Insert function into event at runtime

bonzaiholding

Hi, If i have a lot of function there is an easy way to insert them by runtime and not by code? For example instead of this:

public class A
{

    MyEvent m\_Event;
    List<MyEvent> m\_EventList;

    public bool Func\_1(int num) { MessageBox.Show("1"); return num > 1 ? true : false; }
    public bool Func\_2(int num) { MessageBox.Show("2"); return num > 2 ? true : false; }
    public bool Func\_3(int num) { MessageBox.Show("3"); return num > 3 ? true : false; }
    public bool Func\_4(int num) { return num > 4 ? true : false; }
    public bool Func\_5(int num) { return num > 5 ? true : false; }
    public bool Func\_6(int num) { return num > 6 ? true : false; }
    public bool Func\_7(int num) { return num > 7 ? true : false; }
    public bool Func\_8(int num) { return num > 8 ? true : false; }

    public A()
    {
                               
        this.m\_Event += new MyEvent(Func\_1);
        this.m\_Event += new MyEvent(Func\_2);
        this.m\_Event += new MyEvent(Func\_3);
        this.m\_Event += new MyEvent(Func\_4);
        this.m\_Event += new MyEvent(Func\_5);
        this.m\_Event += new MyEvent(Func\_6);
        this.m\_Event += new MyEvent(Func\_7);
        this.m\_Event += new MyEvent(Func\_8);          
    }
}

I want this code to look like this:

public class A
{

    MyEvent m\_Event;
    List&lt;MyEvent&gt; m\_EventList;

    public bool Func\_1(int num) { MessageBox.Show("1"); return num &gt; 1 ? true : false; }
    public bool Func\_2(int num) { MessageBox.Show("2"); return num &gt; 2 ? true : false; }
    public bool Func\_3(int num) { MessageBox.Show("3"); return num &gt; 3 ? true : false; }
    public bool Func\_4(int num) { return num &gt; 4 ? true : false; }
    public bool Func\_5(int num) { return num &gt; 5 ? true : false; }
    public bool Func\_6(int num) { return num &gt; 6 ? true : false; }
    public bool Func\_7(int num) { return num &gt; 7 ? true : false; }
    public bool Func\_8(int num) { return num &gt; 8 ? true : false; }

    public A()
    {
                               
        for(int i=1;i<=8;i++)
         this.m\_Event += new MyEvent(Func\_ + i.ToString());

    }
}

is there some way to do something like this?

0x3c0

Yes. You can use System.Reflection and Delegate.CreateDelegate to help. The basic sequence of events is:

Get the class' Type
Get the EventInfo representing m_Event of that Type
Iterate from one to eight
Get the method "Func_" + i.ToString()
Use Delegate.CreateDelegate(typeof(MyEvent), [MethodInfo you just retrieved in the last step])
Store the return value of that function call in a variable
Call the AddEventHandler(this, [Delegate you just created and stored in a variable])

That's the basic sequence of events. If you wanted something simpler, but less modular, you could just create a List<MyEvent> and store the functions in there. Then just iterate and add the handler like you normally do.

Between the motion And the act Falls the Shadow

bonzaiholding

Thanks for your help , it's works :-\

mustang86

Cool. I'm glad that you found a solution! I would have used a (yuck) macro. But, from what I could find, C# doesn't support macros. huh? However, I did find the following: A Macro Preprocessor in C# _____________ Joe

PIEBALDconsult

I just use the C-preprocesor. :rolleyes:

mustang86

I agree, cpp rules! :) http://gcc.gnu.org/onlinedocs/cpp/[^] http://gcc.gnu.org/onlinedocs/gcc-2.95.3/cpp_1.html#SEC1[^] In grad school, the assembler that I did (written in C) could do macros. How? By first running the assembler source code through cpp. :cool: Plus, the manual for cpp was already written. Double win! :) Heck, the smart engineer doesn't reinvent the wheel when it's just sitting there next to him/her! :) ___ Joe