C# WINDOWS FORM APPLICATION

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace Dynamic_generate_id
{
    public partial class Form1 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;
        string str;
        int count;

        public Form1()
        {
            InitializeComponent();
        }

        private void btn_save_Click(object sender, EventArgs e)
        {
            OleDbConnection con = new OleDbConnection(ConnectionString);
            con.Open();
            str = "insert into caste(cast_code,cast_desc) values('" + lbl_castecode.Text.Trim() + "','" + txt_castename.Text.Trim() + "')";
            com = new OleDbCommand(str, con);
            com.ExecuteNonQuery();
            con.Close();
            MessageBox.Show("Records successfully Inserted");
            txt_castename.Text = "";
            autogenerated();
        }
       private void autogenerated()
        {
            OleDbConnection con = new OleDbConnection(ConnectionString);
            str = "select count(*) from caste";
            com = new OleDbCommand(str, con);
            con.Open();
            count =  Convert.ToInt16(com.ExecuteScalar()) + 1;
            lbl_castecode.Text = "CS00000000" + count.ToString();
            lbl_castecode.Enabled = false;
            con.Close();
        }

       private void Form1_Load(object sender, EventArgs e)
       {
           autogenerated();
       }
    }
}


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