CODEWITHSUNDEEP
c#methods
Oystein
Oystein

Reputation: 1322

Adding a method call to a collection

Given a situation where I have a method SetFooInDevice(), which I call using a property as one of the arguments:

public class Program
{
    public static byte Foo { get; set; }

    public static void SetFooInDevice(System.IO.Ports.SerialPort sp, byte foo) 
    {
        var txBuffer = new List<byte>();
        // Format message according to communication protocol
        txBuffer.Add(foo);
        sp.Write(txBuffer.ToArray(), 0, txBuffer.Count);
    }

    public static void Main()
    {
        var _rnd = new Random();
        var _serialPort = new System.IO.Ports.SerialPort("COM1", 9600);
        _serialPort.Open();
        for (int i = 0; i < 100; i++)
        {
            Foo = (byte)_rnd.Next(0, 255);
            SetFooInDevice(_serialPort, Foo);  // <-- How to add this call to a collection?
            System.Threading.Thread.Sleep(100);
        }
    }
}

Is it possible to add the method call to a collection, in a way that the method call can be executed when running through the collection at a later time?

I want to be able to add calls to various methods to a collection, that I can run through and execute later if conditions are met (serial port open, time interval has passed, etc.).

Upvotes: 1

Views: 71

Answers (2)

Oleksii Klipilin
Oleksii Klipilin

Reputation: 1936

Try this:

public static byte Foo { get; set; }

public static void SetFooInDevice(System.IO.Ports.SerialPort sp, byte foo)
{
    var txBuffer = new List<byte>();
    // Format message according to communication protocol
    txBuffer.Add(foo);
    sp.Write(txBuffer.ToArray(), 0, txBuffer.Count);
}

public static void Main()
{
    List<Action> listActions = new List<Action>(); // here you create list of action you need to execute later
    var _rnd = new Random();
    var _serialPort = new System.IO.Ports.SerialPort("COM1", 9600);
    _serialPort.Open();
    for (int i = 0; i < 100; i++)
    {
        Foo = (byte)_rnd.Next(0, 255);
        var tmpFoo = Foo; // wee need to create local variable, this is important
        listActions.Add(() => SetFooInDevice(_serialPort, tmpFoo));
        System.Threading.Thread.Sleep(100);
    }

    foreach (var item in listActions)
    {
        item(); // here you can execute action you added to collection
    }
}

You can check this on MS docs Using Variance for Func and Action Generic Delegates

Upvotes: 2

Rahul
Rahul

Reputation: 77896

You can use Action delegate for this purpose like below

    private List<Action<System.IO.Ports.SerialPort, byte>> methodCalls
        = new List<Action<System.IO.Ports.SerialPort, byte>>();

Upvotes: 0

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