和| 处理。其中我用正则表达式过滤的一些无用标签。
代码是经过修改的，尽量通用化，理论上复制下来就能用。宏QTHQ_BASESHARED_EXPORT 删掉即可，原本是用于制作成dll的选项的，具体可以参考我的其它文章。
Qt制作dll（带ui）并调用，兼容32位和64位_redeclared without dllimport_大橘的博客-CSDN博客
hq_base_db_grid_excel.h:
/**************************************************************************************************
** File name: hq_base_db_grid_excel.h (HQ_Base_DB_Grid_Excel)
** Created by: Henrick.Nie at 2023-7-10
** Used for: Import/export the grid data from/to the excel file.
**************************************************************************************************/
#ifndef HQ_BASE_DB_GRID_EXCEL_H
#define HQ_BASE_DB_GRID_EXCEL_H
#include "qt-hq_base_global.h"
#include
#include
#include
#include
#include
#include
#include
#include "hq_base_db_grid.h"
class QTHQ_BASESHARED_EXPORT HQ_Base_DB_Grid_Excel
{
public:
static bool f_SaveToExcel(QTableWidget *oGrid,
const bool &bAskBeforeDoing, const bool &bAskBeforeOpenning, QString *sFilePath = nullptr,
QString *sErr = nullptr, const QString &sSheetName = QString());
static bool f_SaveToExcel(const QString &sExcelHtmlModel, QTableWidget *oGrid,
const bool &bAskBeforeDoing, const bool &bAskBeforeOpenning, QString *sFilePath = nullptr,
QString *sErr = nullptr, const QString &sSheetName = QString());
static bool f_GetFromExcel_AsXML(QString &sXML, QString *sErr = nullptr);
static bool f_GetFromExcel(const QString &sModel, QJsonArray &oArrRows, const bool &bFirstRowIsHeader = false, QString *sErr = nullptr);
static bool f_GetFromExcel(QTableWidget *oGrid, const bool &bFirstRowIsHeader = false, QString *sErr = nullptr);
static bool f_SetFirstRowToHeader(QTableWidget *oGrid, const bool &bSetHeader, QString *sErr = nullptr);
private:
static bool f_Grid_GetDataAsHtml(QTableWidget *oGrid, QString &sTableHtml, QString *sErr = nullptr);
static QString f_Grid_GetAlignByEnum(const int &iAlign);
static bool f_Excel_GetDataAsHtml(QString &sTableHtml, QString *sErr = nullptr);
};
#endif // HQ_BASE_DB_GRID_EXCEL_H
hq_base_db_grid_excel.cpp:
#include "hq_base_db_grid_excel.h"
/**================================================================================================
** Converts the grid data as the html table string, output it in the parameter 'sTableHtml'.
** Returns true on successed, otherwise returns false.
** ---------------------------------
** Format:
**
**
**
**
**
**
**
** | f1 |
** f2 |
** f3 |
** f4 |
**
**
** | 1 |
** 2 |
** 3 |
** 4 |
**
**
** | a |
** b |
** c |
** d |
**
**
** | cwd |
** qwe |
** xcz |
** excz |
**
**
**
**===============================================================================================*/
bool HQ_Base_DB_Grid_Excel::f_Grid_GetDataAsHtml(QTableWidget *oGrid, QString &sTableHtml, QString *sErr)
{
sTableHtml.clear();
if (nullptr == oGrid)
{
HQ_Base::f_Pointer_SetValue(sErr, QString("The grid is nullptr."));
return false;
}
//Indent
QString sTable_col, sTable_Rows_tr, sIndent_table = " ", sIndent_col = " ", sIndent_tr = " ", sIndent_td = " ";
//Headers and col info()
sTable_Rows_tr.append(sIndent_tr + "\n");
QString sHeader_td;
for (int iCol = 0; iCol < oGrid->columnCount(); ++iCol)
{
//width
QString sCol_Width = QString::number(oGrid->columnWidth(iCol));
//align
QTableWidgetItem *item = oGrid->horizontalHeaderItem(iCol);
int iAlign = (nullptr == item) ? 0 : item->textAlignment();
QString sCol_Align = f_Grid_GetAlignByEnum(iAlign);
sTable_col.append(sIndent_col + "\n");
//header row
sHeader_td.append(sIndent_td + "| " + oGrid->horizontalHeaderItem(iCol)->text() + " | \n");
}
sTable_Rows_tr.append(sHeader_td);
sTable_Rows_tr.append(sIndent_tr + " \n");
//data(|
| )
for (int iRow = 0; iRow < oGrid->rowCount(); ++iRow)
{
sTable_Rows_tr.append(sIndent_tr + "\n");
QString sRows_td;
for (int iCol = 0; iCol < oGrid->columnCount(); ++iCol)
{
QTableWidgetItem *item = oGrid->item(iRow, iCol);
QString sText;
if (nullptr != item)
{
sText = item->text();
}
sRows_td.append(sIndent_td + "| " + sText + " | \n");
}
sTable_Rows_tr.append(sRows_td);
sTable_Rows_tr.append(sIndent_tr + " \n");
}
//table
sTableHtml.append(sIndent_table + "\n");
sTableHtml.append(sTable_col);
sTableHtml.append(sTable_Rows_tr);
sTableHtml.append(sIndent_table + " \n");
HQ_Base::f_Pointer_SetValue(sErr, QString());
return true;
}
QString HQ_Base_DB_Grid_Excel::f_Grid_GetAlignByEnum(const int &iAlign)
{
quint16 iHAlign = iAlign | 0x000F;
QString sAlign;
switch (iHAlign) {
case 1:
sAlign = "left";
break;
case 2:
sAlign = "right";
break;
case 4:
sAlign = "center";
break;
default:
break;
}
return sAlign;
}
/**================================================================================================
** Save the grid data to excel.
**===============================================================================================*/
bool HQ_Base_DB_Grid_Excel::f_SaveToExcel(QTableWidget *oGrid,
const bool &bAskBeforeDoing, const bool &bAskBeforeOpenning,
QString *sFilePath, QString *sErr, const QString &sSheetName)
{
try
{
//Get the model.
