siclient.cpp

Vc.Net入门与提高源码

#include "stdafx.h"
#using <mscorlib.dll>
using namespace System;
// 如果SIServerLib.dll文件没有找到，你需要创建SIServer解决方案，然后执行/Bin
//目录的CreateTypeLib.bat脚本文件,生成该文件
#using "../bin/SIServerLib.dll"

using namespace System;
using namespace SIServerLib;

using namespace Reflection;		//只用于后期绑定

//这个类用于说明如何进行早期绑定
__gc class CSIEB
{
public:
	//构造函数
	CSIEB()
	{   //创建一个COM组件对象的实例，也就是说生成一个运行态可
		//调用的包装类，这个类负责组件实例化
		
		pSystemInfo = new CDGetSystemInfo;
	}

	// 返回当前主机的名字
	String* PrintComputerName()
	{
		if (pSystemInfo)
		{
			// 从Com组件服务器获得主机名
			return String::Concat(S"当前主机的名字为",pSystemInfo->GetMyComputerName());
		}
		else
			return (String*) 0;
	}

private:
	CDGetSystemInfo *pSystemInfo;
};

// Class to demonstrate late binding.
__gc class CSILB
{
public:
	// Constructor
	CSILB()
	{
		// Get Type object for COM server. It uses ProgID of DClock class.
		typ = Type::GetTypeFromProgID("SIServer.DGetSystemInfo");

		// obtain instance of COM object.
		obj = Activator::CreateInstance(typ);

		// Create array of parameters.
		args = new Object*[0];
	}

	// Returns string that has current time.
	// If bAddDate is not 0, it returns date and time,
	// if bAddDate is 0, returns time only.
	String* PrintComputerName()
	{
		if (!typ || !obj)
		return (String*) 0;
		return String::Concat(S"当前主机的名字为",typ->InvokeMember("GetMyComputerName", BindingFlags::InvokeMethod, Type::DefaultBinder, obj,0));
	}

private:
	Type *typ;
	Object *obj;
	Object* args[];
};


// This is the entry point for this application
#ifdef _UNICODE
int wmain(void)
#else
int main(void)
#endif
{
	String *result;

	// Create and use managed C++ class that uses early binding.
	try 
	{
		CSIEB *objEB;
		objEB = new CSIEB();
		result = objEB->PrintComputerName();

		if (result)
			Console::WriteLine(result);
		else
			Console::WriteLine(S"出错信息: 无法得到主机名字");
	
		// 创建使用一个后期绑定的托管C++类
		CSILB *objLB;
		objLB = new CSILB();
		result = objLB->PrintComputerName();

		if (result)
			Console::WriteLine(result);
		else
			Console::WriteLine(S"出错信息: 无法得到主机名字");
	}
	catch(Exception* e) 
	{
		Console::WriteLine("错误信息： {0}", e->Message);
	}


	Console::Write("\n\n按回车键继续");
	Console::ReadLine();
	return 0;
}