how can i use delegate to output several param in multi-thread?

smallkubi

My sample as follows: Now i use Func<> can output 1 param, but i need 3 param output, how can i do it? Func call = y => fun(y, z); //i need output o1,o2, like y=>fun(y,z,out o1,out o2) ? ThreadStart start = () => fun1(x, call); Thread th = new Thread(start);

OriginalGriff

Use a lambda:

    private void DoThread(int i, out int j, out int k)
        {
        j = i \* 2;
        k = i \* 3;
        }
        ...
        int x = -1;
        int y = -1;
        Thread start = new Thread(() => DoThread(6, out x, out y));
        start.Start();
        Thread.Sleep(1000);
        Console.WriteLine("{0},{1}", x, y);

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

smallkubi

oh, DoThread function i want to transfer to Thread as a var, your sample is call immidiately. ThreadO th_o = new ThreadO(x => c( x, n,out F)); //this is Func<>,but i also want to out F Thread th = new Thread(new ThreadStart(th_o.Cons_Mult)); th.Start(); private double c(double x,double n,out double F) { } class ThreadO { public ThreadO(Func fun1) { ... } }

Lost User

If you can handle one parameter, you can handle multiple; encapsulate all three items in a class, and set an instance of that new class as your parameter.

class MyClass
{
public string o1;
public object o2;
public int y { get; set; }
public int z { get; set; }
}

:)

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^][](X-Clacks-Overhead: GNU Terry Pratchett)

smallkubi

Yes,haha, you are right, but i want my code simplex and efficient, so i hope no more class, only several variable can solve it. Func<> can output one param, but i want more output param. ,i don't know how to do it. how can i use delegate to define multi-output delegate ?

BillWoodruff

I think what you want here is a way to "compose" a Func that you can use later

// sample Struct, but you could use a Class also
public struct TestStruct
{
int X;
int Y;

public TestStruct(int x, int y)
{
    X = x;
    Y = y;
}

}

// define the Func
private Func TestFunc = (x, y) =>
{
return new TestStruct(x * 4, y * 5);
};

private TestStruct testStruct1;

// test in some method
testStruct1 = TestFunc(100, 200);

«Tell me and I forget. Teach me and I remember. Involve me and I learn.» Benjamin Franklin

Lost User

smallkubi wrote:

i want my code simplex and efficient, so i hope no more class

How would boxing the result be ineffcient? And no, that was not complex.

smallkubi wrote:

how can i use delegate to define multi-output delegate ?

You can return an struct or object, you can use out parameters. Or even a callback that gets called for each output-variable :)

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^][](X-Clacks-Overhead: GNU Terry Pratchett)