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要使用`COleSafeArray`将字符串写入Excel中,您需要遵循以下步骤:
1. 引入必要的头文件:
#include#include
2. 创建一个`COleVariant`对象来存储要写入的字符串值:
CString strValue = "Hello, World!"; COleVariant var(strValue);
3. 将`COleVariant`对象转换为`COleSafeArray`对象:
COleSafeArray sa; sa.CreateOneDim(VT_VARIANT, 1); LONG index[] = {0}; sa.PutElement(index, &var);
4. 打开Excel应用程序并获取`IDispatch`接口指针:
_Application app; app.CreateDispatch("Excel.Application");
5. 打开或创建一个工作簿:
Workbooks workbooks = app.GetWorkbooks(); _Workbook workbook; workbooks.Open(L"C:\\path\\to\\Workbook.xlsx", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL); // 如果要创建新的工作簿,请使用下面的代码: // _Workbook workbook = workbooks.Add();
6. 获取工作表对象:
Sheets sheets = workbook.GetSheets(); _Worksheet sheet; sheet = sheets.GetItem(COleVariant((short)(1)));
7. 将字符串值写入单元格:
Range range; range = sheet.GetCells(); range = range.GetItem(COleVariant((long)(1)), COleVariant((long)(1))); range.SetValue(COleVariant(sa));
8. 保存并关闭工作簿:
workbook.Save(); workbook.Close();
9. 退出Excel应用程序:
app.Quit();
完整的示例代码如下:
#include#include int main() { CoInitialize(NULL); CString strValue = "Hello, World!"; COleVariant var(strValue); COleSafeArray sa; sa.CreateOneDim(VT_VARIANT, 1); LONG index[] = {0}; sa.PutElement(index, &var); _Application app; app.CreateDispatch("Excel.Application"); Workbooks workbooks = app.GetWorkbooks(); _Workbook workbook; workbooks.Open(L"C:\\path\\to\\Workbook.xlsx", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL); //_Workbook workbook = workbooks.Add(); Sheets sheets = workbook.GetSheets(); _Worksheet sheet; sheet = sheets.GetItem(COleVariant((short)(1))); Range range; range = sheet.GetCells(); range = range.GetItem(COleVariant((long)(1)), COleVariant((long)(1))); range.SetValue(COleVariant(sa)); workbook.Save(); workbook.Close(); app.Quit(); CoUninitialize(); return 0; }
请确保已经链接到`ole32.lib`和`afxdisp.lib`库,并将文件路径替换为实际的Excel工作簿路径。