上传读取Excel文件数据

        /// <summary>
        /// 上传读取Excel文件数据
        /// 来自http://www.cnblogs.com/cielwater
        /// </summary>
        /// <param name="form"></param>
        /// <returns></returns>
        public ActionResult AreaExcelFile(FormCollection form)
        {
            HttpPostedFileBase fileField = Request.Files["fileField"];
            string path = Server.MapPath("~/Excel");
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            string flieName = fileField.FileName;
            string fileExt = Path.GetExtension(flieName).ToLower().Substring(1);
            //验证是否为Excel文件
            if (fileExt != "xls" && fileExt != "xlsx")
            {
                ModelState.AddModelError("file", "您选择的不是Excel文件");
                return View("ExcelFile");
            }
            string FileName = path + flieName.Substring(flieName.LastIndexOf("\"));
            fileField.SaveAs(FileName);
            //读取excel文件，转换成dataset
            string strConn = "";
            if (fileExt == "xls")
            {
                strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + FileName + ";Extended Properties=Excel 8.0;";
            }
            else if (fileExt == "xlsx")
            {
                strConn = "Provider= Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'";
            }
            DataSet ds = new DataSet();
            using (OleDbConnection conn = new OleDbConnection(strConn))
            {
                conn.Open();
                //获取Excel表结构
                System.Data.DataTable sTable = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);
                conn.Dispose();
                //遍历Excel文件所有表
                foreach (DataRow ExcelTable in sTable.Rows)
                {
                    //读取表
                    OleDbDataAdapter oada = new OleDbDataAdapter("select * from [" + ExcelTable[2] + "]", strConn);
                    //写入DataSet
                    oada.Fill(ds);
                    //后面直接处理ds中的数据则可以
                }
            }
        }