Question

I’m basically trying to pass a method to another class to be called later, but can’t quite figure this out in C# (I’m still too used to Objective-C).

public class Class1{

    private void btn_click(object sender, EventArgs e)
    {
        ServerRequest sr = new ServerRequest();
        sr.DoRequest("myrequest", myCallback);
    }

    public void myCallback(string str)
    {
    }
}

Then later on I want my ServerRequest class to basically fire the callback function, is this not possible? (I’m basically phoning home to a server for a login response to my software)

I haven’t been able to find a way to do this with delegates, continuously get errors. Here is the other class:

public class ServerRequest
{
    public void DoRequest(string request, Delegate callback)
    {
        // do stuff....
        callback("asdf");
    }
}

Is this possible in #? In Objective-C this would be simple and I would just do something like

[myObject performSelector(@selector(MyFunctionName)) withObjects:nil];

Answer 1

You can pass it as Action<string> – which means it is a method with a single parameter of type string that doesn’t return anything (void) :

public void DoRequest(string request, Action<string> callback)
{
    // do stuff....
    callback("asdf");
}