protected void Page_Load(object sender, EventArgs e)
        {
            string Cus = "C";
            string FULLCusID;
            string CutCusID;
            int    CUSID;
            int    newCUSID;
            string TransCUSID;
            string NewFullID;

            string    findCus = "SELECT MAX(CusID) AS MAXCUS FROM Customers ;";
            DataTable dt3     = dbconn.QueryExecuteScalar(findCus);

            try
            {
                FULLCusID  = dt3.Rows[0]["MAXCUS"].ToString();
                CutCusID   = FULLCusID.Substring(1, 4);
                CUSID      = Convert.ToInt32(CutCusID);
                newCUSID   = CUSID + 1;
                TransCUSID = newCUSID.ToString("0000");
                NewFullID  = Cus + TransCUSID;
                lblID.Text = NewFullID;
            }
            catch
            {
                NewFullID  = "C0001";
                lblID.Text = NewFullID;
            }
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            /*
             * /////////////// Case INV-550001/////////////////////////
             * string PreCode = "INV-";
             * int cutDBYEAR;
             * string currentYear;
             * int newCode;
             * string newcodewithform;
             * string SubYear;
             * string Newfullcode;
             * string fullFormatDB;
             * string cutYearDB;
             * int cutCurYear;
             * string oldcode;
             * string SuboldCode;
             * int convertOldcode;
             *
             * string findmax = "SELECT MAX(Test_ID) as MAXID FROM test;";
             * DataTable dt = dbconn.QueryExecuteScalar(findmax);
             * try
             * {
             *  if (dt.Rows.Count == 0)
             *  {
             *      SubYear = DateTime.Now.Year.ToString();
             *      currentYear = SubYear.Substring(2, 2).ToString();
             *      newCode = 1;
             *      newcodewithform = newCode.ToString("0000");
             *
             *      Newfullcode = PreCode + currentYear + newcodewithform;
             *      TextBox1.Text = Newfullcode;
             *      //return Newfullcode;
             *  }
             *  else if (dt.Rows.Count > 0)
             *  {
             *      fullFormatDB = Convert.ToString(dt.Rows[0]["MAXID"]);
             *      cutYearDB = fullFormatDB.Substring(4, 2).ToString();
             *      cutDBYEAR = Convert.ToInt32(cutYearDB);
             *
             *      SubYear = DateTime.Now.Year.ToString();
             *      currentYear = SubYear.Substring(2, 2).ToString();
             *      cutCurYear = Convert.ToInt32(currentYear);
             *
             *
             *      // yearNow = Convert.ToInt32(DateTime.Now.Year);
             *      if (cutCurYear > cutDBYEAR)
             *      {
             *
             *
             *          newCode = 1;
             *          newcodewithform = newCode.ToString("0000");
             *          Newfullcode = PreCode + cutCurYear + newcodewithform;
             *          TextBox1.Text = Newfullcode;
             *      }
             *      else // case yeardb == curYear
             *      {
             *          oldcode = dt.Rows[0]["MAXID"].ToString();
             *          SuboldCode = oldcode.Substring(6, 4).ToString();
             *          convertOldcode = Convert.ToInt32(SuboldCode);
             *          newCode = convertOldcode + 1;
             *          newcodewithform = newCode.ToString("0000");
             *          Newfullcode = PreCode + cutCurYear + newcodewithform;
             *          TextBox1.Text = Newfullcode;
             *      }
             *
             *
             *  }
             *  dbconn.Close();
             *
             * }
             * catch
             * {
             *  SubYear = DateTime.Now.Year.ToString();
             *  currentYear = SubYear.Substring(2, 2).ToString();
             *  newCode = 1;
             *  newcodewithform = newCode.ToString("0000");
             *
             *  Newfullcode = PreCode + currentYear + newcodewithform;
             *  TextBox1.Text = Newfullcode;
             * }
             */
            /////Case PK Name of code is more than 1 Style of Value Ex  MD001 , HR001  and Working by Select Value from dropdown list then Value of Code will show on textbox //////

            /* string Post = DropDownList1.SelectedValue;
             * string FindMAXID;
             * string CurPostID;
             * string CutCurPostID;
             * int IDNOW;
             * int newID;
             * string TransID;
             * string FullNewID;
             * FindMAXID = "SELECT MAX(TEST2_ID) as MAXEMPID FROM TEST2 WHERE TEST2_ID like '%"+Post+"%';";
             *
             * DataTable dt2 = dbconn.QueryExecuteScalar(FindMAXID);
             * try
             * {
             *   if (dt2.Rows.Count > 0)
             *   {
             *       CurPostID = dt2.Rows[0]["MAXEMPID"].ToString();
             *       CutCurPostID = CurPostID.Substring(2, 4);
             *       IDNOW = Convert.ToInt32(CutCurPostID);
             *       newID = IDNOW + 1;
             *       TransID = newID.ToString("0000");
             *       FullNewID = Post + TransID;
             *       TextBox2.Text = FullNewID.ToString();
             *   }
             * }
             * catch
             * {
             *   FullNewID = Post + "0001";
             *   TextBox2.Text = FullNewID;
             * }
             * dbconn.Close();
             */
            ////////Alpabet+Num Code EX C0001////////////
            string Cus = "C";
            string FULLCusID;
            string CutCusID;
            int    CUSID;
            int    newCUSID;
            string TransCUSID;
            string NewFullID;

            string    findCus = "SELECT MAX(Cus_ID) AS MAXCUS FROM Customer ;";
            DataTable dt3     = dbconn.QueryExecuteScalar(findCus);

            try
            {
                FULLCusID     = dt3.Rows[0]["MAXCUS"].ToString();
                CutCusID      = FULLCusID.Substring(1, 4);
                CUSID         = Convert.ToInt32(CutCusID);
                newCUSID      = CUSID + 1;
                TransCUSID    = newCUSID.ToString("0000");
                NewFullID     = Cus + TransCUSID;
                TextBox3.Text = NewFullID;
            }
            catch
            {
                NewFullID     = "C0001";
                TextBox3.Text = NewFullID;
            }
        }