C语言 win32 获取Worksheets对象 实例
时间: 2024-01-22 19:20:31 浏览: 74
在Windows平台下,使用C语言获取Excel的Worksheets对象实例可以通过以下步骤实现:
1. 引入头文件和库文件
需要引入以下头文件:
```c
#include <windows.h>
#include <ole2.h>
#include "excel.h"
```
其中excel.h是包含了Excel对象的定义的头文件,需要自行定义。
需要链接以下库文件:
```c
#pragma comment(lib, "ole32.lib")
#pragma comment(lib, "oleaut32.lib")
```
2. 初始化COM库
使用CoInitialize函数初始化COM库:
```c
HRESULT hr = CoInitialize(NULL);
if (FAILED(hr)) {
// 初始化COM库失败
}
```
3. 获取Excel对象
使用CoCreateInstance函数创建Excel对象:
```c
CLSID clsid;
HRESULT hr = CLSIDFromProgID(L"Excel.Application", &clsid);
if (FAILED(hr)) {
// 获取Excel的CLSID失败
}
IDispatch *pExcelApp;
hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void**)&pExcelApp);
if (FAILED(hr)) {
// 创建Excel对象失败
}
```
4. 获取Workbooks对象
使用Excel对象的Application属性获取Workbooks对象:
```c
VARIANT result;
DISPPARAMS paramsNoArgs = {NULL, NULL, 0, 0};
hr = Excel_GetProperty(pExcelApp, L"Application", &result);
if (FAILED(hr)) {
// 获取Application属性失败
}
IDispatch *pExcelApp2 = result.pdispVal;
hr = Excel_InvokeMethod(pExcelApp2, L"Workbooks", &result, ¶msNoArgs);
if (FAILED(hr)) {
// 调用Workbooks方法失败
}
IDispatch *pWorkbooks = result.pdispVal;
```
5. 获取Worksheets对象
使用Workbooks对象的Open方法打开Excel文件,并获取Worksheets对象:
```c
VARIANT vFilename;
VARIANT vUpdateLinks;
VARIANT vReadOnly;
DISPID dispidNamed = DISPID_PROPERTYPUT;
VariantInit(&vFilename);
VariantInit(&vUpdateLinks);
VariantInit(&vReadOnly);
vFilename.vt = VT_BSTR;
vFilename.bstrVal = SysAllocString(L"C:\\example.xlsx");
vUpdateLinks.vt = VT_BOOL;
vUpdateLinks.boolVal = VARIANT_FALSE;
vReadOnly.vt = VT_BOOL;
vReadOnly.boolVal = VARIANT_FALSE;
DISPPARAMS paramsOpen = {
&vFilename,
&dispidNamed,
1,
3
};
hr = Excel_InvokeMethod(pWorkbooks, L"Open", &result, ¶msOpen);
if (FAILED(hr)) {
// 打开Excel文件失败
}
IDispatch *pWorkbook = result.pdispVal;
DISPPARAMS paramsNoArgs = {NULL, NULL, 0, 0};
hr = Excel_InvokeMethod(pWorkbook, L"Worksheets", &result, ¶msNoArgs);
if (FAILED(hr)) {
// 获取Worksheets对象失败
}
IDispatch *pWorksheets = result.pdispVal;
```
6. 释放资源
最后,需要释放所有申请的资源:
```c
VariantClear(&vFilename);
VariantClear(&vUpdateLinks);
VariantClear(&vReadOnly);
pWorksheets->Release();
pWorkbook->Release();
pWorkbooks->Release();
pExcelApp2->Release();
pExcelApp->Release();
CoUninitialize();
```
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