NPOI version 2.2.0.0 download address: https://github.com/dotnetcore/NPOI
Reference: NPOI.dll
using NPOI.HSSF.UserModel; using NPOI.SS.UserModel; using NPOI.SS.Util; using System.Data; using System.IO; namespace Demo.Code.Excel { public class NPOIExcel { private string _title; private string _sheetName; private string _filePath; /// <summary> /// Export to Excel /// </summary> /// <param name="table"></param> /// <returns></returns> public bool ToExcel(DataTable table) { FileStream fs = new FileStream(this._filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite); IWorkbook workBook = new HSSFWorkbook(); this._sheetName = this._sheetName.IsEmpty() ? "sheet1" : this._sheetName; ISheet sheet = workBook.CreateSheet(this._sheetName); // handle table title IRow row = sheet.CreateRow(0); row.CreateCell(0).SetCellValue(this._title); sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, table.Columns.Count - 1)); row.Height = 500; ICellStyle cellStyle = workBook.CreateCellStyle(); IFont font = workBook.CreateFont(); font.FontName = "Microsoft Yahei"; font.FontHeightInPoints = 17; cellStyle.SetFont(font); cellStyle.VerticalAlignment = VerticalAlignment.Center; cellStyle.Alignment = HorizontalAlignment.Center; row.Cells[0].CellStyle = cellStyle; // handle table column headers row = sheet.CreateRow(1); for (int i = 0; i < table.Columns.Count; i++) { row.CreateCell(i).SetCellValue(table.Columns[i].ColumnName); row.Height = 350; sheet.AutoSizeColumn(i); } // process data content for (int i = 0; i < table.Rows.Count; i++) { row = sheet.CreateRow(2 + i); row.Height = 250; for (int j = 0; j < table.Columns.Count; j++) { row.CreateCell(j).SetCellValue(table.Rows[i][j].ToString()); sheet.SetColumnWidth(j, 256 * 15); } } // write data stream workBook.Write(fs); fs.Flush(); fs.Close(); return true; } /// <summary> /// Export to Excel /// </summary> /// <param name="table"></param> /// <param name="title"></param> /// <param name="sheetName"></param> /// <returns></returns> public bool ToExcel(DataTable table, string title, string sheetName, string filePath) { this._title = title; this._sheetName = sheetName; this._filePath = filePath; return ToExcel(table); } } }