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();
             //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[] + "]", strConn);
                     //写入DataSet
                     oada.Fill(ds);
                     //后面直接处理ds中的数据则可以
                 }
             }
         }