Coursach/Course/BusinessLogic/OfficePackage/Implements/SaveToExcel.cs

using BusinessLogic.OfficePackage.HelperModels;
using BusinessLogic.OfficePackage.HelperEnums;
using DocumentFormat.OpenXml.Office2010.Excel;
using DocumentFormat.OpenXml.Office2013.Excel;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using DocumentFormat.OpenXml;

namespace BusinessLogic.OfficePackage.Implements
{
    public class SaveToExcel : AbstractSaveToExcel
    {
        private SpreadsheetDocument? _spreadsheetDocument;

        private SharedStringTablePart? _shareStringPart;

        private Worksheet? _worksheet;

        private static void CreateStyles(WorkbookPart workbookpart)
        {
            var sp = workbookpart.AddNewPart<WorkbookStylesPart>();
            sp.Stylesheet = new Stylesheet();

            var fonts = new Fonts() { Count = 2U, KnownFonts = true };

            var fontUsual = new Font();
            fontUsual.Append(new FontSize() { Val = 12D });
            fontUsual.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color() { Theme = 1U });
            fontUsual.Append(new FontName() { Val = "Times New Roman" });
            fontUsual.Append(new FontFamilyNumbering() { Val = 2 });
            fontUsual.Append(new FontScheme() { Val = FontSchemeValues.Minor });

            var fontTitle = new Font();
            fontTitle.Append(new Bold());
            fontTitle.Append(new FontSize() { Val = 14D });
            fontTitle.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color() { Theme = 1U });
            fontTitle.Append(new FontName() { Val = "Times New Roman" });
            fontTitle.Append(new FontFamilyNumbering() { Val = 2 });
            fontTitle.Append(new FontScheme() { Val = FontSchemeValues.Minor });

            fonts.Append(fontUsual);
            fonts.Append(fontTitle);

            var fills = new Fills() { Count = 2U };

            var fill1 = new Fill();
            fill1.Append(new PatternFill() { PatternType = PatternValues.None });

            var fill2 = new Fill();
            fill2.Append(new PatternFill() { PatternType = PatternValues.Gray125 });

            fills.Append(fill1);
            fills.Append(fill2);

            var borders = new Borders() { Count = 2U };

            var borderNoBorder = new Border();
            borderNoBorder.Append(new LeftBorder());
            borderNoBorder.Append(new RightBorder());
            borderNoBorder.Append(new TopBorder());
            borderNoBorder.Append(new BottomBorder());
            borderNoBorder.Append(new DiagonalBorder());

            var borderThin = new Border();

            var leftBorder = new LeftBorder() { Style = BorderStyleValues.Thin };
            leftBorder.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color() { Indexed = 64U });

            var rightBorder = new RightBorder() { Style = BorderStyleValues.Thin };
            rightBorder.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color() { Indexed = 64U });

            var topBorder = new TopBorder() { Style = BorderStyleValues.Thin };
            topBorder.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color() { Indexed = 64U });

            var bottomBorder = new BottomBorder() { Style = BorderStyleValues.Thin };
            bottomBorder.Append(new DocumentFormat.OpenXml.Office2010.Excel.Color() { Indexed = 64U });

            borderThin.Append(leftBorder);
            borderThin.Append(rightBorder);
            borderThin.Append(topBorder);
            borderThin.Append(bottomBorder);
            borderThin.Append(new DiagonalBorder());

            borders.Append(borderNoBorder);
            borders.Append(borderThin);

            var cellStyleFormats = new CellStyleFormats() { Count = 1U };
            var cellFormatStyle = new CellFormat() { NumberFormatId = 0U, FontId = 0U, FillId = 0U, BorderId = 0U };

            cellStyleFormats.Append(cellFormatStyle);

