The non-generic type 'System.ValueTuple' cannot be used with type arguments

[davydhnz]

I have this problem.

public class MyIndicator: Indicator {

​ // Declare a public field for the ValueTuple
private ValueTuple<
double, double, TimeSpan, TimeSpan,
double, double, TimeSpan, TimeSpan,
double, double, TimeSpan, TimeSpan,
double, double, TimeSpan, TimeSpan,
TimeSpan, TimeSpan, TimeSpan, TimeSpan> MyTuple;
​

when trying to use that, I get the error:

The non-generic type 'System.ValueTuple' cannot be used with type arguments

I want to declare all those doubles and TimeSpans before the scope of OnBarUpdate.
Then just set them in OnBarUpdate with:

MyTuple = new ValueTuple< double, double, TimeSpan, TimeSpan, double, double, TimeSpan, TimeSpan, double, double, TimeSpan, TimeSpan, double, double, TimeSpan, TimeSpan, TimeSpan, TimeSpan, TimeSpan, TimeSpan>(
0.5, 0.5, new TimeSpan(1, 15, 0), new TimeSpan(0, 30, 0),
0.8, 0.4, new TimeSpan(2, 30, 0), new TimeSpan(7, 45, 0),
1.0, 1.1, new TimeSpan(1, 0, 0), new TimeSpan(3, 15, 0),
6.3, 7.4, new TimeSpan(7, 15, 0), new TimeSpan(2, 30, 0),
new TimeSpan(1, 45, 0), new TimeSpan(1, 0, 0),
new TimeSpan(0, 15, 0), new TimeSpan(0, 30, 0) );​

What am I doing wrong?

Thank you very much ahead of time!

[NinjaTrader_ChelseaB]

Hello davydhnz,

NinjaTrader uses C# 5 which does not have tuples.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/97575-sample-scripts#post786040

[davydhnz]

NinjaTrader_ChelseaB,

I've used them before in Ninja successfully with dictionaries like:

Dictionary<DateTime, Tuple<string, string, double>> myStopDictionary = new Dictionary<DateTime, Tuple<string, string, double>>();

I was just looking for a way to set multiple doubles and timespans so that I can write the values without naming them, because I have some very repeative code, and this will make the code far more concise and less bloaty. Like 1, 6, new TimeSpan(1, 15, 0), instead of double nameone 1, double nametwo, 6, TimeSpan namethree == new TimeSpan(1, 15, 0)

I'm just looking for a way to do it outside of a Dictionary.

Thanks again.

[NinjaTrader_ChelseaB]

Hello davydhnz,

Unfortunately, I would not be able to provide further information, as my understanding is that tuples require c# 7 or higher.

This thread will remain open for any community members that can provide better information.

[davydhnz]

NinjaTrader_ChelseaB,

no worries. I worked it out in the end,
but you have been so helpful to me numerous times on this forum. Have a lovely day!

[user10]

try:

var data = Tuple.Create("EURUSD", 1.12345, DateTime.Now);
string symbol = data.Item1;
double price = data.Item2;
DateTime timestamp = data.Item3;
Print("String " + symbol + " Value " + price + " Time " + timestamp);