C# -delegate array - how to add tostring methods

Question

Is it possible to add ToString methods to an array of delegates?? If so how?? here is the code I have written:

public delegate string Task();

        public static void Main(string[] args)
    {
        ArrayList studentArray = new ArrayList();
        Course italianCook = new ItalianCookCourse { Teacher = "Ben Hodd" };
        Course seafoodCook = new SeafoodCookCourse { Teacher = "Harry Cotter"};
        Course sewingCourse = new SewingCourse
        {
            Teacher = "Margaret Mair",
            ChargePerStudent = scFee,
            CostPerStudent = 100.00m,
        };
        Course creativeWrite = new CreativeWritCourse { Teacher = "Mary Smith };
        Course businessWrite = new BusinessWritCourse { Teacher = "Mary Smith" };
        Task[] tasks = new Task(italianCook.ToString, seafoodCook.ToString, sewingCourse.ToString);

The error message is "string Class.ToString()" - "Method name expected"

As the tostring method handle as a string, is it possible to add it to delagate??

Are those two methods you're trying to pass at the same time? That's not quite how you instantiate a single Task object or add items to a Task[] array... — BoltClock
– BoltClock, Commented Jul 3, 2011 at 1:15

dlev · Accepted Answer · 2011-07-03 01:16:16Z

1

Assuming you fixed up the syntax, the solution would be to remove the ()'s from the end of the ToString's. To create a delegate based on a method, you only need to give its name.

Task[] tasks = new Task[] { Class1.ToString, Class2.ToString }

Note that the above code does not actually compile. ToString() is not a static method, so you need to pass in an object reference along with the function name:

object o = new object();
Task[] tasks = new Task[] { o.ToString };

answered Jul 3, 2011 at 1:16

dlev

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3 Comments

Julesyw Over a year ago

Thanks - I did try that and got another message "(paramater) Course italianCook" "Method name expected"....??

Julesyw Over a year ago

Hi - italianCook is an instance of class Course and an object - as above it still does not work??

dlev Over a year ago

What does your code look like now? As BoltClock mentioned, your current syntax is incorrect.

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