我想通过我的Qt应用程序向excel表写入相当大量的数据。我目前使用以下代码。
QAxObject* pExcel = new QAxObject("Excel.Application", 0);
QAxObject* pWorkbooks = pExcel->querySubObject("Workbooks");
QAxObject* pWorkbook = pWorkbooks->querySubObject("Open(const QString&)", s_FilePath);
QAxObject* pWorksheet = pWorkbook->querySubObject("Worksheets(int)", 1);
for (int i = 0; i < iColumnCount; ++i)
{
for (int j = 0; j < iRowCount; ++j)
{
QAxObject* pCell = pWorksheet->querySubObject("Cells(Int, Int)", i + 1, j + 1);
pCell->setProperty("Value", "somevalue");
}
}
但是,pCell-&gt; setProperty()非常慢,以这种方式设置所有值需要很长时间。
有人知道更快地设置值的方法吗?
答案 0 :(得分:0)
找到一种批量更新单元格的方法,方法是从this帖子一次更新一系列单元格,以解决问题。
以下是从帖子中复制的代码。
QAxObject* excel = new QAxObject( "Excel.Application", 0 );
excel->dynamicCall("SetVisible(bool)",true);
QAxObject *workbooks = excel->querySubObject( "Workbooks" );
QAxObject *workbook = workbooks->querySubObject("Add()");
QAxObject *sheets = workbook->querySubObject( "Worksheets" );
QAxObject *sheet1 = sheets->querySubObject( "Item( int )", 1 );
sheet1->dynamicCall("SetName(const QString&)", QVariant(sheet1Name));
int n;
QList< QVariant> table;
for (int i=0; i<5; i++)
{
QList row;
for (int j=0; j<5; j++)
{
n = i*5+j;
row.append(QVariant(n));
}
table.append(QVariant(row));
}
//get a 5x5 range of cells : from A1 to E5
QAxObject *range = sheet1->querySubObject( "Range(const QString&, const QString&)", QString("A1"), QString("E5"));
QVariant vTable(table);
range->dynamicCall("SetValue(const QVariant&)", vTable);