C# passing values from one method to another

Question

I am getting an error code in the result. code below. I am basically trying to get a data set from SingleColumn method and use it in SMA method. Bu

Answer 1

You should use static variable.

private static IEnumerable<double> result;

and then in method SingleColumn asign columnQuery.ToList() to this variable

Answer 2

Each variable in C# is exists within a scope which is defined by curly braces. In your case the variable result is within the scope SingleCloumn.

public static void SingleColumn(IEnumerable<string> strs, int highNum)
{

}

To use result in another scope, you can make "result" as a global variable. As I can see you have commented out

//static public double results; 

first un-comment it and remove var from

var results = columnQuery.ToList();

Hope this helps.

Answer 3

You have some options:

1. have SingleColumn return results and add that as a parameter to SMA
2. make results a field of the class so it is shared.

Option 1. is cleaner since it forces callers to call SingleColumn first (or come up with a list on their own)

    static public double[] SingleColumn(IEnumerable<string> strs, int highNum)
    {
        ...
        return closePrice;
    }

        #region Strategy Code SMA
    static public void SMA(double[] closePrice)
    {
        int TOTAL_PERIODS = closePrice.Length;
        double[] output = new double[TOTAL_PERIODS];
        ...
    }   

Note that I changed your output/input from result to closePrice since it was just converting it to a List and back. It's cleaner just to leave it as a double[]. You can also clean up the code a bit by just using ToArray instead of using ToList and then ToArray.