38.QT-QAxObject快速写入EXCEL示例

参考链接:https://blog.csdn.net/czyt1988/article/details/52121360

http://blog.sina.com.cn/s/blog_a6fb6cc90101gv2p.html

1. QAxObject介绍

在QT中,有个自带的QAxObject类,可以直接操作EXCEL

除此之外,当我们操作某个文件夹下的EXCEL的时候,都会在该文件夹下出现一个隐藏文件~$XX.xlsx,如下图所示:

此时,如果我们再用QAxObject去操作这个文件时,该文件是只读的,无法保存成功的,所以我们使用QAxObject时,需要提前判断一次.

2.示例

首先在项目下创建一个模板templatePath.xlsx文件

3.效果如下

4.写代码

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

/*excel操作*/
enum EXcel_ColumnType{
    ColumnA = ,
    ColumnB = ,
    ColumnC = ,
    ColumnD = ,
    ColumnE = ,
    ColumnF = ,
    ColumnG = ,
    ColumnH = ,
    ColumnI =
};

QString saveas()
{
    QString file;
    QString filter;

    //如果版本低于QT5,则需要将:
    //  QStandardPaths::writableLocation(QStandardPaths::DesktopLocation),
    //改为:QDesktopServices::storageLocation(QDesktopServices::DesktopLocation),
    file = QFileDialog::getSaveFileName (
     NULL,                               //父组件
    "另存为",                              //标题
     QStandardPaths::writableLocation(QStandardPaths::DesktopLocation),                 //设置路径, .表示当前路径,./表示更目录
     "Excel(*.xlsx)",     //过滤器
     &filter  );

    return file;
}

//设置EXCEL中单个内容的数据
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转为QList<QList<QVariant> >,用于快速读出的
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=;i<rowCount;++i)
    {
        rowData = varRows[i].toList();
        res.push_back(rowData);
    }
}

//把QList<QList<QVariant> > 转为QVariant,用于快速写入的
void castListListVariant2Variant(const QList<QList<QVariant> > &cells, QVariant &res)
{
    QVariantList vars;
    const int rows = cells.size();
    for(int i=;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 ;
    }

    templatePath = info.absoluteFilePath();                   //获取模板的绝地路径
    templatePath = QDir::toNativeSeparators(templatePath);   //转换一下路径,让windows能够识别

    QString ExcelFile = QDir::toNativeSeparators(saveas());  //打开文件保存对话框,找到要保存的位置

    if(ExcelFile=="")
            return  ;

    QFile::copy(templatePath, ExcelFile);                   //将模板文件复制到要保存的位置去

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

    if(info.exists())          //判断一下,有没有"~$XXX.xlsx"文件存在,是不是为只读
    {
        qDebug()<<"报表属性为只读,请检查文件是否已打开!";
         return   ;
    }

    QAxObject *excel = new QAxObject();//建立excel操作对象
    excel->setControl("Excel.Application");//连接Excel控件
    excel->setProperty("Visible", true);//显示窗体看效果
    excel->setProperty("DisplayAlerts", false);//显示警告看效果
    QAxObject *workbooks = excel->querySubObject("WorkBooks");

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

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

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

    Excel_SetCell(worksheet,ColumnB,,QColor(,,),"");     //设置B2单元格内容为12345

    Excel_SetCell(worksheet,ColumnB,,QColor(,,),"B3");     //设置B3单元格内容

    Excel_SetCell(worksheet,ColumnB,,QColor(,,),"B4");     //设置B4单元格内容

    /*批量一次性设置A6~I106所在内容*/
    QAxObject *user_range = worksheet->querySubObject("Range(const QString&)","A6:I106");

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

    QVariant var;
    castListListVariant2Variant(datas,var);

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

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

    // workbook->dynamicCall("Close()");  //关闭文件
    // excel->dynamicCall("Quit()");//关闭excel

    return ;

}

未完待续,下章学习Qtxlsx库操作EXCEL: https://www.cnblogs.com/lifexy/p/10743352.html