RE: help with array of functions
- From: Arthur M. <ArthurM@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 6 Jun 2005 11:20:03 -0700
If you are attempting to use different functions withint he same array then:
1) Declare delegate types
2) declare array of delegate[] type - use: (Delegate[] abc = new
Delegate[n];) not to be confused with (delegate[] abc = new Delegate[n];)
3) i
delegate void testdelegate(int param);
class tclass
{
public void testfunction(int p)
{
}
}
Delegate[] abc = new Delegate[10];
for (int op_counter = 0; op_counter < abc.Length; op_counter++)
{
if (abc[op_counter] == null) continue;
// if you know the delegate type then just use a cast
((testdelegate)abc[op_counter])(0);
// if you dont know the type, then ether query or call
invoke and catch an error
abc[op_counter].DynamicInvoke(new object[] { op_counter });
// validate delegate is actually pointing to the method you
think it should be poiting to
// use reflection for that - which parameters you are
comparing is up to you
//(typeof(tclass).GetMethod("testfunctionname");
// abc[op_counter].Method <-- will give you method info just
as above
}
be careful with exceptions. Also remember, that dynamic invoke is quite slow
comparing to statically defined types. Remmeber that dynamicinvoke takes
object[] as a paramter, therefore any integer values will get boxed/unboxed
(read in - performance issues).
On a bright note, if implemented properly it works very well. I have
implemented expression parser this way...
- Arthur
"CobraStrikes@xxxxxx" wrote:
> Hi All,
>
> How can I create an array of functionsand how would I call them
>
> many thanks
>
>
>
.
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