QString sFile = "excel_html.md";
QFile f(sFile);
if (!f.exists())
{
throw QString("Can not find the model file.");
}
if (!f.open(QIODevice::ReadOnly|QIODevice::Text))
{
if (f.isOpen())
{
f.close();
}
throw QString("The model file openning failed.");
}
QString sExcelHtml = f.readAll();
if (f.isOpen())
{
f.close();
}
return f_SaveToExcel(sExcelHtml, oGrid, bAskBeforeDoing, bAskBeforeOpenning, sFilePath, sErr, sSheetName);
}
catch (QString sExceptionMsg)
{
HQ_Base::f_Pointer_SetValue(sErr, sExceptionMsg);
return false;
}
}
bool HQ_Base_DB_Grid_Excel::f_SaveToExcel(const QString &sExcelHtmlModel, QTableWidget *oGrid,
const bool &bAskBeforeDoing, const bool &bAskBeforeOpenning,
QString *sFilePath, QString *sErr, const QString &sSheetName)
{
try
{
HQ_Base::f_Pointer_SetValue(sFilePath, QString());
HQ_Base::f_Pointer_SetValue(sErr, QString());
QString sExcelHtml = sExcelHtmlModel;
if (sExcelHtml.isEmpty())
{
throw QString("The excel model lost.");
}
if (nullptr == oGrid)
{
throw QString("The grid does not exist.");
}
QString sMsg;
//Ask user before doing.
if (bAskBeforeDoing)
{
sMsg = "Export the grid data to the excel. Continue?";
if(QMessageBox::question(nullptr, "", sMsg, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes) != QMessageBox::Yes)
{
return false;
}
}
//Select the saving path.
QString sFile_Saved = QFileDialog::getSaveFileName(nullptr, "Select the saving path.",
QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation),
"Excel (*.xlsx);;Excel 97-2003 (*.xls)");
if (sFile_Saved.isEmpty())
{
return false;//If the user canceled, do nothing.
}
//If the target file is not writable.
QFile f_Save(sFile_Saved);
if (f_Save.isOpen() || !f_Save.open(QIODevice::WriteOnly|QIODevice::Text))
{
if (f_Save.isOpen())
{
f_Save.close();
}
throw QString("The target file is using. Perhaps it is already openned by an other program.");
}
//Sheet name.
if (!sSheetName.isEmpty())
{
sExcelHtml.replace(QRegularExpression("(?<=)[\\s\\S]*(?=)"), sSheetName);
}
//Html_table.
QString sTableHtml;
if (!f_Grid_GetDataAsHtml(oGrid, sTableHtml, sErr))
{
return false;
}
sExcelHtml.replace(QRegularExpression(""), sTableHtml);
//Save to file.
qint64 i = f_Save.write(sExcelHtml.toStdString().c_str());
if (f_Save.isOpen())
{
f_Save.close();
}
if (i < 0)
{
throw QString("The file writting failed.");
}
//Ask before openning.
if (bAskBeforeOpenning)
{
sMsg = "The excel file exporting successed, open it?\n";
if(QMessageBox::question(nullptr, "", sMsg + sFile_Saved, QMessageBox::Yes|QMessageBox::No) == QMessageBox::Yes)
{
//Open the file.
QDesktopServices::openUrl(QUrl("file:///" + QDir::toNativeSeparators(sFile_Saved)));
}
}
HQ_Base::f_Pointer_SetValue(sFilePath, sFile_Saved);
HQ_Base::f_Pointer_SetValue(sErr, QString());
return true;
}
catch (QString sExceptionMsg)
{
HQ_Base::f_Pointer_SetValue(sFilePath, QString());
HQ_Base::f_Pointer_SetValue(sErr, sExceptionMsg);
return false;
}
}
/**================================================================================================
** Import the excel data to the html string, and output into the parameter 'sTableHtml'.
**===============================================================================================*/
bool HQ_Base_DB_Grid_Excel::f_Excel_GetDataAsHtml(QString &sTableHtml, QString *sErr)
{
try
{
sTableHtml.clear();
HQ_Base::f_Pointer_SetValue(sErr, QString());
QString sFileName = QFileDialog::getOpenFileName(nullptr, "Select the saving path.",
QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation),
"Excel (*.xlsx);;Excel 97-2003 (*.xls)");
if (sFileName.isEmpty())
{
return false;//If the user canceled, do nothing.
}
QFile f(sFileName);
if (!f.open(QIODevice::ReadOnly|QIODevice::Text))
{
if (f.isOpen())
{
f.close();
}
throw QString("The excel file openning failed.");
}
QString sExcelHtml = f.readAll();
if (f.isOpen())
{
f.close();
}
QRegularExpressionMatch match = QRegularExpression("]*>[\\s\\S]*
|