            var cellFormats = new CellFormats() { Count = 3U };
            var cellFormatFont = new CellFormat() { NumberFormatId = 0U, FontId = 0U, FillId = 0U, BorderId = 0U, FormatId = 0U, ApplyFont = true };
            var cellFormatFontAndBorder = new CellFormat() { NumberFormatId = 0U, FontId = 0U, FillId = 0U, BorderId = 1U, FormatId = 0U, ApplyFont = true, ApplyBorder = true };
            var cellFormatTitle = new CellFormat() { NumberFormatId = 0U, FontId = 1U, FillId = 0U, BorderId = 0U, FormatId = 0U, Alignment = new Alignment() { Vertical = VerticalAlignmentValues.Center, WrapText = true, Horizontal = HorizontalAlignmentValues.Center }, ApplyFont = true };

            cellFormats.Append(cellFormatFont);
            cellFormats.Append(cellFormatFontAndBorder);
            cellFormats.Append(cellFormatTitle);

            var cellStyles = new CellStyles() { Count = 1U };

            cellStyles.Append(new CellStyle() { Name = "Normal", FormatId = 0U, BuiltinId = 0U });

            var differentialFormats = new DocumentFormat.OpenXml.Office2013.Excel.DifferentialFormats() { Count = 0U };

            var tableStyles = new TableStyles() { Count = 0U, DefaultTableStyle = "TableStyleMedium2", DefaultPivotStyle = "PivotStyleLight16" };

            var stylesheetExtensionList = new StylesheetExtensionList();

            var stylesheetExtension1 = new StylesheetExtension() { Uri = "{EB79DEF2-80B8-43e5-95BD-54CBDDF9020C}" };
            stylesheetExtension1.AddNamespaceDeclaration("x14", "http://schemas.microsoft.com/office/spreadsheetml/2009/9/main");
            stylesheetExtension1.Append(new SlicerStyles() { DefaultSlicerStyle = "SlicerStyleLight1" });

            var stylesheetExtension2 = new StylesheetExtension() { Uri = "{9260A510-F301-46a8-8635-F512D64BE5F5}" };
            stylesheetExtension2.AddNamespaceDeclaration("x15", "http://schemas.microsoft.com/office/spreadsheetml/2010/11/main");
            stylesheetExtension2.Append(new TimelineStyles() { DefaultTimelineStyle = "TimeSlicerStyleLight1" });

            stylesheetExtensionList.Append(stylesheetExtension1);
            stylesheetExtensionList.Append(stylesheetExtension2);

            sp.Stylesheet.Append(fonts);
            sp.Stylesheet.Append(fills);
            sp.Stylesheet.Append(borders);
            sp.Stylesheet.Append(cellStyleFormats);
            sp.Stylesheet.Append(cellFormats);
            sp.Stylesheet.Append(cellStyles);
            sp.Stylesheet.Append(differentialFormats);
            sp.Stylesheet.Append(tableStyles);
            sp.Stylesheet.Append(stylesheetExtensionList);
        }

        private static uint GetStyleValue(ExcelStyleInfoType styleInfo)
        {
            return styleInfo switch
            {
                ExcelStyleInfoType.Title => 2U,
                ExcelStyleInfoType.TextWithBorder => 1U,
                ExcelStyleInfoType.Text => 0U,
                _ => 0U,
            };
        }

        protected override void CreateExcel(ExcelInfo info)
        {
            _spreadsheetDocument = SpreadsheetDocument.Create(info.FileName, SpreadsheetDocumentType.Workbook);
            // Создаем книгу (в ней хранятся листы)
            var workbookpart = _spreadsheetDocument.AddWorkbookPart();
            workbookpart.Workbook = new Workbook();

            CreateStyles(workbookpart);

            // Получаем/создаем хранилище текстов для книги
            _shareStringPart = _spreadsheetDocument.WorkbookPart!.GetPartsOfType<SharedStringTablePart>().Any()
                ? _spreadsheetDocument.WorkbookPart.GetPartsOfType<SharedStringTablePart>().First()
                : _spreadsheetDocument.WorkbookPart.AddNewPart<SharedStringTablePart>();

