Hey NinjaTrader team, I have a strategy where I want to dynamically instantiate indicators in State.Configure (kinda like AI Generate). I am able to create a instance but each indicator has it's own unique constructor and I want to dynamically generate it. In this example I want to instantiate ADX(12) then say for the next iteration I want to instantiate SMA(14) Below is my code :
Code:
public class AIStrategyGenerator : Strategy
{[INDENT]//Array of indicators I want to try
private Indicator[] indicators;
protected override void OnStateChange()
{[/INDENT][INDENT=2]if (State == State.Configure)
{[/INDENT][INDENT=3]int iter = 1;
//Get all indicators from the Indicators Class
var indicator_type = typeof (Indicator);
var sub_indicator_types =
indicator_type
.Assembly
.DefinedTypes
.Where(x => indicator_type.IsAssignableFrom(x) && x != indicator_type)
.ToList();
Type t = Type.GetType("NinjaTrader.NinjaScript.Indicators.Indicator");
//Iterate of each indicator and instantiate into the strategy
while (iter < iterations) {[/INDENT][INDENT=4]try {
//Create the instance
Indicator sub_indicator = (Indicator)Activator.CreateInstance(sub_indicator_ types[iter]);
// split the indicator parameter string to name and param list eg iName="ADX" and iParams="12,34"
//get all methods with the corresponding indicator name, using the least number of params
MethodInfo meth = t.GetMethods(BindingFlags.Public|BindingFlags.Inst ance|BindingFlags.DeclaredOnly)
.Where(x=>x.Name==sub_indicator.Name)
.OrderBy(x=> x.GetParameters().Length)
.First();
[B][SIZE=16px]//call method. This is equivalent to indy=ADX(12); ERROR HERE Error Message : Object does not match target type using C# Reflection
sub_indicator = (Indicator)meth.Invoke(this,GetParams("12",meth.GetParameters()));[/SIZE][/B]
Print(sub_indicator);
indicators[iter] = sub_indicator;
} catch (Exception e) {
Print(e.Message);
}
iter++;[/INDENT][INDENT=2]}[/INDENT][INDENT]
//convert comma separated string of parameters to array of objects using method parameter types
object[] GetParams(string input,ParameterInfo[] pi)
{
string[] parameters=input.Split(',');
Object[] obj=new Object[parameters.Length];
// convert each string to the correct param type
for(int i=0;i<parameters.Length;i++)
obj[i]=Convert.ChangeType(parameters[i],pi[i].ParameterType,CultureInfo.InvariantCulture.Number Format);
return obj;
}
[/INDENT]
}
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