can delegate return multiple values with different datatypes

[suni_dotnet]

hi, iam using delegates... where iam calling delegate from methods(3 methods and returns single value) and the values set by these methods are used in another method. Now i need to retun 2 values from delegate with two different datatypes... i used object[] datatype, but unable to retrieve multiple values.. if is possible with what datatype delegate should be declared and how the values can be set and retrieved.. thanks in advance

[Rutvik Dave]

For that you need to create a Class with 2 Data Members with appropriate data type. and in the delegate create a object of that class and set both the variable some values and return the Object. i.e. you can also use property instead of public variables used in this example.

Class C
{
public int i;
public string s;
}

private C Method1()
{
C c1 = new C();

c1.i = 10;
c1.s = "test";

return c1;

}

[Lost User]

You can create a new class, encapsulating both values and return that. Or read up on the out-parameter.

I are troll :)

[Ben Fair]

Well it should work using object[] return value from the delegate, but you may need to cast to the proper type. If your delegate it returning object, but it's actually an object[] that's been boxed, just cast the returned object to object[] like so:

public delegate object ExecuteDelegate(int i, string s);
...
object[] values = (object[])ExecuteDelegate(int i, string s);

In this case you just unbox the object[] from the return value into the propery type. Or, if your delegate is returning object[] they should be accessible right away:

public delegate object[] ExecuteDelegate(int i, string s);
...
object[] values = ExecuteDelegate(int i, string s);

It is sometimes helpful to create a class (as others have suggested) to represent the delegate's result values that have meaningful property names, etc., but it really depends on your situation. I'd say if the result data is complex or the delegate is used in multiple places to create a class for it; otherwise, just stick with object[].

Keep It Simple Stupid! (KISS)

[Jon Rista]

You can use the out parameter modifier:

void MyCallback(int input, out string output1, out int output2);