在qt中用c++如何将一个二进制文件里的多个相同结构的结构体逐一输出并存储在一个excel表里
时间: 2024-05-15 19:19:20 浏览: 185
首先,需要打开二进制文件,读取其中的数据。可以使用QFile类和QDataStream类来实现:
```
QFile file("filename.bin");
if(!file.open(QIODevice::ReadOnly)){
qDebug() << "Error opening file";
return;
}
QDataStream in(&file);
in.setByteOrder(QDataStream::LittleEndian); //设置字节序,根据实际情况选择
while(!in.atEnd()){
//读取数据并解析结构体
}
```
接下来,需要解析结构体并将数据存储在一个QList或QVector中。假设结构体为:
```
struct MyStruct{
int id;
QString name;
double value;
};
```
则解析代码可以如下:
```
QList<MyStruct> dataList;
while(!in.atEnd()){
MyStruct data;
in >> data.id >> data.name >> data.value;
dataList.append(data);
}
```
最后,需要将数据写入Excel表格。可以使用QAxObject类和Qt的ActiveX技术来实现。具体可以参考以下代码:
```
QAxObject* excel = new QAxObject("Excel.Application");
QAxObject* workbooks = excel->querySubObject("Workbooks");
QAxObject* workbook = workbooks->querySubObject("Add");
QAxObject* sheets = workbook->querySubObject("Worksheets");
QAxObject* sheet = sheets->querySubObject("Item(int)", 1); // 假设数据写入第一个sheet
int row = 1;
foreach(MyStruct data, dataList) {
sheet->querySubObject("Cells(int,int)", row, 1)->setProperty("Value", data.id);
sheet->querySubObject("Cells(int,int)", row, 2)->setProperty("Value", data.name);
sheet->querySubObject("Cells(int,int)", row, 3)->setProperty("Value", data.value);
row++;
}
workbook->dynamicCall("SaveAs(const QString&)", "filename.xlsx");
workbook->dynamicCall("Close()");
excel->dynamicCall("Quit()");
delete excel;
```
以上代码演示了如何将数据写入一个新的Excel文件中,你也可以打开一个已有的Excel文件并写入数据。注意,在使用QAxObject时需要在.pro文件中添加:
```
QT += axcontainer
```
完整代码如下:
```
#include <QApplication>
#include <QDebug>
#include <QFile>
#include <QDataStream>
#include <QAxObject>
struct MyStruct{
int id;
QString name;
double value;
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QFile file("filename.bin");
if(!file.open(QIODevice::ReadOnly)){
qDebug() << "Error opening file";
return 0;
}
QDataStream in(&file);
in.setByteOrder(QDataStream::LittleEndian);
QList<MyStruct> dataList;
while(!in.atEnd()){
MyStruct data;
in >> data.id >> data.name >> data.value;
dataList.append(data);
}
QAxObject* excel = new QAxObject("Excel.Application");
QAxObject* workbooks = excel->querySubObject("Workbooks");
QAxObject* workbook = workbooks->querySubObject("Add");
QAxObject* sheets = workbook->querySubObject("Worksheets");
QAxObject* sheet = sheets->querySubObject("Item(int)", 1);
int row = 1;
foreach(MyStruct data, dataList) {
sheet->querySubObject("Cells(int,int)", row, 1)->setProperty("Value", data.id);
sheet->querySubObject("Cells(int,int)", row, 2)->setProperty("Value", data.name);
sheet->querySubObject("Cells(int,int)", row, 3)->setProperty("Value", data.value);
row++;
}
workbook->dynamicCall("SaveAs(const QString&)", "filename.xlsx");
workbook->dynamicCall("Close()");
excel->dynamicCall("Quit()");
delete excel;
return a.exec();
}
```
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