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public class ExcelHelper { /// <summary> /// ����Excel��Sheet����DataTable /// </summary> /// <param name="filePath">Excel�ļ���ַ</param> /// <param name="sheetIndex">Sheet����</param> /// <returns>DataTable</returns> public static DataTable GetDataTable(string filePath, int sheetIndex) { return GetDataSet(filePath, sheetIndex).Tables[0]; } /// <summary> /// ����Excel����DataSet /// </summary> /// <param name="filePath">Excel�ļ���ַ</param> /// <param name="sheetIndex">Sheet��������ѡ��Ĭ�Ϸ�������Sheet</param> /// <returns>DataSet</returns> public static DataSet GetDataSet(string filePath, int? sheetIndex = null) { DataSet ds = new DataSet(); IWorkbook fileWorkbook; using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read)) { if (filePath.Last() == 's') { try { fileWorkbook = new HSSFWorkbook(fs); } catch (Exception ex) { throw ex; } } else { try { fileWorkbook = new XSSFWorkbook(fs); } catch { fileWorkbook = new HSSFWorkbook(fs); } } } for (int i = 0; i < fileWorkbook.NumberOfSheets; i++) { if (sheetIndex != null && sheetIndex != i) continue; DataTable dt = new DataTable(); ISheet sheet = fileWorkbook.GetSheetAt(i); //��ͷ IRow header = sheet.GetRow(sheet.FirstRowNum); List<int> columns = new List<int>(); for (int j = 0; j < header.LastCellNum; j++) { object obj = GetValueTypeForXLS(header.GetCell(j) as HSSFCell); if (obj == null || obj.ToString() == string.Empty) { dt.Columns.Add(new DataColumn("Columns" + j.ToString())); } else dt.Columns.Add(new DataColumn(obj.ToString())); columns.Add(j); } //���� IEnumerator rows = sheet.GetEnumerator(); while (rows.MoveNext()) { int j = sheet.FirstRowNum + 1; DataRow dr = dt.NewRow(); bool hasValue = false; foreach (int K in columns) { dr[K] = GetValueTypeForXLS(sheet.GetRow(K).GetCell(K) as HSSFCell); if (dr[K] != null && dr[K].ToString() != string.Empty) { hasValue = true; } } if (hasValue) { dt.Rows.Add(dr); } j++; } ds.Tables.Add(dt); } return ds; } /// <summary> /// ����DataTable����Excel /// </summary> /// <param name="dt">DataTable</param> /// <param name="file">�����ַ</param> public static void GetExcelByDataTable(DataTable dt, string file) { DataSet ds = new DataSet(); ds.Tables.Add(dt); GetExcelByDataSet(ds, file); } /// <summary> /// ����DataSet����Excel /// </summary> /// <param name="ds">DataSet</param> /// <param name="file">�����ַ</param> public static void GetExcelByDataSet(DataSet ds, string file) { IWorkbook fileWorkbook = new HSSFWorkbook(); int index = 0; foreach (DataTable dt in ds.Tables) { index++; ISheet sheet = fileWorkbook.CreateSheet("Sheet" + index); //��ͷ IRow row = sheet.CreateRow(0); for (int i = 0; i < dt.Columns.Count; i++) { ICell cell = row.CreateCell(i); cell.SetCellValue(dt.Columns[i].ColumnName); } //���� for (int i = 0; i < dt.Rows.Count; i++) { IRow row1 = sheet.CreateRow(i + 1); for (int j = 0; j < dt.Columns.Count; j++) { ICell cell = row1.CreateCell(j); cell.SetCellValue(dt.Rows[i][j].ToString()); } } } //תΪ�ֽ����� MemoryStream stream = new MemoryStream(); fileWorkbook.Write(stream); var buf = stream.ToArray(); //����ΪExcel�ļ� using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write)) { fs.Write(buf, 0, buf.Length); fs.Flush(); } } /// <summary> /// ���ݵ�Ԫ�����ݷ���Ϊ��Ӧ���͵����� /// </summary> /// <param name="cell">��Ԫ��</param> /// <returns>����</returns> private static object GetValueTypeForXLS(HSSFCell cell) { if (cell == null) return null; switch (cell.CellType) { case CellType.Blank: //BLANK: return null; case CellType.Boolean: //BOOLEAN: return cell.BooleanCellValue; case CellType.Numeric: //NUMERIC: return cell.NumericCellValue; case CellType.String: //STRING: return cell.StringCellValue; case CellType.Error: //ERROR: return cell.ErrorCellValue; case CellType.Formula: //FORMULA: default: return "=" + cell.CellFormula; } } }
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