            // Создаем SharedStringTable, если его нет
            if (_shareStringPart.SharedStringTable == null)
            {
                _shareStringPart.SharedStringTable = new SharedStringTable();
            }

            // Создаем лист в книгу
            var worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
            worksheetPart.Worksheet = new Worksheet(new SheetData());

            // Добавляем лист в книгу
            var sheets = _spreadsheetDocument.WorkbookPart.Workbook.AppendChild(new Sheets());
            var sheet = new Sheet()
            {
                Id = _spreadsheetDocument.WorkbookPart.GetIdOfPart(worksheetPart),
                SheetId = 1,
                Name = "Лист"
            };
            sheets.Append(sheet);

            _worksheet = worksheetPart.Worksheet;
        }

        protected override void InsertCellInWorksheet(ExcelCellParameters excelParams)
        {
            if (_worksheet == null || _shareStringPart == null)
            {
                return;
            }
            var sheetData = _worksheet.GetFirstChild<SheetData>();
            if (sheetData == null)
            {
                return;
            }

            // Ищем строку, либо добавляем ее
            Row row;
            if (sheetData.Elements<Row>().Where(r => r.RowIndex! == excelParams.RowIndex).Any())
            {
                row = sheetData.Elements<Row>().Where(r => r.RowIndex! == excelParams.RowIndex).First();
            }
            else
            {
                row = new Row() { RowIndex = excelParams.RowIndex };
                sheetData.Append(row);
            }

            // Ищем нужную ячейку  
            Cell cell;
            if (row.Elements<Cell>().Where(c => c.CellReference!.Value == excelParams.CellReference).Any())
            {
                cell = row.Elements<Cell>().Where(c => c.CellReference!.Value == excelParams.CellReference).First();
            }
            else
            {
                // Все ячейки должны быть последовательно друг за другом расположены
                // нужно определить, после какой вставлять
                Cell? refCell = null;
                foreach (Cell rowCell in row.Elements<Cell>())
                {
                    if (string.Compare(rowCell.CellReference!.Value, excelParams.CellReference, true) > 0)
                    {
                        refCell = rowCell;
                        break;
                    }
                }

                var newCell = new Cell() { CellReference = excelParams.CellReference };
                row.InsertBefore(newCell, refCell);

                cell = newCell;
            }

            // вставляем новый текст
            _shareStringPart.SharedStringTable.AppendChild(new SharedStringItem(new Text(excelParams.Text)));
            _shareStringPart.SharedStringTable.Save();

            cell.CellValue = new CellValue((_shareStringPart.SharedStringTable.Elements<SharedStringItem>().Count() - 1).ToString());
            cell.DataType = new EnumValue<CellValues>(CellValues.SharedString);
            cell.StyleIndex = GetStyleValue(excelParams.StyleInfo);
        }

        protected override void MergeCells(ExcelMergeParameters excelParams)
        {
            if (_worksheet == null)
            {
                return;
            }
            MergeCells mergeCells;

            if (_worksheet.Elements<MergeCells>().Any())
            {
                mergeCells = _worksheet.Elements<MergeCells>().First();
            }
            else
            {
                mergeCells = new MergeCells();

                if (_worksheet.Elements<CustomSheetView>().Any())
                {
                    _worksheet.InsertAfter(mergeCells, _worksheet.Elements<CustomSheetView>().First());
                }
                else
                {
                    _worksheet.InsertAfter(mergeCells, _worksheet.Elements<SheetData>().First());
                }
            }

            var mergeCell = new MergeCell()
            {
                Reference = new StringValue(excelParams.Merge)
            };
            mergeCells.Append(mergeCell);
        }

        protected override void SaveExcel(ExcelInfo info)
        {
            if (_spreadsheetDocument == null)
            {
                return;
            }
            _spreadsheetDocument.WorkbookPart!.Workbook.Save();
            _spreadsheetDocument.Dispose();
        }
    }
}