qt读取csv数据画图_QT读取csv文件并且绘制折线图

void MainWindow::readcsvfile() //读取csv

{

QFile csvFile("C:/Users/Administrator/Desktop/Demo/0702.CSV");

QStringList csvList;

csvList.clear();

if (csvFile.open(QIODevice::ReadWrite)) //对csv文件进行读写操作

{

QTextStream stream(&csvFile);

while (!stream.atEnd())

{

csvList.push_back(stream.readLine()); //保存到List当中

}

csvFile.close();

}

else

{

QMessageBox::about(NULL, "csv文件", "未打开该文件！");

}

int i = 0;

Q_FOREACH(QString str, csvList) //遍历List

{

i = i + 1;

QStringList valsplit = str.split(","); //分隔字符串

if(i > 2)

{

//得到深度、声速、温度

QString depth = valsplit[0];

QString sonicvelocity = valsplit[1];

QString temperature = valsplit[2];

double depthvalue = depth.toDouble();