.Net中读取xls\xlsx格式的Excel文件

  ///<summary>
        ///读取xls\xlsx格式的Excel文件,add by Rain 重写读取上传excel文档方法 2014-07-01
        ///</ummary>
        ///<param name="path">待读取Excel的全路径</param>
        ///<returns></returns>
        private DataTable ReadExcelToTable(string path)
        {
            //连接字符串
            //string connstring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';";  // Office 07及以上版本不能出现多余的空格 而且分号注意
            string connstring = "Provider=Microsoft.JET.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';"; 
            //Office 07以下版本

            using (OleDbConnection conn = new OleDbConnection(connstring))
            {
                conn.Open();
                DataTable sheetsName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });  //得到所有sheet的名字   
                string firstSheetName = sheetsName.Rows[0][2].ToString();   //得到第一个sheet的名字   
                string sql = string.Format("SELECT * FROM [{0}]", firstSheetName);  //查询字符串    
                OleDbDataAdapter ada = new OleDbDataAdapter(sql, connstring);
                DataSet set = new DataSet();
                ada.Fill(set);
                return set.Tables[0];
            }
        }