private string Mapn()
{
DataTable dt = bll.LoadPN();
if (dt.Rows.Count == 0)
{
return("PN01");
}
else
{
string a = dt.Rows[0][0].ToString();
int mamax = int.Parse(a.Substring(2, a.Length - 2));
for (int i = 0; i < dt.Rows.Count; i++)
{
string b = dt.Rows[i][0].ToString();
int ma = int.Parse(b.Substring(2, b.Length - 2));
if (ma > mamax)
{
mamax = ma;
}
}
return("PN0" + (mamax + 1).ToString());
}
}