QTableView輸出保存爲.csv或.txt

Question

我爲qt gui編寫了下面的代碼來查看QTableView（面向模型）中的查詢輸出。現在我想將此輸出保存爲.csv或.txt文件。有建議使用QTableWidget（面向項目），但我想堅持基於模型的方法。

void MainWindow::on_pushButton_clicked() 
{ 
db = QSqlDatabase::addDatabase("QOCI"); 
db.setHostName("host"); 
db.setDatabaseName("db"); 
db.setUserName("uid"); 
db.setPassword("pw"); 
db.setPort(port); 

QString MyQuery = ui->lineEdit->text(); 

if (db.open()) 
{ 
    qDebug()<<QDateTime::currentDateTime()<<"QUERY DONE SUCCESSFULLY "; 

    this->model=new QSqlQueryModel(); 
    model->setQuery(MyQuery); 
    ui->tableView->setModel(model); 

} 
else 
{ 
    qDebug()<<QDateTime::currentDateTime()<<"YOU FORGOT THE QUERY "<<db.lastError().text(); 
} 

}

任何指引???

Answer 1

您可以根據自己的實際需求進行定製：

// [Collect model data to QString] 
QString textData; 
int rows = model->rowCount(); 
int columns = model->columnCount(); 

for (int i = 0; i < rows; i++) { 
    for (int j = 0; j < columns; j++) { 

      textData += model->data(model->index(i,j)).toString(); 
      textData += ", "  // for .csv file format 
    } 
    textData += "\n";    // (optional: for new line segmentation) 
} 

// [Save to file] (header file <QFile> needed) 
// .csv 
QFile csvFile("test.csv");  
if(csvFile.open(QIODevice::WriteOnly | QIODevice::Truncate)) { 

    QTextStream out(&csvFile); 
    out << textData; 

    csvFile.close(); 
} 

// .txt 
QFile txtFile("test.txt");  
if(txtFile.open(QIODevice::WriteOnly | QIODevice::Truncate)) { 

    QTextStream out(&txtFile); 
    out << textData; 

    txtFile.close(); 
} 

Answer 2

你可以通過你的模型保存到文本文件：

QFile f("table.txt"); 
if(f.open(QIODevice::WriteOnly)) 
{ 
    QTextStream ts(&f); 
    QStringList strList; 
    for (int i=0; i<model->rowCount(); i++) 
    { 
     strList.clear(); 

     for (int j=0; j<model->columnCount(); j++) 
      strList << model->data(model->index(i,j)).toString(); 

     ts << strList.join(" ") + "\n"; 
    } 
    f.close(); 
} 

在這裏，每行的模型數據都保存一行由空間隔開。如果你想通過一些其他人物像逗號將它們分開只需更換該參數的加盟，如：

ts << strList.join(",") + "\n"; 

Answer 3

這裏是一個QTableView中導出爲CSV，包括列名

void staticmethods::exportTableViewToCSV(QTableView *table) { 
      QString filters("CSV files (*.csv);;All files (*.*)"); 
      QString defaultFilter("CSV files (*.csv)"); 
      QString fileName = QFileDialog::getSaveFileName(0, "Save file", QCoreApplication::applicationDirPath(), 
           filters, &defaultFilter); 
      QFile file(fileName); 

      QAbstractItemModel *model = table->model(); 
      if (file.open(QFile::WriteOnly | QFile::Truncate)) { 
       QTextStream data(&file); 
       QStringList strList; 
       for (int i = 0; i < model->columnCount(); i++) { 
        if (model->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString().length() > 0) 
         strList.append("\"" + model->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString() + "\""); 
        else 
         strList.append(""); 
       } 
       data << strList.join(";") << "\n"; 
       for (int i = 0; i < model->rowCount(); i++) { 
        strList.clear(); 
        for (int j = 0; j < model->columnCount(); j++) { 

         if (model->data(model->index(i, j)).toString().length() > 0) 
          strList.append("\"" + model->data(model->index(i, j)).toString() + "\""); 
         else 
          strList.append(""); 
        } 
        data << strList.join(";") + "\n"; 
       } 
       data << strList.join(";") << "\n"; 
       file.close(); 
      } 

     } 

方式