/// <summary>
			/// 2007版Excel
			/// </summary>
			/// <param name="file"></param>
			/// <returns></returns>
		public static DataTable ExcelToTableForXLSX(string file)
		{
			DataTable dt = new DataTable();
			using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
			{
				NPOI.XSSF.UserModel.XSSFWorkbook xssfworkbook = new NPOI.XSSF.UserModel.XSSFWorkbook(fs);
				NPOI.SS.UserModel.ISheet sheet = xssfworkbook.GetSheetAt(0);

				//表頭  
				NPOI.SS.UserModel.IRow header = sheet.GetRow(sheet.FirstRowNum);
				List<int> columns = new List<int>();
				for (int i = 0; i < header.LastCellNum; i++)
				{
					object obj = GetValueTypeForXLSX(header.GetCell(i) as NPOI.XSSF.UserModel.XSSFCell);
					if (obj == null || obj.ToString() == string.Empty)
					{
						dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
						//continue;  
					}
					else
						dt.Columns.Add(new DataColumn(obj.ToString()));
					columns.Add(i);
				}
				//資料  
				for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
				{
					DataRow dr = dt.NewRow();
					bool hasValue = false;
					foreach (int j in columns)
					{
						dr[j] = GetValueTypeForXLSX(sheet.GetRow(i).GetCell(j) as NPOI.XSSF.UserModel.XSSFCell);
						if (dr[j] != null && dr[j].ToString() != string.Empty)
						{
							hasValue = true;
						}
					}
					if (hasValue)
					{
						dt.Rows.Add(dr);
					}
				}
			}
			return dt;
		}

		/// <summary>  
		/// 獲取單元格型別(xlsx)  
		/// </summary>  
		/// <param name="cell"></param>  
		/// <returns></returns>  
		private static object GetValueTypeForXLSX(XSSFCell 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;
			}
		}

		/// <summary>  
		/// 將Excel檔案中的資料讀出到DataTable中(xls)  
		/// </summary>  
		/// <param name="file"></param>  
		/// <returns></returns>  
		public static DataTable ExcelToTableForXLS(string file)
		{
			DataTable dt = new DataTable();
			using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
			{
				HSSFWorkbook hssfworkbook = new HSSFWorkbook(fs);
				ISheet sheet = hssfworkbook.GetSheetAt(0);

				//表頭  
				IRow header = sheet.GetRow(sheet.FirstRowNum);
				List<int> columns = new List<int>();
				for (int i = 0; i < header.LastCellNum; i++)
				{
					object obj = GetValueTypeForXLS(header.GetCell(i) as HSSFCell);
					if (obj == null || obj.ToString() == string.Empty)
					{
						dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
						//continue;  
					}
					else
						dt.Columns.Add(new DataColumn(obj.ToString()));
					columns.Add(i);
				}
				//資料  
				for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
				{
					DataRow dr = dt.NewRow();
					bool hasValue = false;
					foreach (int j in columns)
					{
						dr[j] = GetValueTypeForXLS(sheet.GetRow(i).GetCell(j) as HSSFCell);
						if (dr[j] != null && dr[j].ToString() != string.Empty)
						{
							hasValue = true;
						}
					}
					if (hasValue)
					{
						dt.Rows.Add(dr);
					}
				}
			}
			return dt;
		}

		/// <summary>  
		/// 獲取單元格型別(xls)  
		/// </summary>  
		/// <param name="cell"></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;
			}
		}