Reading parameter values

[Stephan123]

Hi,

I need to read the parameter settings of the running strategy from within
the script in a way that can be used in a general sub function / method.
Therefore directly adressing the variables doesn't work.

From within the strategy I tried the following but it didn't work:

this.Parameters[index].Value.ToString()

using

this.Parameters[index].Name

gives at least the name of the parameter(s).

What must be used here to get the values?

Thanks in advance, Stephan

[NinjaTrader_Austin]

Stephan123, are the general subfunctions/methods in the same strategy file? Can you please clarify exactly what you're trying to do here?

[Stephan123]

Hallo,

the subfunction is called within OnTermination() of the strategy which I want to get the parameter values from.

It looks like this:

-Calling the subfuntion:

PerformanceToFile(@"path",Performance);

The function itself is defined within userdefined methods:

public void PerformanceToFile(string path, SystemPerformance Performance)
{
//Here I need to read the set parameter values into some array.
}

All I need to know is how to access the parameter values in a general way
that works for every strategy where this subfunction is called from.

[NinjaTrader_Austin]

Stephan123, I will have someone get back to you tomorrow.

[koganam]

Hallo,

the subfunction is called within OnTermination() of the strategy which I want to get the parameter values from.

It looks like this:

-Calling the subfuntion:

PerformanceToFile(@"path",Performance);

The function itself is defined within userdefined methods:

public void PerformanceToFile(string path, SystemPerformance Performance)
{
//Here I need to read the set parameter values into some array.
}

All I need to know is how to access the parameter values in a general way
that works for every strategy where this subfunction is called from.

You simply call the parameter values by using their public exposed name.

[Stephan123]

You simply call the parameter values by using their public exposed name.

Due to the above mentioned reasons I can't do it like
name_of_thestrategy.name_of_the_public_property

This is not a general solution which is applicable to any strategy.
I look for something like
int i = this.parameters.Count
value = this.parameters[0 to i-1].value

[koganam]

Due to the above mentioned reasons I can't do it like
name_of_thestrategy.name_of_the_public_property

This is not a general solution which is applicable to any strategy.
I look for something like
int i = this.parameters.Count
value = this.parameters[0 to i-1].value

I guess that I am confused then.

What parameter values are you trying to read and access? Those of the strategy?
Are you trying to read these values using the function in UserDefinedMethods.cs?

[Stephan123]

I guess that I am confused then.

What parameter values are you trying to read and access? Those of the strategy?
Are you trying to read these values using the function in UserDefinedMethods.cs?

Both questions: yes
The function in UserDefinedMethods must be applicable to every strategy
without changing the code within the function.

[koganam]

Both questions: yes
The function in UserDefinedMethods must be applicable to every strategy
without changing the code within the function.

In that case, your situation is that you have a Class that is calling a function from another Class/Partial Class. The called function will not be able to have within its body the parameters of the calling class, as those are unknown to the function before it is called, so they cannot be in it.

Moreover, the parameters of the strategy are not a collection, so you are not going to be able to access those parameters in the manner that you seem to be describing.

However, as you can pass any parameter to the function if you choose to define it as such, one method is to define your function to take an ArrayList as one of its parameters. In that case, when you call it, you will pass it an ArrayList declared in your strategy. In the body of the function, you can then manipulate your ArrayList as you see fit. You could for example, populate the ArrayList with all the parameters, then access those parameters from the ArrayList, either within the function, or outside it, anywhere within the scope of the ArrayList declaration.

[Stephan123]

In that case, your situation is that you have a Class that is calling a function from another Class/Partial Class. The called function will not be able to have within its body the parameters of the calling class, as those are unknown to the function before it is called, so they cannot be in it.

The calling class is the particular strategy.
The called function is defined within partial class Strategy.
When I use the expression this. within the function
I get the reference to the strategy class from where the function is called.
Therefor I should be able to access any strategy properties.

As mentioned above it already works for the parameter names using this.Parameters[index].Name

Just the values don't work yet.
Of course I could directly pass the parameters as inputs to the function.
But I'd rather avoid it since it means addition al individual coding within every strategy.

[koganam]

The calling class is the particular strategy.
The called function is defined within partial class Strategy.
When I use the expression this. within the function
I get the reference to the strategy class from where the function is called.
Therefor I should be able to access any strategy properties.

As mentioned above it already works for the parameter names using this.Parameters[index].Name

Just the values don't work yet.
Of course I could directly pass the parameters as inputs to the function.
But I'd rather avoid it since it means addition al individual coding within every strategy.

The called function cannot know from where it will be called. Therefore, it cannot possibly access directly anything that belongs to the calling class.