How does one go about getting a pointer to method as an IntPtr?
Example:
public class A
{
public void X()
{
Y(Z);
}
public void Y(IntPtr z)
{
}
public void Z()
{
}
}
This won't compile, because the compiler thinks I meant Y(Z()).
I'm guessing this must be possible, because classes inheriting from
System.EventHan dler have ctors which takes a parameter called 'method',
whose type is IntPtr.
Cheers,
Rik 5 13463
Hi....
You would use a delegate.
John
"Rik Hemsley" <ri*@rikkus.inf o> wrote in message
news:ek******** ******@TK2MSFTN GP12.phx.gbl... How does one go about getting a pointer to method as an IntPtr?
Example:
public class A { public void X() { Y(Z); }
public void Y(IntPtr z) { }
public void Z() { } }
This won't compile, because the compiler thinks I meant Y(Z()).
I'm guessing this must be possible, because classes inheriting from System.EventHan dler have ctors which takes a parameter called 'method', whose type is IntPtr.
Cheers, Rik
What you want is a delegate. There are no pointers, per se. Nothing you
could use from unmanaged code.
Here's a description with samples: http://www.akadia.com/services/dotne...nd_events.html
Pete
"Rik Hemsley" <ri*@rikkus.inf o> wrote in message
news:ek******** ******@TK2MSFTN GP12.phx.gbl... How does one go about getting a pointer to method as an IntPtr?
Example:
public class A { public void X() { Y(Z); }
public void Y(IntPtr z) { }
public void Z() { } }
This won't compile, because the compiler thinks I meant Y(Z()).
I'm guessing this must be possible, because classes inheriting from System.EventHan dler have ctors which takes a parameter called 'method', whose type is IntPtr.
Cheers, Rik
Pete Davis wrote: What you want is a delegate.
See the ctor for System.Timers.E lapsedEventHand ler.
I'm trying to instantiate that class (and any other EventHandler-derived
class) using ConstructorInfo .Invoke.
I am writing a unit test framework which allows testing of async code,
so tricky things like this are necessary.
There are no pointers, per se. Nothing you could use from unmanaged code.
I'm using managed code only.
Quoting myself:
I'm guessing this must be possible, because classes inheriting from
System.EventHan dler have ctors which takes a parameter called 'method',
whose type is IntPtr.
EventHandler-derived classes must be instantiated somehow. I just need
to know how!
Cheers,
Rik
Rik,
When creating delegates dynamically, you don't call the Invoke method on
the ConstructorInfo instance. Rather, you call the appropriate static
CreateDelegate method overload, which will take the Type information for the
delegate, the method info which you want to attach to, the instance, etc,
etc.
Once you have that, you can dynamically invoke your delegate calling the
DynamicInvoke method on the instance of the delegate.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Rik Hemsley" <ri*@rikkus.inf o> wrote in message
news:Ou******** ******@TK2MSFTN GP09.phx.gbl... Pete Davis wrote: What you want is a delegate.
See the ctor for System.Timers.E lapsedEventHand ler.
I'm trying to instantiate that class (and any other EventHandler-derived class) using ConstructorInfo .Invoke.
I am writing a unit test framework which allows testing of async code, so tricky things like this are necessary.
There are no pointers, per se. Nothing you could use from unmanaged code.
I'm using managed code only.
Quoting myself:
I'm guessing this must be possible, because classes inheriting from System.EventHan dler have ctors which takes a parameter called 'method', whose type is IntPtr.
EventHandler-derived classes must be instantiated somehow. I just need to know how!
Cheers, Rik
Nicholas Paldino [.NET/C# MVP] wrote: Rik,
When creating delegates dynamically, you don't call the Invoke method on the ConstructorInfo instance. Rather, you call the appropriate static CreateDelegate method overload, which will take the Type information for the delegate, the method info which you want to attach to, the instance, etc, etc.
Once you have that, you can dynamically invoke your delegate calling the DynamicInvoke method on the instance of the delegate.
Hope this helps.
That's exactly what I was looking for, thanks very much.
Rik This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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