Uploading CSV file using MVC 3 in C#

Here is code for file upload in MVC

public ActionResult ImageUpload(HttpPostedFileBase FileUpload)
         {
              DirectoryInfo dir = new DirectoryInfo(Server.MapPath("~/EventImages"));
              FileInfo[] file = dir.GetFiles();
   
              int x = file.Length;
              x++;
              if (ModelState.IsValid)
              {
                  if (FileUpload.ContentLength > 0 && FileUpload.ContentType == "image/jpeg")
                  {
                      string fileExtention = Path.GetExtension(FileUpload.FileName);
                      string fileName = Convert.ToString(x) + fileExtention;               
                      string path = Path.Combine(Server.MapPath("~/EventImages"), fileName);
                      string dbPath = "~/EventImages/"+ fileName;
                      try
                      {
                          person = new Person();
                          FileUpload.SaveAs(path);
                          
                          dt = ProcessCSV(path);
                          ViewData["Feedback"] = "Upload Complete!";
                      }
                      catch (Exception ex)
                      {
                          ViewData["Feedback"] = ex.Message;
                      }
                  }
              }
          }

private static DataTable ProcessCSV(string fileName)
             {
                 
                 string Feedback = string.Empty;
                 string line = string.Empty;
                 string[] strArray;
                 DataTable dt = new DataTable();
                 DataRow row;
                 
                Regex r = new Regex(",(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))");
                
                StreamReader sr = new StreamReader(fileName);
     
                
                line = sr.ReadLine();
                strArray = r.Split(line);
     
                
                Array.ForEach(strArray, s => dt.Columns.Add(new DataColumn()));
     
                
                while ((line = sr.ReadLine()) != null)
                {
                    row = dt.NewRow();
     
                
                    row.ItemArray = r.Split(line);
                    dt.Rows.Add(row);
                }
     sr.Dispose();
     return dt;
     
            }