public DataTable CheckPreviousGPX(int UserId, int SchoolId, int ClassId, DataTable dtNew) { // Check if the same file is previously uploaded // and if there are updated trackpoints in file DataTable result = new DataTable(); DataTable dtPrv = objStudent.GetPreviousUploadedFile(UserId, UserRoleId); if (dtPrv.Rows.Count > 0) { for (int i = 0; i < dtPrv.Rows.Count; i++) { string FilePath = ConfigurationManager.AppSettings["GPXWebPath"].ToString() + SchoolId.ToString() + "/" + ClassId.ToString() + "/" + UserId.ToString() + "/" + dtPrv.Rows[i]["FileName"].ToString(); if (File.Exists(FilePath)) { DataTable dtOld = new DataTable(); dtOld = LoadGPXWaypoints(FilePath); if (dtOld.Rows.Count > 1 && dtNew.Rows.Count > 1) { int similarrows = MatchingFile(dtOld, dtNew); if (similarrows > 0) { int oldRows = dtOld.Rows.Count; int newRows = dtNew.Rows.Count; if (newRows > oldRows) { for (int j = 0; j < (newRows - oldRows) - 1; j++) { dtNew.Rows[0].Delete(); } result = dtNew; } break; } else { result = dtNew; } } } else { result = dtNew; } } } else { result = dtNew; } return(result); }