如何通过COM对象读写Excel连同Excel实例手动操作

Question

我正在尝试通过 COM 读写 Excel。同时，我也想手动修改单元格的值。似乎存在访问冲突。我怎样才能检测到这种冲突并避免它/

以下是我的代码示例。在该示例中，do-loop 将继续将单元格 A1 的值复制到单元格 A2。当我想在 COM 运行期间手动修改值 A1 时，发生错误并退出程序。

//MicroSoft Office Objects
#import "C:\Program Files (x86)\Common Files\microsoft shared\OFFICE12\mso.dll"\
rename("DocumentProperties","DocumentPropertiesXL")\
rename("RGB","RBGXL")

//Microsoft VBA Objects
#import "C:\Program Files (x86)\Common Files\microsoft shared\VBA\VBA6\vbe6ext.olb"

//EXCEL application objects
#import "C:\Program Files (x86)\Microsoft Office\Office12\excel.exe" \
rename("DialogBox","DialogBoxXL") \
rename("RGB","RGBCL") \
rename("DocumentProperties","DocumentPropertiesXL")\
rename("ReplaceText","ReplaceTextXL") \
rename("CopyFile","CopyFileXL") \
exclude("IFont","IPicture") no_dual_interfaces

#include "stdafx.h"

#include <iostream>


int main(int argc, _TCHAR* argv[])
{


    //A try block is used to trap any errors in communication
    try
    {
        //Initialize COM interface
        CoInitialize(NULL);

        Excel::_ApplicationPtr XL;

        //Start the Excel Application
        XL.CreateInstance(L"Excel.Application");

        //Make the Excel Application visible, so that we can see it!
        XL->Visible=true;


        Excel::_WorkbookPtr pWorkbook;
        pWorkbook=XL->Workbooks->Open(L"D:\test.xls");

        //Get a pointer to the active worksheet     
        Excel::_WorksheetPtr pSheet = pWorkbook->Sheets->Item[L"Sheet1"];

        //Get a pointer to the cells on the active worksheet
        Excel::RangePtr pRange = pSheet->Cells;



        pRange->Item[1][1]=20;

        int a;

        //perform a loop to copy value in A1 to A2
        do
        {
            a=pRange->Item[1][1];
            std::cout<<"a="<<a<<std::endl;
            pRange->Item[2][1]=a;
        }while(a>0);

    }
    //If a communication error is thrown, catch it and complain
    catch(_com_error)
    {
        std::cout<<"COM error "<<std::endl;
    }

    //Finally Uninitialise the COM interface

    CoUninitialize();

    //Finish the C++ program

    return 0;
}

Answer 1

我已经通过直接使用COM而不是OLE解决了这个问题阅读 freddie1 的文章后 http://www.cplusplus.com/forum/windows/125996/

谢谢。

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