/// <summary>

        /// 读取Excel中数据

        /// </summary>

        /// <param name="strExcelPath"></param>

        /// <param name="tableName"></param>

        /// <returns></returns>

        public static DataTable GetExcelTableByOleDB(string strExcelPath, string tableName)

        {

            try

            {

                DataTable dtExcel = new DataTable();

                //数据表

                DataSet ds = new DataSet();

                //获取文件扩展名

                string strExtension = System.IO.Path.GetExtension(strExcelPath);

                string strFileName = System.IO.Path.GetFileName(strExcelPath);

                //Excel的连接

                OleDbConnection objConn = null;

                switch (strExtension)

                {

                    case ".xls":

                        objConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strExcelPath + ";" + "Extended Properties=\"Excel 8.0;HDR=yes;IMEX=1;\"");

                        break;

                    case ".xlsx":

                        objConn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + strExcelPath + ";" + "Extended Properties=\"Excel 12.0;HDR=yes;IMEX=1;\"");//此连接可以操作.xls与.xlsx文件 (支持Excel2003 和 Excel2007 的连接字符串)  备注： "HDR=yes;"是说Excel文件的第一行是列名而不是数，"HDR=No;"正好与前面的相反。"IMEX=1 "如果列中的数据类型不一致，使用"IMEX=1"可必免数据类型冲突。

                        break;

                    default:

                        objConn = null;

                        break;

                }

                if (objConn == null)

                {

                    return null;

                }

                objConn.Open();

                //获取Excel中所有Sheet表的信息

                //System.Data.DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);

                //获取Excel的第一个Sheet表名

                // string tableName1 = schemaTable.Rows[0][2].ToString().Trim();

                string strSql = "select * from [" + tableName + "$]";

                //获取Excel指定Sheet表中的信息

                OleDbCommand objCmd = new OleDbCommand(strSql, objConn);

                OleDbDataAdapter myData = new OleDbDataAdapter(strSql, objConn);

                myData.Fill(ds, tableName);//填充数据

                objConn.Close();

                //dtExcel即为excel文件中指定表中存储的信息

                dtExcel = ds.Tables[tableName];

                return dtExcel;

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.Message + "\r\n" + ex.StackTrace);

                return null;

            }

        }

string excelFilePath = @"C:\Users\Administrator\Desktop\OpQuoteDefinition\ExcelOLEDBopDemo\bin\Debug\20171102价格导入表格物料信息.xls";

string excelSheetName = @"Sheet1";

DataTable tb= GetExcelTableByOleDB(excelFilePath, excelSheetName);