/// <summary>
        /// Excel->DataTable
        /// </summary>
        /// <param name="filePath">Excel文件路径</param>
        public static DataTable ReadExcel(string filePath)
        {
            IWorkbook iwkX;
            using (FileStream fs = File.Open(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
            {
                iwkX = WorkbookFactory.Create(fs);
                fs.Close();
            }
            //sheet
            DataTable dt = new DataTable();
            for (int h = 0; h < iwkX.NumberOfSheets; h++)
            {
                ISheet sheet = iwkX.GetSheetAt(h);
                var rows = sheet.GetRowEnumerator();
                bool isMove = rows.MoveNext();
                //循环sheet
                if (isMove)
                {
                    var Cols = (IRow)rows.Current;
                    dt.TableName = sheet.SheetName;
                    for (int i = 0; i < Cols.LastCellNum; i++)
                    {
                        string str = Cols.GetCell(i).ToString();
                        dt.Columns.Add(Cols.GetCell(i).ToString());
                    }
                    while (rows.MoveNext())
                    {
                        var row = (IRow)rows.Current;
                        var dr = dt.NewRow();
                        for (int i = 0; i < row.LastCellNum; i++)
                        {
                            var cell = row.GetCell(i);
                            if (cell == null)
                            {
                                dr[i] = "";
                            }
                            else
                            {
                                string strdr = cell.ToString();
                                dr[i] = cell.ToString();
                            }
                        }
                        dt.Rows.Add(dr);
                    }
                }
            }

            return dt;
        }