參考鏈接: https://blog.csdn.net/czyt1988/article/details/52121360

1. QAxObject介紹

在QT中,有個自帶的QAxObject類,可以直接操作EXCEL

除此之外,當我們操作某個文件夾下的EXCEL的時候,都會在該文件夾下出現一個隱藏文件~$XX.xlsx,如下圖所示:

此時,如果我們再用QAxObject去操作這個文件時,該文件是只讀的,無法保存成功的,所以我們使用QAxObject時,需要提前判斷一次.

2.示例

首先在項目下創建一個模板templatePath.xlsx文件

3.效果如下

4.寫代碼

#include <QApplication>
#include "widget.h"
#include <QtGui>
#include <QAxObject>
#include <QStandardPaths>
#include <QFileDialog>
#include <QFileDialog>

 
/*excel操作*/
enum EXcel_ColumnType{
    ColumnA = 1,
    ColumnB = 2,
    ColumnC = 3,
    ColumnD 
 
= 4,
    ColumnE = 5,
    ColumnF = 6,
    ColumnG = 7,
    ColumnH = 8,
    ColumnI = 9
};

 
QString saveas()
{
    QString file;
    QString filter;
 

    //如果版本低於QT5,則需要將:
    //  QStandardPaths::writableLocation(QStandardPaths::DesktopLocation),
    //改為:QDesktopServices::storageLocation(QDesktopServices::DesktopLocation),
 

    file = QFileDialog::getSaveFileName (
     NULL,                               //父組件
    "另存為",                              //標題
     QStandardPaths::writableLocation(QStandardPaths::DesktopLocation),                 //設置路徑, .表示當前路徑,./表示更目錄
     "Excel(*.xlsx)",     //過濾器
     &filter  );

    return file;
}

//設置EXCEL中單個內容的數據
void  Excel_SetCell(QAxObject *worksheet,EXcel_ColumnType column,int row,QColor color,QString text)
{
  QAxObject *cell = worksheet->querySubObject("Cells(int,int)", row, column);
  cell->setProperty("Value", text);
  QAxObject *font = cell->querySubObject("Font");
  font->setProperty("Color", color);
}


//把QVariant轉為QList<QList<QVariant> >,用於快速讀出的
void castVariant2ListListVariant(const QVariant &var, QList<QList<QVariant> > &res)
{
    QVariantList varRows = var.toList();
    if(varRows.isEmpty())
    {
        return;
    }

    const int rowCount = varRows.size();
    QVariantList rowData;

    for(int i=0;i<rowCount;++i)
    {
        rowData = varRows[i].toList();
        res.push_back(rowData);
    }
}

//把QList<QList<QVariant> > 轉為QVariant,用於快速寫入的
void castListListVariant2Variant(const QList<QList<QVariant> > &cells, QVariant &res)
{
    QVariantList vars;
    const int rows = cells.size();
    for(int i=0;i<rows;++i)
    {
        vars.append(QVariant(cells[i]));
    }
    res = QVariant(vars);
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QString templatePath = "./template.xlsx";
    QFileInfo info(templatePath);

    if(!info.exists())
    {
            qDebug()<<"template.xlsx is NULL";
            return 0;
    }

    templatePath = info.absoluteFilePath();                   //獲取模板的絕地路徑
    templatePath = QDir::toNativeSeparators(templatePath);   //轉換一下路徑,讓windows能夠識別

    QString ExcelFile = QDir::toNativeSeparators(saveas());  //打開文件保存對話框,找到要保存的位置

    if(ExcelFile=="")
            return  0;

    QFile::copy(templatePath, ExcelFile);                   //將模板文件復制到要保存的位置去

    info.setFile(ExcelFile);
    info.setFile(info.dir().path()+"/~$"+info.fileName());

    if(info.exists())          //判斷一下,有沒有"~$XXX.xlsx"文件存在,是不是為只讀
    {
        qDebug()<<"報表屬性為只讀,請檢查文件是否已打開!";
         return   0;
    }

 
    QAxObject *excel = new QAxObject();//建立excel操作對象
    excel->setControl("Excel.Application");//連接Excel控件
    excel->setProperty("Visible", true);//顯示窗體看效果
    excel->setProperty("DisplayAlerts", false);//顯示警告看效果
    QAxObject *workbooks = excel->querySubObject("WorkBooks");

    QAxObject* workbook = workbooks->querySubObject("Open(const QString&)",QDir::toNativeSeparators(ExcelFile) ); //打開

    excel->setProperty("Caption", "Qt Excel");      //標題為Qt Excel
    QAxObject *work_book = excel->querySubObject("ActiveWorkBook");

    QAxObject *worksheet = work_book->querySubObject("Sheets(int)",1);     //獲取表單1

    Excel_SetCell(worksheet,ColumnB,2,QColor(74,51,255),"12345");     //設置B2單元格內容為12345

    Excel_SetCell(worksheet,ColumnB,3,QColor(255,255,0),"B3");     //設置B3單元格內容

    Excel_SetCell(worksheet,ColumnB,4,QColor(255,0,0),"B4");     //設置B4單元格內容

 

    /*批量一次性設置A6~I106所在內容*/
    QAxObject *user_range = worksheet->querySubObject("Range(const QString&)","A6:I106");

    QList<QList<QVariant>> datas;
    for(int i=1;i<101;i++)
    {
        QList<QVariant> rows;
        for(int j=1;j<10;j++)
        {
            rows.append(i*j);
        }
        datas.append(rows);
    }

    QVariant var;
    castListListVariant2Variant(datas,var);

    user_range->setProperty("Value", var);

 
    workbook->dynamicCall("Save()" );


    // workbook->dynamicCall("Close()");  //關閉文件
    // excel->dynamicCall("Quit()");//關閉excel

    return 0;

}

未完待續,下章學習Qtxlsx庫操作EXCEL: https://www.cnblogs.com/lifexy/p/10743352.html

38.QT-QAxObject快速寫入EXCEL示例