public DataTable CheckPreviousGPXTrackPoints(int UserId, int SchoolId, int ClassId, DataTable dtNew)
{
DataTable result = new DataTable();
int similarrows = 0;
bool IsOverlapping = false;
DataTable dtPrv = objStudent.GetGpxTractPoints(UserId, Convert.ToInt32(Session["UserRoleId"]), ClassId);
if (dtPrv.Rows.Count > 0)
{
for (int i = 0; i < dtPrv.Rows.Count; i++)
{
DataRow[] _dr;
_dr = dtNew.Select("Lat='" + dtPrv.Rows[i]["lat"].ToString() + "' AND Lon='" +
dtPrv.Rows[i]["lon"].ToString() + "' AND Time='" + dtPrv.Rows[i]["TrackTime"].ToString() + "'");
if (_dr.Length != 0)
{
int oldRows = 0;
if (dtPrv.Rows[i]["TrackPointCount"].ToString() != "")
{
oldRows = Convert.ToInt32(dtPrv.Rows[i]["TrackPointCount"]);
}
int newRows = dtNew.Rows.Count;
if (newRows > oldRows)
{
for (int j = 0; j < (newRows - (newRows - oldRows)) - 1; j++)
{
dtNew.Rows[0].Delete();
}
result = dtNew;
for (int j = 0; j < dtPrv.Rows.Count; j++)
{
DataRow[] _drNew;
_drNew = dtNew.Select("Lat='" + dtPrv.Rows[j]["lat"].ToString() + "' AND Lon='" + dtPrv.Rows[j]["lon"].ToString() + "' AND Time='" + dtPrv.Rows[j]["TrackTime"].ToString() + "'");
if (_drNew.Length != 0)
{
result = new DataTable();
break;
}
}
}
break;
}
else
{
if (!objStudent.CheckGPXFile(dtNew, ClassId, UserId))
{
dtNew.Clear();
return(dtNew);
}
result = dtNew;
}
}
}
else
{
if (!objStudent.CheckGPXFile(dtNew, ClassId, UserId))
{
dtNew.Clear();
return(dtNew);
}
result = dtNew;
}
return(result);
}