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C++和C#编写调用COM组件

 2010-05-27 20:37:10 来源:WEB开发网   
核心提示:程序代码:using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;us

程序代码:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using ADDCOMLib;
public partial class _Default : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
  }
  protected void ButtonCom_Click(object sender, EventArgs e)
  {
    Add add = new Add();
    int iresult;
    float fresult;
    int sresult;
    add.IAdd(10, 20, out iresult);
    add.fadd((float)1.2,(float)2.3, out fresult);
    add.isub(100, 10, out sresult);
    TextBoxResult.Text = iresult.ToString();
    TextBoxRe2.Text = fresult.ToString();
    TextBoxRe3.Text = sresult.ToString();
  }
}

4、在VC6.0中编写COM组件,使用VC6.0调用

(1)VC6.0编写COM组件

使用VC6.0建立COM组件,工程类型:ATL COM AppWizard

程序代码:

接口:

interface IAdd : IDispatch
    {
        [id(1), helpstring("method iadd")] HRESULT iadd([in]int a, [in]int b, [out]int * c);
        [id(2), helpstring("method fadd")] HRESULT fadd([in]float a, [in]float b, [out]float * c);
        [id(3), helpstring("method isub")] HRESULT isub([in]int a, [in]int b, [out]int * c);
    };

实现:

STDMETHODIMP CAdd::iadd(int a, int b, int *c)
{
    // TODO: Add your implementation code here
    *c = a + b;
    return S_OK;
}
STDMETHODIMP CAdd::fadd(float a, float b, float *c)
{
    // TODO: Add your implementation code here
    *c = a + b;
    return S_OK;
}
STDMETHODIMP CAdd::isub(int a, int b, int *c)
{
    // TODO: Add your implementation code here
    *c = a - b;
    return S_OK;
}

(2)VC6.0编写调用程序

使用VC6.0建立MFC应用程序UseCOM,调用刚刚建立的COM组件

将上面程序AddCom生成的AddCom.dll放入本程序的工程目录和程序生成目录中

在StdAfx.h中加入:

#import "AddCom.dll" no_namespace

程序代码:

void CUseComDlg::OnBUTTONUse()
{
    // TODO: Add your control notification handler code here
    CString strResult;
    CoInitialize(NULL);//NULL换成0也可以
    IAddPtr m_add = NULL;
    HRESULT hr = S_OK;
    hr = m_add.CreateInstance(__uuidof(Add));
    int d_a = 90;
    int d_b = 10;
    int d_c;
    int d_d;
    float f_a = 1;
    float f_b = 2;
    float f_c;
    m_add->_IAdd(d_a,d_b,&d_c);
    m_add->fadd(f_a,f_b,&f_c);
    m_add->isub(d_a,d_b,&d_d);
    strResult.Format("返回结果:%d; %f; %d",d_c,f_c,d_d);
    MessageBox(strResult,"结果",MB_OK);
    m_add.Release();
    m_add = NULL;
    CoUninitialize();

}

结束语:希望能对大家有帮助!

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Tags:编写 调用 COM

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