读取Excel中的数据到DataSet

  1         /// <summary>
  2         /// 读取Excel
  3         /// </summary>
  4         /// <param name="filePath">路径</param>
  5         /// <param name="startRow">每个表格从多少行开始 格式：["",""]</param>
  6         /// <returns></returns>
  7         public static DataSet ReadExcel(string filePath, string[] startRow)
  8         {
  9             IWorkbook book = null;
 10             // XSSFWorkbook book = null;
 11             DataSet ds = new DataSet();
 12             string excelType = "";
 13             string str = filePath.Substring(filePath.LastIndexOf(‘.‘) + 1);
 14             if (str == "xlsx")
 15                 excelType = "xlsx";
 16             else if (str == "xls")
 17                 excelType = "xls";
 18             else
 19                 throw new Exception("Excel格式不正确");
 20             try
 21             {
 22                 using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
 23                 {
 24                     if (excelType == "xlsx")
 25                         book = new XSSFWorkbook(file);
 26                     else
 27                         book = new HSSFWorkbook(file);
 28 
 29                     for (int a = 0; a < book.NumberOfSheets; a++)
 30                     {
 31                         ISheet sheet = (ISheet)book.GetSheetAt(a);
 32                         int sheetRowsCount = sheet.LastRowNum;
 33 
 34                         int row = 0;
 35                         if (startRow != null)
 36                         {
 37                             if (startRow.Length >= a)
 38                                 row = int.Parse(startRow[a]);
 39                         }
 40 
 41                         IRow iRow = (IRow)sheet.GetRow(row);
 42                         DataTable dt = new DataTable();
 43 
 44                         if (sheet.GetRow(row) == null)
 45                             return ds;
 46                         for (int i = 0; i < (sheet.GetRow(row).LastCellNum); i++)
 47                         {
 48                             object obj = GetValueType(iRow.GetCell(i) as ICell);
 49                             if (obj == null || obj.ToString() == string.Empty)
 50                                 dt.Columns.Add(new DataColumn("Columns" + i.ToString().Trim()));
 51                             else
 52                                 dt.Columns.Add(new DataColumn(obj.ToString().Trim()));
 53                         }
 54                         for (int i = row + 1; i <= sheetRowsCount; i++)
 55                         {
 56                             DataRow dr = dt.NewRow();
 57                             IRow ro = (IRow)sheet.GetRow(i);
 58                             for (int j = 0; j < ro.LastCellNum; j++)
 59                             {
 60                                 dr[j] = GetValueType(sheet.GetRow(i).GetCell(j) as ICell);
 61                             }
 62                             dt.Rows.Add(dr);
 63                         }
 64                         dt.TableName = sheet.SheetName;
 65                         ds.Tables.Add(dt);
 66                     }
 67                     return ds;
 68                 }
 69             }
 70             catch (Exception e)
 71             {
 72                 throw new Exception(e.Message);
 73             }
 74         }
 75 
 76         /// <summary>  
 77         /// 获取单元格类型(xls)  
 78         /// </summary>  
 79         /// <param name="cell"></param>  
 80         /// <returns></returns>  
 81         private static object GetValueType(ICell cell)
 82         {
 83             if (cell == null)
 84                 return null;
 85             switch (cell.CellType)
 86             {
 87                 case CellType.BLANK: //BLANK:  
 88                     return null;
 89                 case CellType.BOOLEAN: //BOOLEAN:  
 90                     return cell.BooleanCellValue;
 91                 case CellType.NUMERIC: //NUMERIC:
 92                     short format = cell.CellStyle.DataFormat;
 93                     if (format == 14 || format == 31 || format == 57 || format == 58)
 94                     {
 95                         return cell.DateCellValue.ToString("yyy-MM-dd");
 96                     }
 97                     else
 98                     {
 99                         return cell.NumericCellValue;
100                     }
101                 case CellType.STRING: //STRING:  
102                     return cell.StringCellValue;
103                 case CellType.ERROR: //ERROR:  
104                     return cell.ErrorCellValue;
105                 case CellType.FORMULA: //FORMULA:  
106                 default:
107                     return "=" + cell.CellFormula;
108             }
109         }