Here presents a new method for c# calling c++. A function “Add” is defined in c++ which returns the sum of two input integers, the function also call c# method “Show” to print the result.

Using cle to developed c# extension, c++ externsion should be compiled into a sharelib which exports two functions StarCoreService_Init and StarCoreService_Term. There are four steps:

1.       Create service.

2.       Create interface object, and defines a new function “Add” of it.

3.       Write function code of Add.

4.       Set function address of Add to object’ function definition.

#include "vsopenapi.h"

static class ClassOfSRPInterface *SRPInterface;

//--Step 3 :  Add function body

static VS_INT32 Add(void *Object,VS_INT32 x,VS_INT32 y)

{

     //--Callback script function

     SRPInterface -> ScriptCall(Object,NULL,"Show","(i)",x+y);

         return x + y;

}

VS_BOOL StarCoreService_Init(class ClassOfStarCore *starcore)

{

         void *AtomicClass,*Add_AtomicFunction;

         class ClassOfBasicSRPInterface *BasicSRPInterface;

         //--Step 1 :  Create service

         BasicSRPInterface = starcore ->GetBasicInterface();         

         BasicSRPInterface ->CreateService("","AddFunctionService",NULL,"123",0,0,0,0,0,0);

         //--Step 2 :  Create object and defines a new function “Add”

         SRPInterface = BasicSRPInterface ->GetSRPInterface("AddFunctionService","root","123");

         AtomicClass = SRPInterface ->CreateAtomicObjectSimple("TestItem","TestClass",NULL,NULL,NULL);

         Add_AtomicFunction = SRPInterface ->CreateAtomicFunctionSimple(AtomicClass,"Add","VS_INT32 Add(VS_INT32 x,VS_INT32 y);",NULL,NULL,VS_FALSE,VS_FALSE);

         //--Step 4 :  Set function address to Add function

         SRPInterface -> SetAtomicFunction(Add_AtomicFunction,(void *)Add);

         return VS_TRUE;

}

void StarCoreService_Term(class ClassOfStarCore *starcore)

{

         SRPInterface -> Release();

         return;

}

Compile into sharelibrary, may be named “AddFunctionService.dll”.

For c# code calls the above sharelib, there are four steps;

1.       Init cle, create service group,import sharelibrary,  and create service.

2.       Define extends class of StarObjectClass, which implement callback function “Show”.

3.       Create Instance of object “TestClass” defined in sharelibrary.

4.       call function “Add”.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using star_csharp;

namespace csharp_call

{

class MyObjectClass : StarObjectClass{

//--Step2 : Define extends class of StarObjectClass and implements callback function “Show”.

       public void Show( StarObjectClass self,int para )

       {

         Console.WriteLine("print from java call back "+para);

         return;

       }

         public MyObjectClass(StarObjectClass srcobj):base(srcobj){

    }     

    }

    class Program

    {

        static void Main (string[] args)

        {

//--Step1 : Init cle, create service group,import sharelibrary,  and create service

         StarCoreFactory starcore= StarCoreFactory.GetFactory();

         StarServiceClass Service=starcore._InitSimple("test","123",0,0,"AddFunctionService.dll");

         //--Step3 : Create Instance of object “TestClass” defined in sharelibrary.

         MyObjectClass a = new MyObjectClass( Service._GetObject("TestClass")._New() );

         //--Step4 : call function “Add”.

        Console.WriteLine("Add returns : " + a._Call("Add", 12, 34));

        starcore._ModuleExit();

        }

    }

}