0.0)]
        public double Parameter { get; set; }



        protected override void OnStart()
        {
            ExecuteMarketOrder(TradeType.Buy, Symbol, 1, "Buy", 400, 600);
        }

        protected override void OnTick()
        {
            var rx = new Regex("\\w+", RegexOptions.IgnoreCase);

            var selected = from position in Positions
                where rx.IsMatch(position.Label)
                select position;

            Print(selected);
        }


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

PanagiotisCharalampous
31 Oct 2018, 16:07

Hi 

selected is a collection of positions matching your regular expression, first you need to get an item from there and then print the label. See below

using System;
using System.Linq;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;
using System.Text.RegularExpressions;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class NewcBot : Robot
    {
        [Parameter(DefaultValue = 0.0)]
        public double Parameter { get; set; }



        protected override void OnStart()
        {
            ExecuteMarketOrder(TradeType.Buy, Symbol, 1, "Buy", 400, 600);
        }

        protected override void OnTick()
        {
            var rx = new Regex("\\w+", RegexOptions.IgnoreCase);

            var selected = from position in Positions
                           where rx.IsMatch(position.Label)
                           select position;

            Print(selected.First().Label);
        }


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

Best Regards,

Panagiotis

irmscher9
31 Oct 2018, 16:44

Thanks Panagiotis, you are a star!

And for those of you who is reading this, it's better to use ".FirstOrDefault()" instead of ".First()" if you want to avoid the excerption.