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pass the method from c++ to C# for ThreadPool.QueueUserWorkItem

Hi I am trying to something like

I have a method called process written in c++. and trying to do ThreadPool.QueueUserWorkItem(process) in C#. This ThreadPool.QueueWorkItem is defined in C# in the constructor in a class

So, I got the instance of that class in c++ and trying to pass the c++ method to the C# file for Threadpool.

Any help is greatly appreciated! Thanks a lot!

Example Code:
 
C# code:
public delegate void Process();
public class ThreadClass
{
//Constructor
public ThreadClass(Process del,string x)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(0,del), x);
}
}
 
c++ code:
int main(array<System::String ^> ^args)
{
string x = "something";
//when the below call is made the prcess must be queusd for work
ThreadClass(&process,x);
}
 
static void process()
{
// do something
}

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Omego2K

1. Declare your ThreadClass as follows:

public delegate void Process(object test);
public class ThreadClass
{
public ThreadClass(Process del, string x)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(del), x);
}
}

2. Declare your process method in C++ as follows:
Void process(Object ^ee){MessageBox::Show("addsa");}

3. To use the delegate, use this code:
String ^x = "something";
ClassLibrary1::Process ^pro = gcnew ClassLibrary1::Process(this, &Form1::process);
ClassLibrary1::ThreadClass ^dd = gcnew ClassLibrary1::ThreadClass(pro, x);

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Omego2K

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srinathchow

ASKER

Thanks for the help Omego!

I am lookiing for the 3rd scenario and tried it. I directly used the Threadpool::QueueUserWorkItem in c++ and it works. I am trying it pass it to C# for Queuing because I am new to c++ and I got errors which got no success.

The mistake i am doing is i am declaring the void Process(System ^ Object) in main.h instead of main.cpp file. By following your above steps mentioned in 3 solved my problem.

code:
using namespace main;
void Process(Object^ signal);
int main(array<System::String ^> ^args)
{
String ^x = "something";
System::Threading::ThreadPool::QueueUserWorkItem(gcnew WaitCallback(&Process,x);
}

static void Process(Object^ signal)
{ //do something }

Thanks a lot!